EMI SHIELDING MATERIALSAPPLICATION GUIDETABLE OF CONTENT•

RFI/EMI SHIELDING MATERIALS OVERVIEW

3•EMC DESIGN CONSIDERATIONS

4•AEROSPACE AND DEFENSE APPLICATIONS

6− ARMORED VEHICLES− MILITARY UAV AND DRONES− COMMUNICATION & MONITORING EQUIPMENT− MARINE TRACKING EQUIPMENT− COMMUNICATION SHELTERS− ENGINE CONTROL UNITS•INDUSTRIAL MACHINERY

14− INDUSTRIAL PRINTERS− INDUSTRIAL WEIGHING SYSTEMS•

15

RENEWABLE ENERGY− WIND TURBINE•

17

MEDICAL− SEQUENCING ANALYSIS− MASS SPECTROMETRY− INFUSION PUMP
− VENTILATOR•

22DATA & COMMUNICATION− DATA CENTER RACKS− NETWORK SWITCHES− 2U RACK MOUNT SERVER− SATELLITE COMMUNICATIONS•TRANSPORTATION

26− AC/DC CHARGING− ADAS− OTHER TRANSPORTATION APPLICATIONS•2ADVANCED DRIVER ASSISTANCESYSTEMS (ADAS)30TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDERFI/EMI SHIELDING
MATERIALS OVERVIEW
RFI/EMI shielding gaskets and components provide
exceptional EMC shielding solutions to address regulatorycompliance and performance needs. Our shielding solutions
include electrically conductive gaskets, EMI shielding
ventilation panels, shielded window, cableshielding and shielding components.

Why is EMI shielding important
Electromagnetic Interference - EMI
All active electronic devices have the potential to emit electromagnetic radiation. EMI shielding products protect criticalelectronic components and systems from EM interference.
• EMC compliance required by law/performance specifications• EMC non-compliance causes system level redesign late in product development process

Where is EMI shielding used
EMI shielding gaskets are applied at the seams of an enclosure to establish a low resistance conductive path to block radiatedemissions into and out of the enclosure.
• Conductive gaskets/windows/vents at enclosure assembly level• Conductive gaskets for module assembly• Conductive gasket at board level cans at PCB level
Enclosure3

Module2

PCB
1

Enclosure level shielding

Module level shielding
PCB level shielding

How we address electromagnetic compatibility (EMC)
Electromagnetic compatibility: Enables a device, equipment or system to function satisfactorily in its electromagnetic
environment without introducing intolerable electromagnetic disturbance to anything in that environment

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Electromagnetic Compatibility & Performance Considerations
Electromagnetic Compatibility (EMC): The ability of a device, equipment, or system to function satisfactorily
in its electromagnetic environment without introducing intolerable electromagnetic disturbance to anything inthat environment.
Here are some of the factors affecting electromagnetic compatibility:

Design for EMC: Consider EMC early in the design process, from careful layout of PCB’s andcomponents ensuring good signal integrity. Design with the accommodation of EMI gaskets
for enclosure seams and covers, I/O connections, doors etc. Retrofit is expensive.

Mechanical: Closure forces of gaskets vary dependant on material, profile, and size. Enclosure
panel rigidity will dictate the minimum number of fixings. Compression limits should be used
to protect the gasket from damage caused by over compression/deflection.

RFI/EMI Shielding: The basis of RFI/EMI shielding to make a faraday cage of the enclosure andensure good grounding, this can be at PCB level for discreet components, modular and the final
enclosure. Enclosures can vary in size from small handheld devices up to large cabinets andarchitectural rooms/buildings.

Shielding Effectiveness: To ensure good shielding effectiveness, low contact resistance isrequired between the gasket and the mating surface of the enclosure. For optimum shielding
it is best to ensure metal to metal contact by using gaskets in grooves or incorporate
labyrinth designs.

Environmental: Dust and moisture sealing is often a requirement alongside the EMC needs.
Electrically conductive elastomers (ECE) provide this up to IP66 and above if the design is toachieve this. ECE fluorosilicones will seal against fuels, oils etc. For very harsh environments
non-conductive seals can be incorporated in the design.

Chemical or Galvanic Compatibility: Two dissimilar metals in the presence of an electrolyte e.g.
salt fog will act as a battery and create a flow of electric current. This effect can cause corrosionof the less noble material and will increase contact resistance between the gasket and enclosure
causing a reduction in shielding effectiveness.
Electromagnetic Fields: When shielding magnetic fields generally the requirement is 10 kHz andabove, high permeability metal type gaskets are needed these gaskets have a high current
carrying capacity and are suitable for EMP protection. High frequency electric field 1 GHz andabove require highly conductive more noble materials such as conductive elastomers with silver
plated particles.

4TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDEEMI/RFI PRODUCT PORTFOLIO IN KEY MARKETS

Product

Conductive
Elastomers

Oriented Wirein Silicone

Excellent temperature range and areresistance to compression set andFluorosilicone has superior resistanceto fuel oils and solvents.

Provides excellent shielding with
EMP survivability and will also
provide an environmental seal

KnittedWire Mesh

EMI Shielding Ventilation
Panels

Knitted wire mesh gaskets provide an
excellent cost-effective EMI gasket,
providing shielding in the magnetic aswell as electric fields.

Made from aluminumhoneycomb mounted into aframe.

Connector
Gaskets

Woven & Expanded Wirein Elastomers

Tooling for a wide range of standard MIL
connector gaskets. Different materials
are available to meet the demands ofEMI shielding, environmental sealing,galvanic compatibility and fuel/oil
resistance.

Provides an excellent EMI andenvironmental seal, the metal
reinforcement helps eliminate
cold flow due to overcompression.

Data & WirelessCommunication

Aerospace,
Defense &Military

Automotive

Industrial &Commercial
Transportation

EnergyIndustrial

MedicalConductive Elastomers
KnittedWire Mesh
Oriented Wirein Silicone
Woven & Expanded
Wire in Elastomers
EMI Shielding Ventilation
PanelsConnector
Gaskets

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AEROSPACE, DEFENSE & MARINE• The Aerospace and defense industries have always been the main drivers for RFI/EMI shielding design and products. Achieving
EMC (electromagnetic compatibility) in this sector is safety-critical, whereas in everyday life it can just be a frustrating nuisance.
• Aircraft can get struck by lightning with regular occurrence which will cause an electromagnetic pulse or EMP. EMP will havea devastating effect on electronic circuitry, so it is important that the aircraft has a path for the lightning to continue withoutcausing damage. Space is another matter; satellites are in a very hostile electromagnetic environment with solar flares thatcan emit a coronal mass ejection. We are protected on Earth by the magnetosphere, but satellites don’t have that advantage,
so shielding is paramount to ensure the safety of the satellite and its systems. Greater integration of electronics meanselectromagnetic compatibility between systems is of utmost importance to ensure they work in harmony and do not interferewith each other. Aircrafts are more fly-by-wire than mechanical systems, with complex software operating computerized systems.
Sensors measuring the aircraft environment, flight data etc. all need to communicate with each other, operate independently andprovide back up for system failure or malfunction. Electronics engineers are very familiar with this and will consider in their design
good board layout, filtering, grounding, signal integrity etc. to try resolving EMI at its source. However, shielding of the enclosure
is just as important and solves the problem of radiated emissions and susceptibility. Mating surfaces on an enclosure can lookvery flat and you think there is full metal to metal contact but, in a mass production process nothing can be that flat and gaps
will exist. These gaps are slots and can become radiating antennas. This joint unevenness can be addressed by using an electricalgasket and adding more fixings to get good contact between the mating surfaces.
• RFI/EMI shielding is a mechanical fix for an electrical problem and the enclosure design engineer should be aware of the typesof gaskets available and their different attributes and ensure there is enough land area on the enclosure seams, doors etc. to
fit the gasket. In Aerospace, weight and size of equipment and systems is important so miniaturization where possible is used.
This means that the shielding options available to the design engineers must also be small and offer good shielding. Electricallyconductive elastomers are the best option for Aerospace as the material can be molded, extruded or fabricated into very small
components or deposited directly to hardware. Many electrically conductive fillers are available to suit shielding requirements anda fluorosilicone base meets the needs of resistance to fuel oils etc.

6TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDEARMORED VEHICLE APPLICATION
Information Distribution System
Challenge: System requires high level of EMI shielding and an environmental seal; the structure is an assembly of machined
aluminium housings within the vehicle
SHIELDING TYPEFEATURES

BENEFITS

Conductive elastomer O ring seals• Conductive elastomers can provide
great EMI shielding performance on
casing lids

• Material options to provide required
EMI performance and galvanic
compatibility• Range of different materials andprofiles available to suit the application
including a UL94-V0 material”• Provide low-contact resistance
between connector and enclosure

Connector gasket• Meet MIL-C standard sizes, andcommon sub D connector gaskets.

• Ensures electrical bonding between
the surfaces with a very low contact
resistanceJam Nut Seals• Compression molded• Maintain the integrity of the seal

• Compliant with MIL-FTL-38999, MILDTL-26482, MIL-DTL-81511.

• Ideal where small cross section and/or
small inside diameter is required.

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Rotary Base Joint (RBJ)
Challenge: Large housing in base of vehicle with many connectors, which requires EMI shielding and environmental sealing
SHIELDING TYPEFEATURES

BENEFITS

Oriented Wire flat gasket• Solid and sponge silicone flat gasket
material populated with verticallyoriented Monel or aluminium wires up
to 140/sq cm.

• Material options to provide required
EMI performance and galvanic
compatibility

Connector gasket• Meet MIL-C standard sizes, andcommon sub D connector gaskets• Ensures electrical bonding between
the surfaces with a very low contact
resistanceJam Nut Seals• Compression molded• Maintain the integrity of the seal

• Compliant with MIL-FTL-38999, MILDTL-26482, MIL-DTL-81511.

• Ideal where small cross section and/or
small inside diameter is required.

• Provides excellent shielding with EMP(electromagnetic pulse) survivability
and will also provide an environmental
seal.

Auxiliary turret pod
Challenge: Auxiliary electronics systems pod for attachment, to rear of turret, air cooled system

8

SHIELDING TYPEFEATURES

BENEFITSEMI Honeycomb vent• Allows good airflow and provides highlevel of EMI shielding• Improved EMI shielding over air inlet/
outlet apertures

TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDEMILITARY, AEROSPACE, UAV & DRONES APPLICATIONSSHIELDING TYPEAPPLICATIONFEATURES

BENEFITS

Conductive
elastomer O ringseals

Control Systems• Conductive elastomers can provide
great EMI shielding performance at a
relatively low cost

• Material options to provide required
EMI performance and galvanic
compatibility• Range of different materials
and profiles available to suit theapplication including a UL94-V0
material”• Provide low contact resistance between
connector and enclosure

Connector Gasket

I/O Panel• Meet MIL-C standard sizes, andcommon sub D connector gaskets• Ensures electrical bonding between
the surfaces with a very low contact
resistance

Fluorosilicone
conductive
elastomer O rings

Power distribution
systems• Conductive elastomers can provide
great EMI shielding performance at a
relatively low cost

• Material options to provide required
EMI performance and galvanic
compatibility• Range of different materials
and profiles available to suit theapplication including a UL94-V0
material”• Provide low contact resistance between
connector and enclosure• Solid and sponge silicone flat gasket
material populated with verticallyoriented Monel or aluminium wires up
to 140/sq cm.

• Material options to provide required
EMI performance and galvanic
compatibility• Offering a wide range of standard MIL
connector gaskets. Different materials
are available to meet the demands ofEMI shielding, environmental sealing,galvanic compatibility and fuel / oil
resistance.

• Ensures electrical bonding between
the surfaces with a very low contact
resistanceOriented wire
gaskets

Connector gaskets

Control systems

Power distribution
systems and control
systems

Power distribution
systems and control
systems• Provides excellent shielding with EMP(electromagnetic pulse) survivability
and will also provide an environmental
seal.

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OTHER AEROSPACE, DEFENSE AND MARINE APPLICATIONSCommunication and monitoring Equipment
SHIELDING TYPEAPPLICATIONFEATURES

BENEFITS

Conductive elastomer
flat gaskets

Enclosure• Meet MIL-C standard sizes, andcommon sub D connector gaskets• Ensures electrical bonding between
the surfaces with a very low contact
resistanceOriented Wire FlatgasketDistribution Control
Panel• Solid and sponge silicone flat gasket
material populated with verticallyoriented Monel or aluminium wires up
to 140/sq cm.

• Material options to provide required
EMI performance and galvanic
compatibility• Offering a wide range of standard
MIL connector gaskets. Different
materials are available to meetthe demands of EMI shielding,environmental sealing, galvanic
compatibility and fuel / oil resistance.

• ensures electrical bonding between
the surfaces with a very low contact
resistance

Enclosure

Connector Gasket

10

I/O Panel• Provides excellent shielding with
EMP (electromagnetic pulse)
survivability and will also provide anenvironmental seal.

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Marine Tracking Equipment
SHIELDING TYPEAPPLICATIONFEATURES

BENEFITS

Knitted Wire Mesh

Enclosure• The mono-filament interlocking loop
construction gives strength whileallowing it to confirm to almost any
size or shape.

• Delivers good galvanic match withmating flanges, thereby limiting thepossibility of corrosion between
gasket and flange.

• A selection of elastomer cores areavailable to meet conditions such astemperature range, compression set,
compression force.

• Excellent radio frequency interference(RFI)/electromagnetic interference(EMI) shield between two metallic
surfaces.

• Solid and sponge silicone flat gasket
material populated with verticallyoriented Monel or aluminum wires up
to 140/sq cm.

• Material options to provide required
EMI performance and galvanic
compatibility

Oriented wire flat
gasketConsole Gland
Plate
External
Antennas
Gyroscope• Provides excellent shielding with EMP(electromagnetic pulse) survivability
and will also provide an environmental
seal.

Conductive elastomer
flat gaskets

Power
distribution• Meet MIL-C standard sizes, andcommon sub D connector gaskets• Ensures electrical bonding between
the surfaces with a very low contact
resistance

Shielded window

Display• Very fine woven wire mesh trapped
between or embedded in a clear
optical substrate• providing optimum transparency andEMI shielding.

• Termination of the EMI Shield isachieved with a continuous low
resistance conductive edge aroundthe window
EMI Shielding ventCabinetEnclosure Vent

• Allows good airflow and provides highlevel of EMI shielding• Improved EMI shielding over air inlet/
outlet apertures

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Communication Shelters
SHIELDING TYPEAPPLICATIONFEATURES

BENEFITS

Knitted Wire Mesh

Door seals• The mono-filament interlocking loop
construction gives strength whileallowing it to confirm to almost any
size or shape.

• Delivers good galvanic match withmating flanges, thereby limiting thepossibility of corrosion between
gasket and flange.

• A selection of elastomer cores areavailable to meet conditions such astemperature range, compression set,
compression force.

• Excellent radio frequency
interference (RFI)/electromagnetic
interference (EMI) shield between
two metallic surfaces.

vents

HVAC

• Hi-impact ABS UL94V-0 fire
retardant moulding thick aluminumhoneycomb and a nickel/copper
fabric gasket to ground thehoneycomb to the metalwork• Deliver good air flow is required forcooling and ventilation but where
EMC compliance must be ensured.

Oriented Wire

Access Panel• Solid and sponge silicone flat gasket
material populated with verticallyoriented Monel or aluminium wires
up to 140/sq cm.

• Material options to provide required
EMI performance and galvanic
compatibility• The mono-filament interlocking loop
construction gives strength whileallowing it to confirm to almost any
size or shape.

• Delivers good galvanic match withmating flanges, thereby limiting thepossibility of corrosion between
gasket and flange.

• A selection of elastomer cores areavailable to meet conditions such astemperature range, compression set,
compression force.

• Excellent radio frequency
interference (RFI)/electromagnetic
interference (EMI) shield between
two metallic surfaces.

Knitted bandage

12

Shelter Panel seams• Provides excellent shielding with
EMP (electromagnetic pulse)
survivability and will also provide anenvironmental seal.

TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDEEngine Control units
SHIELDING TYPEAPPLICATIONFEATURES

BENEFITS

Expanded and Woven
Wire

Case Seal• Woven aluminum wire, expanded
monel, or aluminum sheet, combinedwith silicone, flurosilicone orsynthetic rubber• The mono-filament interlocking loop
construction gives strength whileallowing it• Provides excellent EMI andenvironmental seal
Fluorosilicone
conductive elastomer
O rings

Connector gaskets

Fuel Control Unit
FADEC (FullAuthority DigitalEngine Control)

Connector• Conductive elastomers can provide
great EMI shielding performance at a
relatively low cost

• Material options to provide required
EMI performance and galvanic
compatibility• Range of different materials
and profiles available to suit theapplication including a UL94-V0
material”• Provide low contact resistance
between connector and enclosure• Offering a wide range of standard
MIL connector gaskets. Different
materials are available to meetthe demands of EMI shielding,environmental sealing, galvanic
compatibility and fuel / oil resistance.

• Ensures electrical bonding between
the surfaces with a very low contact
resistance

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INDUSTRIAL MACHINERY

Industrial Printers
SHIELDING TYPEAPPLICATIONFEATURES

BENEFITS

Oriented wire flat
gaskets (470 material)

Enclosure• Can be fitted with compression limit
stops or collars.

• A good solution for achieving RFI/
EMI/EMP and environmental sealing
in a single gasket.

• Good conformity to allow for unevensurfaces.
• Self-adhesive backing to allow foreasy assembly
Conductive Elastomer
O ringAccess panel• Ideal for use as access panels, seals,
connector gaskets etc.

• Conductive elastomers can provide
great EMI shielding performance on
casing lids

• Material options to provide required
EMI performance and galvanic
compatibility• Range of different materials
and profiles available to suit theapplication including a UL94-V0
material”• Provide low-contact resistanceIndustrial Weighing systems
SHIELDING TYPEAPPLICATIONFEATURES

BENEFITS

Oriented wire flat
gaskets (470 material)

Enclosure• Can be fitted with compression limit
stops or collars.

• A good solution for achieving RFI/
EMI/EMP and environmental sealing
in a single gasket.

• Good conformity to allow for unevensurfaces.
• Self-adhesive backing to allow foreasy assembly
SNG Conductive
Elastomer O ring14Access panel• Ideal for use as access panels, seals,
connector gaskets etc.

• Conductive elastomers can provide
great EMI shielding performance on
casing lids

• Material options to provide required
EMI performance and galvanic
compatibility• Range of different materials
and profiles available to suit theapplication including a UL94-V0
material”• Provide low-contact resistance

TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDERENEWABLE ENERGY

WIND TURBINE
Gear box casings, bearing casings, access panels, de-icing systems
Challenge: Gaskets are required for environmental sealing and for ESD/grounding, resistance to oils is required; for the US market
versions UL-HB flammability rating is required
SHIELDING TYPEFEATURES

BENEFITS

Conductive elastomer
O ring seals• Conductive elastomers can provide great EMI
shielding performance on casing lids

• Material options to provide required EMI
performance and galvanic compatibility• Range of different materials and profiles
available to suit the application including a
UL94-V0 material”• Provide low-contact resistance between
connector and enclosure

Connector gasket• Meet MIL-C standard sizes, and common sub D
connector gaskets.

• Ensures electrical bonding between the surfaces
with a very low contact resistance

Conductive 1/2 wrap

• -Closed cell sponge with conductive fabricwrapped around 1 edge

• Will provide a combined EMI and environmental
seal• Can be provided as a fabricated gasket• Low closure force

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Control Equipment Enclosures
Challenge: EMI and environmental seals required on the doors of equipment enclosures

SHIELDING TYPEFEATURES

BENEFITS

Knitted Wire Mesh

• The mono-filament interlocking loop
construction gives strength while allowing it toconfirm to almost any size or shape.

• Delivers good galvanic match with mating
flanges, thereby limiting the possibility ofcorrosion between gasket and flange.

• A selection of elastomer cores are available tomeet conditions such as temperature range,
compression set, compression force.

• Excellent radio frequency interference (RFI)/
electromagnetic interference (EMI) shield
between two metallic surfaces.

Connector gasket• Meet MIL-C standard sizes, and common sub D
connector gaskets• Ensures additional electrical bonding between
the surfaces with a very low contact resistanceJam Nut Seals• Compression molded• Maintain the integrity of the seal

• Compliant with MIL-FTL-38999, MIL-DTL-26482,
MIL-DTL-81511.

• Ideal where smallcross section and/or small
inside diameter is required.

• Allows good airflow and provides high level ofEMI shielding• Improved EMI shielding over air inlet/outlet
apertures

EMI Honeycomb vent16TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDEMEDICALSEQUENCING ANALYSIS
Lid/access panel sealing
Challenge: Covers for sample modules require a soft and conformable EMI gasket
SHIELDING TYPEAPPLICATIONFEATURES

BENEFITS

Conductive foam

Module covers• Very soft and conformable• Low closure force• Provided in cut parts• Adhesive backing aids assembly• Provided with conductive adhesive
backing• Provides shielding on cover• Soft and conformable• Low closure force• Provides environmental andEMI seal• Combined EMI and environmental
seal• Adhesive backing on
environmental part

• Adhesive backing aids assembly• Soft and conformable• Low closure force• Adhesive backing• Adhesive backing aids assembly

Knitted mesh withenvironmental seal

Conductive fabric-overfoam

Enclosure bodyseams

Enclosure• Wide range of profiles• Can be fabricated into a gasket

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MASS SPECTROMETRYSHIELDING TYPEAPPLICATIONFEATURES

BENEFITS

Oriented wire insilicone

Connector• High EMI shielding performance• provides shielding on the connector
interface

Conductive fabric overfoam

Enclosure andaccess panels

Conductive foam

• Reliable low surface contact
resistanceInternal shielding• Low closure force• Adhesive backing to aid assembly• Takes up wide tolerances• Supplied in standard lengths and cut
to length during assembly• Supplied as standard strip, easily cut
to various lengths during assembly• Soft and conformable• Low closure force• Provided as a cut flat gasket• Provided as cut part to fit directly into
assembly• Conductive adhesive backing to aid
assembly
Silicone sponge

Environmental
sealing• Supplied as cut gasket• Soft and conformable• Provides internal shielding within unit

• Soft and conformable• Low closure force• Bespoke flat gaskets to provide
sealing in key areas• Supplied as pre-cut bespoke seals tofit directly into the assembly.

• Adhesive backing to aid assembly18TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDEINFUSION PUMPSENSORCOMMUNICATION POD

Conductive Gasket and Seal

Conductive Environmental Seal

FLOW STOPENCLOSURE

Nonconductive Environmental Seal

Conductive Elastomer O-ring

POWER SUPPLY
Nonconductive Environmental Seal

EMI Solution

Application

Key Product Features

Conductive
Elastomer O-Ring• Enclosure• Communication
Pod• Conductive elastomers can provide• Material options to provide required
great EMI shielding performance at a
EMI performance and galvanic
relatively low costcompatibility• Range of different materials and• Provide low contact resistanceprofiles available to suit the application
between connector and enclosure
including a UL94-V0 material"

Conductive
Gasket• Sensor• Power Supply

Non-conductive
Environmental
Seal O-Ring• Housing Flow stop

• The groove also forms a compression
stop for the O-Ring gasket• Provides an environmental seal byachieving metal to metal contact
Moisture or pressure sealing

Conductive
Elastomer• Communication
Pod• Fully cured silicones or fluorosilicone
loaded with a variety of highly
conductive particles providing
superior EMI/RFI shielding
performance combined with excellent
environmental sealing• Ensure complete electricalconductivity is maintained acrossthe joint• Ensure galvanic compatibility whilst
providing low contact resistance
between mating surfaces-

Benefits• Ensures additional electrical bonding
between the surfaces with a very low
contact resistance

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VENTILATORInterruption in medical device performance such as ventilator can be the difference between life and death. Without proper EMI
shielding, medical devices, including life-support systems and essential monitoring equipment are vulnerable to signal noise,damage, or total functional impairment.
A ventilator that doesn’t meet prescribed emission limits can lead to various unfavorable consequences for other medical devices:
Potential Equipment Shutdown: In the worst-case scenario, the non-compliant ventilator might unexpectedly shut down, a criticalissue when it’s supposed to operate continuously, 24/7.
Intermittent Failures: Such non-compliance can result in intermittent failures, disrupting normal device operation. Identifying andtroubleshooting the source of electromagnetic interference (EMI) disturbances can be time-consuming and challenging. These
intermittent failures could lead to the malfunction of essential features like alarms, lights, motors, displays, and LED indicators
during crucial moments.
Metastable Logic: Another consequence could be the occurrence of metastable logic, typically caused by a logic gate getting stuck
between states 0 and 1. This can trigger a firmware error, necessitating a manual restart of the machine.

Shielded Window

Connector Gasket
Conductive O Ring

Knitted Wire Mesh

Fabric over foam

20TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDESHIELDING TYPEAPPLICATIONFEATURES

BENEFITS

Connector Gasket• Air Filter Cover• Offering a wide range of standard MIL
connector gaskets. Different materials
are available to meet the demands ofEMI shielding, environmental sealing,galvanic compatibility and fuel / oil
resistance.

• Ensures electrical bonding between
the surfaces with a very low contact
resistance

Shielded Window• LCD Display• Termination of the EMI Shieldwindows to the enclosures is achieved
with a continuous low resistance
conductive edge around the window• providing optimum transparency andEMI shielding.

Fabric over foam

• PCB

• Soft and conformable, low closureforce• Grounding• Available with adhesive backing• Available in many profile options
Knitted Wire Mesh

Conductive o ring

• Enclosure• Fan• The mono-filament interlocking loop
construction gives strength whileallowing it to confirm to almost any
size or shape.

• Delivers good galvanic match withmating flanges, thereby limiting the• A selection of elastomer cores areavailable to meet conditions such astemperature range, compression set,
compression force.

• Excellent radio frequency interference(RFI)/electromagnetic interference(EMI) shield between two metallic
surfaces.

• Conductive elastomers can provide
great EMI shielding performance at a
relatively low cost

• Material options to provide required
EMI performance and galvanic
compatibility• Range of different materials
and profiles available to suit theapplication including a UL94-V0
material”• Provide low contact resistance
between connector and enclosure

possibility of corrosion between
gasket and flange.

TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDE21

DATA & COMMUNICATIONS

In today’s environment, data centers are gaining importance due to the trend of outsourcing data access through the Cloud, while
supporting bandwidth-intensive applications. Data center managers want to squeeze every bit of performance out of the data
center architecture. Network equipment manufacturers need to consider Electromagnetic Compatibility as a potential inhibitor to
maximize speed and efficiency in data centers.
Increases in data speed lead to commensurate increases in noise and heat. Greater connectivity supporting more wireless devices
results in more signals and increased connector heat. All of these changes related to 5G place greater emphasis on appropriate EMI
shielding, and as 5G evolves, engineers will need to meet the challenges of designing for faster data speeds, increased connectivity,and higher frequencies.

SYSTEM ARCHITECTURE

CONNECTIVITY

More complexity with multiple electronics
sub-systems, ensuring overall system
performance requires that these subsystems do not interfere with each other.

Proliferating wireless devices
augmenting # of signals and increasing
connector heat

POWER DENSITYDATA SPEEDS

Slowing of Moore’s Law increases
density creating more heat andsignal noise

Increasing speeds create more noiseand heat

EMC REGULATION
Growing regulation for electromagnetic
compliance making EMC more important
Electromagnetic interference shielding refers to
the attenuation, in reflection and/or absorption,of electromagnetic radiation through the use ofa material that acts as a “shield” against it.
For radiated emissions, this can be achieved byusing materials and components that will
create a Faraday cage from the enclosure, orby creating a smaller Faraday cage within theenclosure.

22

TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDEData Center Racks

1
2

3

1

Gaskets fill gaps in enclosure seams and joinsforming a conductive path.

2

Soft & flexible gaskets for poor tolerances withfabric over foam material

3

Vent panels allow air/cooling while maintaining
the faraday cage.

Product type

Application

Key Product features

Benefits

Spring Fingers

Strips for rack grounding

Suitable for repeated insertions

Reliable grounding of racks to enclosure

Knitted Wire Mesh

Door gasket

Available with a soft core

Robust gasket

EMI Honeycomb ventShielding over air inlet/outlet apertures

Allows good airflow and provides
high level of EMI shielding

Improved EMI shielding overair inlet/outlet apertures

Conductive Fabric over foam

Door gasket Strips for rack grounding

Very soft and conformablehigh wear resistance

Reliable grounding of racks Provides
door seal with a low closure force

TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDE

23

Network Switches

EMI Spring
EMI Spring
EMI FoF Gasket
Chassis - CoverEMI Spring
Product typeEMI Spring
Application

Key Product features

Benefits

Chassis cover gasket

Soft and conformable

Provides EMI shielding on coverwith low closure force

Metal spring fingers

Grounding to chassis

Suitable for repeated insertions

Reliable grounding

Metal spring fingers

Grounding of chassis to enclosure

Suitable for repeated insertions

Reliable grounding

Conductive fabric over foam

2U RACK Mount Server
EMI Spring Gasket

EMI Spring
EMI Spring
EMI Gasket
for Cover

EMI Spring
Product type

Key Product features

Benefits

Chassis cover gasket

Soft and conformable

Provides EMI shielding on coverwith low closure force

Metal spring fingers

Grounding to chassis

Suitable for repeated insertions

Reliable grounding

Metal spring fingers

Grounding of chassis to enclosure

Suitable for repeated insertions

Reliable grounding

Conductive fabric over foam24Application

TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDESatellite Communications
SHIELDING TYPEAPPLICATIONFEATURES

BENEFITS

Conductive Elastomer

Enclosure• Fully cured silicones or fluorosilicone
loaded with a variety of highly
conductive particles providing
superior EMI/RFI shielding
performance combined with excellent
environmental sealing• Ensure complete electricalconductivity is maintained acrossthe joint• The mono-filament interlocking loop
construction gives strength whileallowing it to conform to almost any
size or shape• Delivers good galvanic match withmating flanges, thereby limiting thepossibility of corrosion between
gasket and flange• A selection of elastomer cores areavailable to meet conditions such astemperature range, compression set,
compression force• Excellent radio frequency interference(RFI)/electromagnetic interference(EMI) shield between two metallic
surfaces• Elastomer compounds directly
dispensed onto component hardware
or enclosure via a pressurized fluid
dispensing system• Suited to applications where
small, intricate EMI gasket profiles
are required, such as on multicompartment labyrinth housings withminimum gaskets land area wheretraditional larger types of gaskets are
not suit

Knitted Wire MeshForm in Place

Internal module• RFI/EMI shielding and/or
environmental seal for dust andmoisture• Ensure galvanic compatibility whilst
providing low contact resistance
between mating surfaces• Reduces assembly costs associatedwith traditional gaskets
HoneyComb Vent

I/O Panel• Hi-impact ABS UL94V-0 fire retardant
moulding thick aluminum honeycomb
and a nickel/copper fabric gasket
to ground the honeycomb to themetalwork• Deliver good air flow is required forcooling and ventilation but where
EMC compliance must be ensured

TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDE

25

TRANSPORTATION

AC/DC CHARGINGIn the dynamic and ever-evolving electric vehicle (EV) industry, it is imperative to partner with an experienced EMI/RFI shielding
manufacturer that specializes in crafting tailored solutions for intricate and cutting-edge components.
At TE, our expertise in the production of customized EMI/RFI shielding components. Our extensive expertise in delivering custom
solutions for electromagnetic interference (EMI) and radio-frequency interference (RFI) mitigation enables us to collaborate
seamlessly with your design team. We offer valuable input on dimensional precision, tolerance specifications, and the selection of
optimal raw materials to deliver cost-effective and efficient shielding solutions.

26

TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDEAC Charging
SHIELDING TYPEAPPLICATIONFEATURES

BENEFITS

Conductive ½ wrap

Panel Enclosure• Closed cell sponge with conductive
fabric wrapped around 1 edge

• Will provide a combined EMI andenvironmental seal

• Can be provided as a fabricatedgasket• Low closure force• The mono-filament interlocking loop
construction gives strength whileallowing it to confirm to almost any
size or shape.

• Delivers good galvanic match withmating flanges, thereby limiting thepossibility of corrosion between
gasket and flange.

• A selection of elastomer cores areavailable to meet conditions such astemperature range, compression set,
compression force.

• Excellent radio frequency interference(RFI)/electromagnetic interference(EMI) shield between two metallic
surfaces.

• Hi-impact ABS UL94V-0 fire retardant
moulding thick aluminum honeycomb
and a nickel/copper fabric gasket
to ground the honeycomb to themetalwork• Deliver good air flow is required forcooling and ventilation but where
EMC compliance must be ensured.

Knitted Wire Mesh

Kemvent

Knitted Wire Mesh

Connector Gasket

TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDE27

DC Charging
SHIELDING TYPEAPPLICATIONFEATURES

BENEFITS

Conductive ½ wrap

Enclosure• Closed cell sponge with conductive
fabric wrapped around 1 edge

• Will provide a combined EMI andenvironmental seal

• Can be provided as a fabricatedgasket• Low closure force• The mono-filament interlocking loop
construction gives strength whileallowing it to confirm to almost any
size or shape.

• Delivers good galvanic match withmating flanges, thereby limiting thepossibility of corrosion between
gasket and flange.

• A selection of elastomer cores areavailable to meet conditions such astemperature range, compression set,
compression force.

• Excellent radio frequency interference(RFI)/electromagnetic interference(EMI) shield between two metallic
surfaces.

Knitted Wire Mesh

Door

EMI Shielded Window

Display• Termination of the EMI Shieldwindows to the enclosures is achieved
with a continuous low resistance
conductive edge around the window• Providing optimum transparency andEMI shielding.

EMI Vent

Ventilation• Hi-impact ABS UL94V-0 fire retardant
moulding thick aluminum honeycomb
and a nickel/copper fabric gasket
to ground the honeycomb to themetalwork• Deliver good air flow is required forcooling and ventilation but where
EMC compliance must be ensured.

Environmental sealing
gasketDoor• Offers versatile design and styles• Sealing in the harshest environments• Enables complex shapes

Conductive Wrap

Shielded Windows
EMI Vents

Knitted Wire Mesh
Door Gasket

28

TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDEOTHER TRANSPORTATION APPLICATIONS

Tyre Pressure Monitoring system

Cherry picker vehicles• Electrically Conductive Elastomer O rings• Conductive elastomer O rings• Environmental seals

Diesel engines for specific applications

EV bus and truck development• Rocker cover gasket• O ring seals• Fluorosilicone conductive elastomer O ring

• Electrically Conductive Elastomer O rings

EV unmanned race car• Inverter housing• Conductive elastomer O rings

TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDE29

ADVANCED DRIVER ASSISTANCE SYSTEMS (ADAS)Electromagnetic Interference (EMI) and Radio Frequency Interference (RFI) pose threats to electronic signal integrity and strength,
leading to disruptions and suboptimal performance in sensitive communication systems and devices. In the context of Advanced
Driver Assistance Systems (ADAS), EMI becomes a critical safety concern. To mitigate these issues, robust engineering design isessential.
Vehicles with advanced driver assistance systems (ADAS) include a wide range of electronics, many of which have a high risk ofpropagating EMI. Numerous design best practices exist to address electronic noise, and while engineers might lack significant
control over the electrical systems, there are still a few design considerations that can minimize the impact of electromagnetic
interference (EMI) on sensors and software.
It is critical to consider EMI/RFI shielding solutions that effectively reduce susceptibility to electronic malfunctions by either
blocking external electromagnetic waves or preventing the emission of internal electromagnetic waves that could interfere withsurrounding circuits or devices in and around ADAS components.

SHIELDING TYPEAPPLICATIONFEATURES

BENEFITS

Form-in-Place

Housing Seal

• Elastomer compound dispensed
directly onto hardware• Suited to applications where small
intricate EMI gasket profiles are
required• EMI shielding and/or environmental
seal for dust and moisture• Can reduce assembly costs• Low closure force

Conductive elastomer

30

Camera, Radarand Data Module
Seal• Silicone or fluorosilicone loadedwith highly conductive particles
providing superior EMI shielding
performance combined with excellent
environmental sealing.

• Material options to provide required
EMI performance and galvanic
compatibility• Provides low contact resistance
between mating surfaces

TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDEKemtron Extended Product Portfolio Contact Information
United Kingdom

Rest of Europe

Phone: +44 (0) 1376 348115

Phone: +44 (0) 1376348115

Email: info.braintree@te.com

Email: info.braintree@te.com

FranceAsia

Phone: + 33 (0) 160778316

Phone: +44 (0) 1376348115

Email: info.braintree@te.com

Email: info.braintree@te.com

Germany
Phone: +44 (0) 1376348115
Email: info.braintree@te.com

TE Connectivity, TE, TE connectivity (logo), and Kemtron Proven EMC Shielding (logo) are trademarks owned or licensed by the TE Connectivity Ltd. family of companies.
All other logos, products and/or company names referred to herein might be trademarks of their respective owners.
The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is believed to be reliable. However,TE Connectivity makes no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. TE Connectivity‘s obligations shall only be
as set forth in TE Connectivity‘s Standard Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or consequential
damages arising out of the sale, resale, use or misuse of the product. Users of TE Connectivity products should make their own evaluation to determine the suitability of eachsuch product for the specific application.
© 2024 TE Connectivity. All Rights Reserved.
Published 01-24

TE CONNECTIVITY / PERFORMANCE MATERIALS / EMI SHIELDING MATERIALS APPLICATION GUIDE