WLP Blue Series offers the size conscious customer industry leading watts per cubic inch in height profiles ranging from 25 mm to 30 mm in industry standard footprints. The Blue Series allows customers shrink their applications without compromising on power, quality or functionality.

  • 5 x 3 x 1 Inches Form factor.
  • 350 Watts Forced Cooled & 200 Watts Convection Cooled
  • Efficiencies up to 94 %
  • -40°C to 70°C operating temperature*.
  • 12V/0.5A Fan Output, Thermal Shut-Down feature.
  • 2.56m Hours, Telcordia -SR332-issue 3 MTBF.
  • No Load Power < 0.5W.
  • Remote ON/OFFNEW
  • Now IEC/EN/UL62368-1:2018 (Ed 3.0) CertifiedNEW
  • IEC/EN61558 CompliantNEW*** (Suitable for Household and Similar electrical equipment’s certified under IEC/EN60335-1 standards)
  • Approved with metal enclosures/accessories
3 /s

WLP350-CK Series

Input Specifications
Input Voltage                 90-264 VAC/390 VDC, Universal (Derate from 100 % at 100V AC to 90 % at 90V AC)
Input Frequency 47-63 Hz
Input Current 3.6 A max @ 115 VAC and 1.8 A max @ 230 VAC
No Load Power less than 0.5W typical
Inrush Current 25 A @ 115 VAC; 45 A @ 230 VAC; 75 A @ 264 VAC
Output Specifications
Output Voltage From 12V to 58V (Refers model number matrix table)                                                            
Output Power up to 350W with 375 LFM, up to 200W Convection
Output Voltage Adjustment +/-3 %
Hold-up Time Full Load : 8 ms typical Convection Load : 14 ms typical
Line Regulation +/-0.5 %
Load Regulation +/-1.0 %
Minimum Load 0.0 A
Transient Response max excursion 5 %; 50-100 % step load change at 0.1A/uS slew rate, 50 % duty cycle, 50/60Hz, recovery time < 5 ms.
Ripple1 1.0 % max for all outputs.
Rise Time 55 ms typical
Set Point Tolerance +/-1 %
Over Current Protection >110 %, Hiccup mode / Auto Recovery
Over Voltage Protection 110 to 140 %, Hiccup mode / Auto Recovery
Short Circuit Protection Hiccup mode / Auto Recovery
Cooling 350W with 375 LFM forced air cooling at 100 to 264VAC
200W with natural convection cooling at 100 to 264VAC.
General Specifications
Efficiency 94%(48V,58V), 93%(24V,30V), 92%(12V,15V)                                                                                            
Isolation Voltage Input to Output – 4000 VAC medical applications.
Input to GND - 2500 VAC
MTBF 2.56m Hours, Telcordia -SR332-issue 3
Switching Frequency PFC – 70 to 130 KHz ,PWM – 50-80 KHz
Power Factor Exceeds 0.95 with Full Load
Leakage Current 300 uA Typical
Dimensions 5 x 3 x 1 inches
(127 x 76.2x 25.4 mm)
Weight 300 gm approx
Environmental Specifications
Operating Temperature - 40 to +70°C, (-40 to 0°C startup is guaranteed with spec deviation)2                                                        
Storage Temperature -40 to +85°C
Relative Humidity 5 % to 95 %, noncondensing
Altitude Operating: 16,000 ft.; Non-operating: 40,000 ft
Model Number Power Supply Unit &
its Installation Type
Power Voltage Max. Load
Max. Load (Convection)
(375 LFM)
LFWLP350-1X01-CKIn CK cover Kit126 W12 V10.5 A-
LFWLP350-13013In Open Frame

225 W

12 V

15 A

18.75 A
LFWLP350-1301-LWith L Bracket
LFWLP350-1301-BWith Base Plate
LFWLP350-1301-UWith U channel
LFWLP350-1001In Open Frame

300 W

12 V

15 A

25 A
LFWLP350-1001-LWith L Bracket
LFWLP350-1001-BWith Base Plate
LFWLP350-1001-UWith U channel
LFWLP350-1X02-CKIn CK cover Kit126 W15 V8.4 A-
LFWLP350-13023In Open Frame

270 W

15 V

12 A

18 A
LFWLP350-1302-LWith L Bracket
LFWLP350-1302-BWith Base Plate
LFWLP350-1302-UWith U channel
LFWLP350-1002In Open Frame

325 W

15 V

12 A

21.67 A
LFWLP350-1002-LWith L Bracket
LFWLP350-1002-BWith Base Plate
LFWLP350-1002-UWith U channel
LFWLP350-1X03-CKIn CK cover Kit140 W24 V5.83 A-
LFWLP350-1X03In Open Frame

350 W

24 V

8.33 A

14.60 A
LFWLP350-1X03-LWith L Bracket
LFWLP350-1X03-BWith Base Plate
LFWLP350-1X03-UWith U channel
LFWLP350-1X04-CKIn CK cover Kit140 W48 V2.92 A-
LFWLP350-1X04In Open Frame

350 W

48 V

4.17 A

7.30 A
LFWLP350-1X04-LWith L Bracket
LFWLP350-1X04-BWith Base Plate
LFWLP350-1X04-UWith U channel
LFWLP350-1X05-CKIn CK cover Kit140 W30 V4.67 A-
LFWLP350-1X05In Open Frame

350 W

30 V

6.67 A

11.67 A
LFWLP350-1X05-LWith L Bracket
LFWLP350-1X05-BWith Base Plate
LFWLP350-1X05-UWith U channel
LFWLP350-1X06-CKIn CK cover Kit140 W58 V2.39 A-
LFWLP350-1X06In Open Frame

350 W

58 V

3.42 A

6.04 A
LFWLP350-1X06-LWith L Bracket
LFWLP350-1X06-BWith Base Plate
LFWLP350-1X06-UWith U channel
For Screw Terminal version replace "X" above with "0" (examples: LFWLP350-1005)
For Header version replace "X" above with "3" (examples: LFWLP350-1005)
Add Suffix 'O' for Remote On/Off option (example: LFWLP350-1303-O)
  1. Ripple is peak to peak with 20 MHz bandwidth and 10 μF (Electrolytic capacitor) in parallel with a 0.1 μF capacitor at rated line voltage and load ranges.
  2. Combined output power of main output, fan supply shall not exceed max. Power rating.
  3. Fan supply output voltage tolerance including set point accuracy, line and load regulation is +/-10 % and Ripple and noise is less than 10 %.
  4. Specifications are for nominal input voltage, 25°C unless otherwise stated.
  5. Thermal shutdown feature : The power supply goes in hiccup mode when the temperature of PCB exceeds 110 °C (+/-10 °C).
  6. Output ripple can be more than 10 % of the output voltage.
  7. When used in Cover Kit, de-rate output power to 70 % under all operating conditions.
  8. Class II version available.Add "-II" suffix at the end of the Model Number to Order.
  9. For more information and pricing details, please contact our sales team.
Note: External Supply voltage can be changed with pre Information
Derating Curve
WLP350 derating curve of 12 v Convection load: 180W up to 50 °C
De-rate above 50 °C @ 2.5 % per °C

Forced air cooled load : 300W up to 50°C
De-rate above 50 °C @ 2.5 % per °C
WLP350 derating curve of 15 v Convection load: 180W up to 50 °C
De-rate above 50 °C @ 2.5 % per °C

Forced air cooled load : 325W up to 50°C
De-rate above 50 °C @ 2.5 % per °C
Derating Curve Note : Between -40 to 0°C startup is guaranteed with spec deviation3
WLP350 derating curve of 24v to 58v cover kit Convection load: 200W up to 50 °C
De-rate above 50 °C @ 2.5 % per °C

Forced air cooled load : 350W up to 50°C
De-rate above 50 °C @ 2.5 % per °C
WLP350 derating curve OF 15V Convection load: 126W up to 50 °C
De-rate above 50 °C @ 2.5 % per °C
WLP350 derating curve of 24v to 58v Convection load: 140W up to 50 °C
De-rate above 50 °C @ 2.5 % per °C
Parameter Conditions/Description Criteria
Conducted Emissions EN55032-B, CISPR22-B, FCC PART15-B Pass
Radiated Emissions EN 55032 A Pass
Level B with external core (King core K5B RC 25x12x15-M in input cable)
Input Current Harmonics EN 61000-3-2 Class D
Voltage Fluctuation and Flicker EN 61000-3-3 Pass
ESD Immunity EN 61000-4-2 Level 3, Criterion A
Radiated Field Immunity EN 61000-4-3 Level 3, Criterion A
Electrical Fast Transient Immunity EN 61000-4-4 Level 3, Criterion A
Surge Immunity EN 61000-4-5 Level 4, Criterion A
Conducted Immunity EN 61000-4-6 Level 3, Criterion A
Magnetic Field Immunity EN 61000-4-8 Level 3, Criterion A
Voltage dips, interruptions EN 61000-4-11 Criterion A & B
CE Mark Complies with LVD Directive
Safety Standard(s) IEC 62368-1:2018, IEC 61558-1:2005, IEC 61558-1:2005/AMD1:2009, IEC 61558-2-16:2009, IEC 61558-2-16:2009 /AMD1:2013
EN 61558-2-16:2009;A1, EN 61558-1:2005;A1
UL 62368-1 and CAN/CSA C22.2 No. 62368-1:19,
Approval Agency Nemko, UL, C-UL
Safety File Number(s) Class-I : UL : Certificate Number 20200430-E514578, Nemko: Certificate No. P20224626, CB Ref. Certificate No.: NO110346
CB Class - I Certificate
CB Class - II Certificate
Nemko Class - I Certificate
Nemko Class - II Certificate
UL Class - I Certificate
Mechanical Specifications
AC Input Connector (J1) Molex: 26-60-4030
Mating: 09-50-3031; Pins: 08-50-0106
Pin 1
Pin 2
Pin 3
DC Ouput Connector (J2) Option 1
(Screw Terminal)
6-32 inches Screw Pan HD
Mating: Designed to accept Ring Tongue Terminal AMP : 8-31886-1,
wherein one 16 AWG(max) wire can be crimped.
Note : One Ring Tongue Terminal with 16 AWG is recommended for current up to 11A only.
Use multiple tongue terminals with wire for more current.
Pin 1
Pin 2
V1 +VE
V1 -VE
DC Ouput Connector (J2) Option 2
(Molex Connector)
Molex: 26-60-4080
Mating: 09-50-3081; Pins: 08-50-0106
Pin 1,2,3,4
Pin 5,6,7,8
V1 +VE
V1 -VE
Aux (Fan) Output(J3) AMP :640456-2
Mating: 640440-2
Pin 1
Pin 2
Remote ON/OFF (J6) AMP :640456-2
Mating: 640440-2
Pin 1
Pin 2
+VE (External)
-VE (External)
EARTH (J4) Molex: 19705-4301
Mating: 19003-0001
Screw Terminal
Tyco Header
    General Notes: In case the PCB is mounted in a metal enclosure, using metal hardware ensure the following
  1. Stand off, used to mount PCB has OD of 5.4 mm max.
  2. Screws, used to fix PCB on stand off, have head dia of 6.0 mm max.
  3. Washer, if used, to have dia of 6.5 mm max.
Mechnical Drawing
WLP350 series with base Plate
Mechnical Drawing
WLP350 series with L bracket
Mechnical Drawing
WLP350 series with u Channel
Mechnical Drawing
WLP350 series with cover kit
Mechnical Drawing
WLP350 series with Remote on/off
Certificate Standard Downloads
CB Class - I Certificate IEC 62368-1:2018
IEC 61558-1:2005, IEC 61558-1:2005/AMD1:2009
IEC 61558-2-16:2009, IEC 61558-2-16:2009 /AMD1:2013
Nemko Class - I Certificate EN 61558-2-16:2009;A1
EN 61558-1:2005;A1
EN IEC 62368-1:2020;A11
UL Class - I Certificate UL 62368-1 and CAN/CSA C22.2 No. 62368-1:19
CB Class - II Certificate IEC 60950-1(ed.2);am1;am2
Nemko Class - II Certificate EN 60950-1:2006;A11;A1;A12;A2
UL Class - II Certificate UL 60950-1 and CAN/CSA C22.2 No. 60950-1-07

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