TECHNICAL DATASHEETPJ Open Frame Power Supply
24V 50W 1 Phase / PJ-24V50W□NAPJ
Highlights & Features•••••••

Universal AC input voltage range (85Vac – 264Vac)
Low Inrush Current / Low Leakage Current
High efficiency and PF factor to conserve energy
Conforms to harmonic current IEC/EN 61000-3-2, Class A
Conformal coating on PCBA to protect against chemical anddust pollutants
Versatile configuration options: Open Frame, L Frame,
Enclosed
Long life capacitors

Safety Standards

CB Certified for worldwide use

Model Number:
Unit Weight:

PJ-24V50W □NAOpen Frame: 0.16 kg (0.35 lb)
Enclosed: 0.28 kg (0.62lb)
Dimensions (L x W x D): Open Frame:
132 x 50 x 26.6 mm(5.20 x 1.97 x 1.05 inch)
Enclosed:
162 x 60 x 36 mm(6.38 x 2.36 x 1.42 inch)

General Description

The PJ series of Open Frame Power Supply comes with universal AC input at 85Vac to 264Vac. Other features include low leakage /Inrush current and conformal coating on the PCBAs to provide protection against dust and chemical pollutants. The built-in active PFC
provides PF > 0.97 and fulfills Harmonic Current Emission according to IEC/EN 61000-3-2. The PJ series is certified for EMC standards
according to EN 55011 for industrial, scientific and medical (ISM) radio-frequency equipment and EN 55032 for Industrial Technology
Equipment (ITE) radio-frequency equipment and EMS according to EN 55024. In addition, the detachable input and output connectors
are from JST and only recognized Japanese capacitors are used.
Metal chassis and case cover are available as options for different installation preferences. The PJ series conforms to major internationalsafety standards according to EN/UL 60950-1 standards and are fully compliant with RoHS Directive 2011/65/EU for environmentalprotection.

Model Information
PJ Open Frame Power Supply
Model Number

Input Voltage Range

Rated Output Voltage

Rated Output Current

PJ-24V50W □NA

85-264Vac

24Vdc

2.10A

Model Numbering
CC CodePJ –24V

PJ Series

Output Voltage Output Power

150W

□N

Product TypeB - Open Frame
L - L Frame
C - Enclosed

Remote ON/OFF Function Delta Standard
N - No Remote ON/OFFAll parameters are specified at 25°C ambient and AC input unless otherwise indicated.
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ATECHNICAL DATASHEETPJ Open Frame Power Supply
24V 50W 1 Phase / PJ-24V50W□NASpecifications
Input Ratings / Characteristics
Nominal Input Voltage

100-240Vac

Input Voltage Range

85-264Vac

Nominal Input Frequency

50-60Hz

Input Frequency Range

47-63Hz

Input Current

0.65A typ. @ 100Vac, 0.35A typ. @ 200Vac

Efficiency at 100% Load

84.5% typ. @ 100Vac, 87.0% typ. @ 200Vac

Max Inrush Current (Cold Start)

15A typ. @ 100Vac, 30A typ. @ 200Vac

Power Factor Correction at 100% Load

0.98 typ. @ 100Vac, 0.97 typ. @ 200VacLeakage Current

0.1mA @ 100Vac, 0.2mA @ 240Vac

Output Ratings / Characteristics*
Nominal Output Voltage

24Vdc

Factory Set Point Tolerance

24Vdc ± 1% (initial set point tolerance from factory)

Output Voltage Adjustment Range

21.6-26.4Vdc

Output Current

2.10A (50.4W max.)

Output Power

50.4W

Line Regulation< 96mV

Load Regulation< 150mV

Ripple (20MHz)< 120mVpp @ 0°C to 50°C, < 160mVpp @ -10°C to 0°C

Ripple Noise (20MHz)< 150mVpp @ 0°C to 50°C, < 180mVpp @ -10°C to 0°C

Start-up Time

500ms typ. @ 100Vac (100% load)

Hold-up Time

20ms typ. @ 100Vac (100% load)

Dynamic Response(Overshoot & Undershoot O/P Voltage)± 5% @ 0-50% load and 50-100% load

Start-up with Capacitive Loads

8,000µF Max*For power de-rating from 50°C to 70°C, see power de-rating on page 3

MechanicalCase Cover / Chassis

SGCCDimensions

Open Frame 132 x 50 x 26.6 mm (5.20 x 1.97 x 1.05 inch)
Enclosed 162 x 60 x 36 mm (6.38 x 2.36 x 1.42 inch)

Unit WeightOpen Frame
Enclosed

0.16kg (0.35 lb)
0.28 kg (0.62 lb)

Indicator

NACooling System

Convection

Terminal

Input

JST B3P5-VH (LF)(SN)

OutputJST B4P-VH (LF)(SN)Wire

AWG 22-18

Noise (1 Meter from power supply)Sound Pressure Level (SPL) < 25dBA

2All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)

TECHNICAL DATASHEETPJ Open Frame Power Supply
24V 50W 1 Phase / PJ-24V50W□NAEnvironment
Surrounding Air Temperature

Operating-10°C to +70°C

Storage-25°C to +75°C

Power De-rating
Operating Humidity

Refer to Engineering Data Fig.1.1~Fig.1.5
on Page7~9
5 to 95% RH (Non-Condensing)Operating Altitude

0 to 5,000 Meters (16,400 ft)

Shock Test
Vibration

Non-Operating

IEC 60068-2-27, 196.1m/S² (20G),11ms, once along X,Y, and Z axis

Operating

IEC 60068-2-6, 10Hz to 55Hz @ 19.6m/S² (2G); 3 min
period, 60 min per axis for all X, Y, Z direction

Over Voltage Category

IIPollution Degree

2Protections
Overvoltage

27.6-33.6V, Latch Mode

Overload / Overcurrent> 105% of rated load current, Hiccup Mode,
Non-Latching (Auto-Recovery)

Over Temperature

Latch Mode

Short Circuit

Hiccup Mode, Non-Latching(Auto-Recovery when the fault is removed)

Internal Fuse at L pin

T2.5AH

Protection Against ShockClass I with PE* connection*PE: Primary EarthReliability Data
MTBF

> 200,000 hrs. as per JEITA RCR-9102B

Expected Cap Life Time

10 years (115Vac, 50% load @ 40°C)

Safety Standards / Directives
Safety Entry Low Voltage
Electrical Safety

SELV (EN 60950-1)
TUV Bauart
UL/cUL recognized
CB scheme

EN 60950-1
UL 60950-1 and CSA C22.2 No. 60950-1(File No. E131881)
IEC 60950-1

CE

In conformance with EMC Directive 2014/30/EU andLow Voltage Directive 2014/35/EC

Material and Parts

RoHS Directive 2011/65/EU Compliant

Galvanic Isolation

3Input to Output

3.0KVac

Input to Ground

2.0KVacOutput to Ground

0.5KVac

All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)

TECHNICAL DATASHEETPJ Open Frame Power Supply
24V 50W 1 Phase / PJ-24V50W□NAEMC
Emissions (CE & RE)

CISPR 32, EN 55032, FCC Title 47: Class B

Immunity
Electrostatic Discharge

IEC 61000-4-2

Level 4 Criteria A1)
Air Discharge: 15kV
Contact Discharge: 8kV

Radiated Field

IEC 61000-4-3

Level 3 Criteria A1)
80MHz-1GHz, 10V/M with 1kHz tone / 80% modulation

Electrical Fast Transient / Burst

IEC 61000-4-4

Level 3 Criteria A1)
2kVSurge

IEC 61000-4-5

Level 3 Criteria A1)
Common Mode2): 2kV
Differential Mode3): 1kV

Conducted

IEC 61000-4-6

Level 3 Criteria A1)
150kHz-80MHz, 10Vrms

Power Frequency Magnetic Fields

IEC 61000-4-8

Criteria A1)
Magnetic field strength 30A/MeterVoltage Dips and Interruptions

IEC 61000-4-11

100% dip; 1 cycle (20ms); Self Recoverable

Low Energy Pulse Test (Ring Wave)

IEC 61000-4-12

Level 3 Criteria A1)
Common Mode2): 2kV
Differential Mode3): 1kV

Harmonic Current Emission

IEC/EN 61000-3-2, Class A

Voltage Fluctuation and Flicker

IEC/EN 61000-3-31) Criteria A: Normal performance within the specification limits
2) Asymmetrical: Common mode (Line to earth)3) Symmetrical: Differential mode (Line to line)

Block Diagram

4

All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)

TECHNICAL DATASHEETPJ Open Frame Power Supply
24V 50W 1 Phase / PJ-24V50W□NADimensions
Open Frame
L x W x D: 132 x 50 x 26.6 mm (5.20 x 1.97 x 1.05 inch)

L FrameL x W x D: 162 x 60 x 36 mm (6.38 x 2.36 x 1.42 inch)

Item Device Description

5Notes1

Input Connector

2

Output Connector

••

3

VR

4Chassis••Dimensions are in mm
For information on Mounting Torque, and I/O Connector and Housing, please refer
to Table 1 (Page 6).
For L Frame type: There are 6 threaded mounting holes and 5 normal mountingholes.
For Open Frame type: There are 4 normal mounting holes.

All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)

TECHNICAL DATASHEETPJ Open Frame Power Supply
24V 50W 1 Phase / PJ-24V50W□NAEnclosed
L x W x D: 162 x 60 x 36 mm (6.38 x 2.36 x 1.42 inch)

Item Device Description

Notes

1

Input Connector

2

Output Connector••

3VR4Cover•

5Chassis

Dimensions are in mm
For information on Mounting Torque, and I/O Connector and Housing, please referto Table 1 (Page 6).
For Enclosed type: There are 6 threaded mounting holes and 5 normal mountingholes.

Assembly & Installation
Assembly Reference■ Open Frame■ L Frame / Enclosed

For safety reasons, please ensure the mounted device is kept at ≥ 4mm (0.16 inch) safety distance at all sides from other components
and equipments. Please insert an insulation sheet between the system and product, if the safety distance is less than 4mm (0.16inch).
Use flexible cable (stranded or solid) of AWG No. 22-18. Please refer to Table 1 for the recommended Housing and Terminal.
Table 1

6Connector (Board Mounting)

Housing

Input (JST)B3P5-VH(LF)(SN)

VHR-5N

Output (JST)

B4P-VH(LF)(SN)

VHR-4NAll parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)

Terminal
SVH-21T-P1.1

TECHNICAL DATASHEETPJ Open Frame Power Supply
24V 50W 1 Phase / PJ-24V50W□NAMounting Orientation••••Any excessive twisting or bending may
damage the device’s PCB. Pleasehandle the device with care.
The device is not recommended to beplaced on low thermal conductive
surfaces. For example, plastics.
Prevent any foreign metal, particles or
conductors from entering the device
throughtheopenings
duringinstallation. It may cause: -Electric
shock; Safety hazard; Product failure.
The power supply must be mounted
by metal screws onto a groundedmetal
surface.
Itishighlyrecommended that the Earthterminal on the connector beconnected to the grounded metal
surface.

Engineering Data
Convection
Output Load De-rating VS Surrounding Air Temperature■ Open Frame / L Frame■ Enclosed

Fig.1.1 De-rating for Mounting Orientation A to F
> 50°C de-rate power by 2.5% / °C

Fig.1.2 De-rating for Mounting Orientation A to F
> 40°C de-rate power by 2.5% / °C

7All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)

TECHNICAL DATASHEETPJ Open Frame Power Supply
24V 50W 1 Phase / PJ-24V50W□NA
Forced Cooling (Air Velocity > 0.7m/s)
Output Load De-rating VS Surrounding Air Temperature■ Air Flow Direction■ Open Frame / L Frame■ EnclosedFig.1.3 De-rating for Mounting Orientation A to F
> 60°C de-rate power by 2% / °C

Fig.1.4 De-rating for Mounting Orientation A to F
> 50°C de-rate power by 2% / °C

Notes
1.
2.
3.
4.

8

Power supply components may degrade, or be damaged, when the power supply is continuously used outside the shaded region,refer to the graphs shown above.
If the output capacity is not reduced when the surrounding air temperature is more than the upper limit temperature, the device will
run into Over Temperature Protection. When activated, the output voltage will go into latch mode until the mains is reapplied andthe surrounding air temperature drops to its normal operating temperature.
Depending on the surrounding air temperature and output load delivered by the power supply, the device housing can be very hot!
If the device has to be mounted in any other orientation, please contact info@deltapsu.com for more details.

All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)

TECHNICAL DATASHEETPJ Open Frame Power Supply
24V 50W 1 Phase / PJ-24V50W□NAOutput Load De-rating VS. Input Voltage■ No output power de-rating for the input voltage
range from 90Vac to 264VacFig.1.5 De-rating for Mounting Orientation A to F
< 90Vac de-rate power by 2% / VFunctions
Start-up TimeThe time required for the output voltage to reach 90% of its final steady state set value, after the input voltage is applied.

Rise TimeThe time required for the output voltage to change from 10% to 90% of its final steady state set value.

Hold-up TimeTime between the collapse of the AC input voltage, and the output falling to 95% of its steady state set value.
■ Graph illustrating the Start-up Time, Rise Time, and Hold-up Time

9All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)

TECHNICAL DATASHEETPJ Open Frame Power Supply
24V 50W 1 Phase / PJ-24V50W□NADynamic Response

Short Circuit Protection (Auto-Recovery)

The power supply output voltage will remain within ±5% of its
steady state value, when subjected to a dynamic load from 0 100%of its rated current.

The power supply’s output OLP/OCP function also provides
protection against short circuits. When a short circuit is applied, theoutput current will operate in “Hiccup mode”, as shown in theillustration in the OLP/OCP section on this page. The power supply
will return to normal operation after the short circuit is removed.

Overload & Overcurrent Protections (Auto-Recovery)
The power supply’s Overload (OLP) and Overcurrent (OCP)
Protections will be activated when output current exceeds 105% ofIO (Max load). In such occurrence, the VO will start to droop andonce the power supply has reached its maximum power limit, theprotection is activated and the power supply will go into “Hiccupmode” (Auto-Recovery). The power supply will recover once thefault condition of the OLP and OCP is removed and IO is back within
the specifications.

Inrush Current
Inrush current is the peak, instantaneous, input current measured
and, occurs when the input voltage is first applied. For AC input
voltages, the maximum peak value of inrush current will occur
during the first half cycle of the applied AC voltage. This peak value
decreases exponentially during subsequent cycles of AC voltage.

Additionally, if the IO is <105% but >100% for a prolong period oftime (depending on the load), the Over Temperature Protection(OTP) will be activated due to high temperature on criticalcomponents. The power supply will then go into latch mode until
the fault is removed and the mains is reapplied.

Over Temperature Protection (Latch Mode)

Overvoltage Protection (Latch Mode)
The power supply’s overvoltage circuit will be activated when its
internal feedback circuit fails. The output voltage shall not exceed
its specifications defined on Page 3 under “Protections”. Powersupply will latch off, and require removal/re-application of input AC
voltage in order to restart. The power supply should be latch.

10As described in load de-rating section, the power supply also has
Over Temperature Protection (OTP). In the event of a higher
operating temperature at 100% load; or, when the operating
temperature is beyond what is recommended in the de-rating
graph, the OTP circuit will be activated. When activated, power
supply will latch off, until the surrounding air temperature drops toits normal operating temperature or the load is reduced asrecommended in the de-rating graph. Removal/re-application of
input AC voltage will then be required in order to restart.

All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)

TECHNICAL DATASHEETPJ Open Frame Power Supply
24V 50W 1 Phase / PJ-24V50W□NAOthers
Delta RoHS Compliant
Restriction of the usage of hazardous substances
The European directive 2011/65/EU limits the maximum impurity level of homogeneous materials such as lead,mercury, cadmium, chrome, polybrominated flame retardants PBB and PBDE for the use in electrical andelectronic equipment. RoHS is the abbreviation for “Restriction of the use of certain hazardous substances inelectrical and electronic equipment”.
This product conforms to this standard.

Conformal Coating
The Protective Coating Technology
Delta Electronics Group has designed the perfect dipping technique which penetrates everywhere including underdevice, and prevents leakage. The conformal coating dipping can be applied to PCBs or circuit board. The coatingpreserves the performance of precision electronic primarily by preventing ionizable contaminants such as salt
from reaching circuit nodes, where the material slumps around sharp edges. This can be a problem especially inhighly conversing atmosphere.

Attention
Delta provides all information in the datasheets on an “AS IS” basis and does not offer any kind of warranty through the information forusing the product. In the event of any discrepancy between the information in the catalog and datasheets, the datasheets shall prevail(please refer to www.DeltaPSU.com for the latest datasheets information). Delta shall have no liability of indemnification for any claim oraction arising from any error for the provided information in the datasheets. Customer shall take its responsibility for evaluation of using
the product before placing an order with Delta.
Delta reserves the right to make changes to the information described in the datasheets without notice.

11All parameters are specified at 25°C ambient and AC input unless otherwise indicated.
www.DeltaPSU.com (November 2018, Rev. 04)