HERMETIC
INTERCONNECT
SOLUTIONS
Perfect connections formission critical applications

Who we are and what we do
Martec is a leader in the design and manufacture ofhermetic interconnect solutions.
We are at the forefront of technological and materials expertise for mission criticalapplications required to maintain system integrity while operating in harsh or
hostile environments.

Perfect connections for mission critical applications
Exceptionally high strength
Up to 90,000 psi / 600 Mpa

Compact
From <3mm long

Exotic material options
Titanium, Hastelloy, Inconel

High temperature operation
From -55°C to 350°C
Fire wall capabilities to 1,000°C

AS9100 accredited

Designleaders inglass tometal sealtechnology

Air & gas impervious
Maintain fluid separation
Mouldability
Custom form factors plus
Mil-Spec equivalents
Superior leak rate
performance
1x10-7/8/9/10 cc/sec

Mission Critical Connections

2

Hermetic Interconnect Solutions

Contents

Commercial Aerospace
Actuators
Sensors: proximity, pressure & temperature
Engine & fuel system applications

Military
Ignition & weapon release systems
Sensors: proximity, pressure, temperature & speed
Vision systems

Industrial & Automotive
Condition monitoring: humidity & gas sensors
Sensors: vibration, pressure and temperature
Spectrometers: airport trace detection devices

MedicalTitanium hermetics for implantable medical devices
Electrical feedthroughs for Medical Autoclaves
Hermetic vacuum feed through for digital imaging.

Oil & Gas
Wire line tools (measurement/logging whilst drilling)
Containment seal/fire barrier
Sub-sea cable termination & condition monitoring

Space
Imaging systems
Cryogenic cooling
Ignition systems

www.martec.solutions

3

Coax Series
Martec’s impedance matched coaxial connectors can be supplied in hermetic designs tomeet standard impedance requirements of 50 or 75 Ω. Alternatively, we can provide
bespoke designs to suit your system requirements of a non-standard impedance level, toensure optimal system performance.
Our connectors are supplied in industry standard form factors, such as BNC, SMA, SMB
and N types, and are produced in a variety of materials to meet your specifications.
These include stainless steel and titanium with a choice of electroplated finishes, as well
as selective plating options to optimise earth bonding.

Features
Matched impedance variants - 50/75 Ω
Stainless steel / Inconel construction
Pressure rating up to 40,000 psi
Screen - grounded or floating options
Cable flyhead variants‘S’ parameters available for specific variants
Different housing options available

4

Hermetic Interconnect Solutions

High Speed Data

Part Number Builder

M-COAX-XXXX-XX-XX-X(XXX)
Code

Style

No. of Contacts

Code

Impedance

NP38

3/8" NPT

1

50

50Ω

NP12

1/2" NPT

Up to 4 (1 for SMA)

75

70Ω

NP34

3/4" NPT

Up to 7 (3 for SMA)

PF1

1" Push Fit

TBD

Code

InterfacePF1.5

1.5" Push Fit

TBDA

SMA-SMAPF2

2" Push Fit

TBD

B

SMB-SMBFM1

1" Flange Mount

TBD

C

Cable-Cable

FM1.5

1.5" Flange Mount

TBD

FM0

2" Flange Mount

TBD

Deviation
Code /
Modifications
For non-standard
code consult Martec.

Note: Cables used by default where specified are RG178 for 50Ω and RG59 for
75Ω assemblies. Please contact us for any other combinations or requirements.

www.martec.solutions

5

Rectangulars
Martec’s rectangular connectors can be supplied in a variety of formats and material
combinations to match customers’ stringent customised requirements. Rectangulardevices are suitable for interfacing compact enclosures. To ensure optimal integration
Martec can design tailored solutions including D-Sub or Micro D, or offer complete
customisation. Connectors can be designed and manufactured to meet individual
environmental, mechanical or installation requirements.
With high density pin counts and various termination types available, these connectors areused in critical, harsh environment applications for reliable data transfer. Martec’s custom
approach means that it is possible to produce optimised connectors with customised fitments.
These provide greater flexibility and options include high conductivity pin contacts, in-shell
signal conditioning and high reliability mounting methods.

Features
Custom fitments for critical, high performancesystem applications
High density pin count (to 0.050" pitch)
Hermetic sealing
High pressure capability

6

Hermetic Interconnect Solutions

High conductivity and low resistivity for highdata rates
Wide operating temperature range (typically -40
to +170 °C)
MIL-DTL 83513 (Micro D) and 24308 (D Sub) types

Micro D and D Sub

Part Number Builder

M-REC-X-X-XX-(XXX)Standards

Deviation Code /Modifications

A (MIL-DTL-83513 Type) Micro D
B (MIL-DTL-24308 Type) D Sub

Shell Size
D1
D2
D3
D4
D5
MA
MB
MC

For non-standard code
consult Martec.

Contact Style

Number of Contacts

PC PC Tail
SB Solder Bucket
SN Socket

9
15
25
37
50

www.martec.solutions

7

M12
These connectors are miniature threaded, hermetically sealed connectors that are designed
to meet and exceed the mechanical and environmental requirements IEC-61076-2-101
with fixed pin contacts, fused into a glass dielectric insert. These connectors are available
as receptacle with eyelet, solder bucket and/or pcb contacts.

Construction

Technical Specification

Standard Hermetic connectors are sealed by fusing
a single piece glass insert into a machined StainlessSteel Shell. The pin contacts are permanently fused
into the insert. To maintain thermal compatibility withthe glass insert, the contacts are manufactured from anickel alloy. The protective plating on the pin contacts
is electro-deposited gold over nickel. The Jam Nut is
supplied with a flourosilicone rubber O-ring for panel
sealing. All Martec M-M12 hermetic connectors are
RoSH compliant.

MechanicalContact Terminals

Contact Rating:#20, 2 amps per contact

EyeletShell: Stainless Steel
Insulator: Glass
Contacts: Nickel alloy
Contact Plating: Gold over Nickel

ElectricalInsulation Resistance:
100 MΩ @ 500VDC

PCB

Solder Bucket

Hermeticity
Leakage rate of less than 1 x 10-8 cc/sec at one
atmosphere pressure differential.

RoundedPressure
The standard hermetic connector is not designed
as a pressure resistant connector even though theinserts are capable of withstanding high pressure
differentials. For specific pressure criticalapplications please consult us.

Inserts
3 Pin

4 Pin

5 Pin

4

4

4

8 Pin
5

3

3

3
5

1

8

1

2

1

4

6
8

7
2

Hermetic Interconnect Solutions

1

3
2

Temperature Tolerance-55ºC to 175ºC. Higher temperature material
options are available.

Industrial & Automotive

Part Number Builder

M-M12-X-XX-P-X(XXX)
Deviation Code /Modifications
For non-standard code
consult Martec.

Shell StyleA
B
C
D

Round Flange
Square Flange
Jam Nut
Through Flange

Contact
Termination
2
3
4
5
6

Insert03 Three Pin
04 Four Pin
05 Five Pin
08 Eight Pin

EyeletSolder Bucket
PCB
RoundedSpecial (Dev)

Contacts
P Pinswww.martec.solutions

9Subsea Booted
Connectors
The Martec SBC feedthrough range has
been developed for mission critical subsea
and downhole instrumentation applications.
The push on key located boot-plug andreceptacle design allows on-site orworkshop harnessing using simple
handheld crimp tools.

Features
Booted plug provides an alternative to hard wiring
ideal for applications requiring periodic
maintenance.
Boot provides a robust and reliable retention ofplug to the receptacle, suited to harshenvironments.
Field Installation.
15 Kpsi (1,000 Bar) pressure tight hermetic glass
sealed receptacle.
Weld mountable receptacle or custom housed.
Seawater-tight boot with individual pressure
energised wire seals, no need for gels or grease.
Crimp contacts for 22 AWG wire (field installed orfactory preassembled)

Plug Pressure Rating

6,000 psi (410 Bar)

Depth

13,100 ft (4,000m)

Test Pressurea

6,400 psi (441 Bar)

Receptacle Pressure
Rating15,000 psi (1,034 Bar)

Test Pressureb

22,500 psi (1,550 Bar)

Leak rate< 1 x10-8 cc/sec @ 1atm

Temperature Rating

See Material Specification
table

Suitable Wire type22AWG Outer O .0411 /.0461” (1.04 /1.17mm)a
Tested with NBR (Option 1) boot. a+b Both tests
were conducted at ambient temperature.

Electrical Specification
No of ways

4

Insulation Resistance@ 20°C> 1GΩ @ 50Vdc

Dielectric Strength @20°C>1kV @ 1mA leakage

Plug Terminations

Max current per pin

2A

Wires are terminated using the crimp contacts
supplied with the booted connector.

Contact resistance<2.5mΩ

Housing Installation
The receptacle is designed to be welded into a
housing using an axial electron beam weld. For
welding guidance, please consult Martec. Alternative
options are available including a radial weld
installation and O-ring sealed version. Please contact
Martec to discuss

10

Environmental/Mechanical
Specification

Hermetic Interconnect Solutions

Push on Boot Plug

Part Number Builder

M-SBC-X-X-X(XXX)
No of Ways

Boot Materials
12
3
4

Nitrile (NBR)
Vitone (FKM)
Hydrogenated Nitrile (HNBR)
EPDM

1 4 Way
2 8 Way

Deviation Code /Modifications

Insert1 Solder Bucket
2 Straight Rounded pin
3 PCB Shoulder Pin

For non-standard code
consult Martec.

Material Specification
Plug
Boot

Operating Temperature
Option 1-4 to 212°F-20 to 100°C

4 to 392°F-20 to 200°C

Option 3d-22 to 257°F-30 to 125°C

Option 4d-67 to 266°F-50 to 130°C

Option 2

Nitrile (NBR)
dInsertPEEKContacts

Gold plated copper alloy & Stainless Steel304 ferrule.

Location Pin

Stainless Steel 316Ld

All material options stated are sea water chemically compatible. Please contact Martec to discuss specificchemical compatibility requirements
dThese materials are subject to qualification.
Select for ozone tolerant marine surface use.

www.martec.solutions

11

High Temperature
High Pressure (HTHP)
In many harsh environments high pressure is a major challenge. The ability to withstandsuch pressure is further complicated when elevated temperatures are also a factor. Martec
high-pressure/high-temperature bulkhead feedthroughs are designed to provide optimal
performance and reliability in these hostile conditions.

Features25,000 PSI @ 400 F (204 C) pressure tight glass
sealed connector
Solder Cups for 24 AWG wire
Threaded screw enables the removal of the product
Weld mounted wires creates strong connection

Pin Pattern
3

4

5

6

7

8

9

10

13

12

18

Hermetic Interconnect Solutions

21

39

Oil & Gas

Part Number Builder

M-HTHP-I-X-XX-X-X-62-(XXX)Pin Diameter

Body Material
I

Inconel 625

48 Ø.0462 Ø.062

Body Design
G O-ring Groove
F Weld Flange

See Pin Pattern
03
04
05
06
07
08
09
10
13
18
21
39

Pin Terminations
Right SideL LineF Solder Cup

Pin Terminations
Left SideL LineF Solder Cup

Special Modifications
If necessary contact Martec formore informationwww.martec.solutions

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Deviations
Martec hermetics can be customised to optimise for a multitude of demanding functional
requirements. Options range from feedthrough, penetrator and interconnect form factors
to exotic material selection and custom mounting arrangements for system integration.

Vacuum Flanges
Industry standard interface(e.g. 5015, 26482)
Standard flange forms(e.g. CF : KF)
Minimal trapped volumes
Low out gassing, bakable
materials

Filtering
System integrity underharsh interference
conditions
Compact design providing
space saving solutions
Mateability with otherstandard Mil-Spec
receptacles
Point of entry (POE) signal
conditioning

14

Hermetic Interconnect Solutions

Shell Materials

Pin Materials

Stainless Steel
Inconel(625/718)
Titanium
Hastaloymaterials

Alloy 48 / 52
Kovar
Stainless Steel
InconelSocketPeak insert
Industry standard
interface (e.g.
38999,26482)

Feed Through and Penetrator

Standards
Martec offers a wide range of hermetic military specification (“mil-spec”) connectors foraerospace, defence and industrial applications

Standard

Amphenol
SeriesFeatures

MIL-DTL-38999 Series I

LJT

Scoop-proof bayonet mating sub miniature circular

MIL-DTL-38999 Series II

JT

Bayonet mating sub miniature circular

MIL-DTL-38999 Series III

TVS

Scoop-proof tri-start sub miniature circular

JN

SJT

Scoop-proof bayonet mating sub miniature circular – Typhoon qualified

Micro 38999

2M

Scoop-proof Tri-start micro miniature circular

MIL-DTL-26482 Series I

PT/62GB

Bayonet lock miniature circular

MIL-DTL-26482 Series II

PT/602GB

Bayonet lock miniature circular

PAN

PT/602GB

Bayonet lock miniature circular

MIL-DTL-83723 Series III Threaded

BTY/BFY

Miniature quick disconnect threaded circular

EN2997 / ESC10BTY (Y144)

Miniature quick disconnect threaded circular, high temp

26500

MIL-DTL-26500

ZZL/ZZB

Medium threaded or bayonet lock circular

5015

MIL-DTL-5015

172GB

Threaded circular

24308

MIL-DTL-24308

17GB

Cable Mount D-sub

38999

26482

83723

www.martec.solutions

15

Specifying Hermetic
Interconnects
How many conductors?
Consider including a number of redundant conductors
to accommodate any system developments you haveplanned for the future, or to comply with specified
growth provisions.
What are the electrical requirements?
Work out a steady state and peak requirement for boththe current and voltage.
Will your GTMS be under any pressure?
Depending on the medium (for example, oil, water or avacuum) there may be a pressure differential to consider.
GTMS can be supplied in multi-pin preforms or, for highpressure applications (up to 60,000 psi / 400 MPa), in
individual glass beads.
How will your GTMS be attached?
Will it be secured with a standard O ring, for example,
or welded in place? Or will you need a custom-designed
mounting arrangement for optimum system integration?
What are your cable interface requirements?
Be sure to include any instructions for screen termination,
potting requirements and/or cable strain relief.
Do you require custom functionality?
If you have any specific requirements, such as
electromagnetic compatibility (EMC) filters or printed
circuit board (PCB) mounting, make sure they areincluded in your design specification.
What are your plating requirements?
We offer a wide range of in-house plating options,
including tin, nickel, hard and soft gold. We can also
customise the plating to meet any special or uniquerequirements. Note that gold plated solder contacts
should either be desoldered before installation, or
appropriate plating thickness specified, to avoid
solder embrittlement.
Are there any environmental factors?
If your application will be operating in a harsh or hostileenvironment (exposed to shock, vibration, thermalchanges or extreme temperatures, for example) thesewill need to be factored into the design.
What are the qualification requirements?
If qualification tests are required, these should be
discussed and specified during the design phase.
Martec is able to perform most qualification tests on theappropriate levels of assembly.
What testing will you need?
Examples include leak testing, pressure test,
geometrical and electrical testing; including breakdown,
voltage and insulation resistance of finished parts.

Martec Ltd
Thanet Way Whitstable
Kent CF5 3JF
T +44 (0)1227 793 733
F +44 (0)1227 793 735
E sales@martecltd.uk

www.martec.solutions