The EOS Power Economical Green Series was designed with the value focused customer in mind. The WLT Green Series offers market leading specifications in industry standard footprints at very competitive price levels.

  • 3 x 5 x 1.5 inches
  • Wide range AC input
  • Remote sense
  • Power Good
  • Remote On/Off
  • EMI class B.
  • CE marked to LVD.
  • Class I
  • Now IEC/EN/UL62368-1 CompliantNEW
  • Approved with metal enclosures/accessories.

WLT300-CK Series

Input Specifications
Input Voltage 90-264 VAC/120-390 VDC, Universal                                                      
Input Frequency 47-63 Hz
Input Current 3.2 A max @ 120 VAC AND 1.65 A max @ 230 VAC
Inrush Current 35 A max @ 120 VAC AND 65 A max @ 230 VAC
Output Specifications
Output Voltage From 5 V to 48 V (Refer model number matrix table)
Output Power 200 to 325 W
Hold-up Time 120 VAC: 10 ms AND 230 VAC: 10 ms
Line Regulation +/-0.5 %
Load Regulation +/-2.0 %
Minimum Load 0.0 A
Transient Response max excursion 10 %; 50 % to 100 % load at 0.1A/uS slew rate, 50 % duty cycle, 50/60Hz, recovery time < 5 ms.
Ripple1 2.0 % max for all outputs.
Rise Time < 100 ms
Set Point Accurarcy +/-1 %
Output Voltage Adjustment +/-3 %
Over Current Protection 110 to 150 %
Over Voltage Protection 110 to 150 %, auto recovery
Short Circuit Protection Short term, auto recovery
Over Temperature Protection 110°C primary heat sink, auto recovery
Cooling Convection: up to 140W max (5V model), Up to 200W max (12V, 15V, 24V, 30V and 48V models)
With 300LFM : up to 200W max (5V model), Up to 300W max (12V and 15V models), Up to 325W max (24V, 30V and 48V models)
Refer de-rating curves to determine output power over the entire operating temperature range.
General Specifications
Efficiency 120 VAC: 88 % typical 230 VAC: 92 % typical                                                                               
Power Factor 120 VAC: 0.98 AND 230 VAC: 0.95
Isolation Voltage Input to Output 4000 VAC/VDC
MTBF 1.77m Hours, Telcordia -SR332-issue 3
Switching Frequency PFC converter: Fixed, 80 kHz typical
Resonant converter: Variable, 35-250 kHz; 90 kHz typical
Leakage Current 120 VAC: < 125 μA AND 230 VAC: < 250 μA
Dimensions 3 x 5 x 1.5 inches
(76.2 x 127 x 38 mm)
Weight 450 gm
Environmental Specifications
Operating Temperature -20 to +70°C, refer derating curve, -20 to 0°C, start-up is guaranteed                                                                 
Storage Temperature -40 to +85°C
Relative Humidity 95 % Rh, non condensing
Altitude Operating: 10,000 ft.; Non-operating: 40,000 ft
Model Number Power Supply Unit &
its Installation Type
Power Voltage Max. Load2 (Convection)
Max. Load2
(300 LFM)
LFWLT300-1000-CKIn CK cover Kit98 W5 V19.6 A-
LFWLT300-1000In Open Frame200 W5 V28.0 A40.0 A
LFWLT300-1000-LWith L Bracket200 W5 V28.0 A40.0 A
LFWLT300-1000-BWith Base Plate200 W5 V28.0 A40.0 A
LFWLT300-1000-UWith U channel200 W5 V28.0 A40.0 A
LFWLT300-1001-CKIn CK cover Kit140 W12 V11.67 A-
LFWLT300-1001In Open Frame300 W12 V16.67 A25.0 A
LFWLT300-1001-LWith L Bracket300 W12 V16.67 A25.0 A
LFWLT300-1001-BWith Base Plate300 W12 V16.67 A25.0 A
LFWLT300-1001-UWith U channel300 W12 V16.67 A25.0 A
LFWLT300-1002-CKIn CK cover Kit140 W15 V9.33 A-
LFWLT300-1002In Open Frame300 W15 V13.33 A20.0 A
LFWLT300-1002-LWith L Bracket300 W15 V13.33 A20.0 A
LFWLT300-1002-BWith Base Plate300 W15 V13.33 A20.0 A
LFWLT300-1002-UWith U channel300 W15 V13.33 A20.0 A
LFWLT300-1003-CKIn CK cover Kit140 W24 V5.83 A-
LFWLT300-1003In Open Frame325 W24 V8.33 A13.54 A
LFWLT300-1003-LWith L Bracket325 W24 V8.33 A13.54 A
LFWLT300-1003-BWith Base Plate325 W24 V8.33 A13.54 A
LFWLT300-1003-UWith U channel325 W24 V8.33 A13.54 A
LFWLT300-1004-CKIn CK cover Kit140 W48 V2.92 A-
LFWLT300-1004In Open Frame325 W48 V4.17 A6.77 A
LFWLT300-1004-LWith L Bracket325 W48 V4.17 A6.77 A
LFWLT300-1004-BWith Base Plate325 W48 V4.17 A6.77 A
LFWLT300-1004-UWith U channel325 W48 V4.17 A6.77 A
LFWLT300-1005-CKIn CK cover Kit140 W30 V4.67 A-
LFWLT300-1005In Open Frame325 W30 V6.67 A10.83 A
LFWLT300-1005-LWith L Bracket325 W30 V6.67 A10.83 A
LFWLT300-1005-BWith Base Plate325 W30 V6.67 A10.83 A
LFWLT300-1005-UWith U channel325 W30 V6.67 A10.83 A
LFWLT300-CK metal cover kit accessory available.
General Notes:
  • Peak current rating on main output is 120 % of max., lasting < 30 s with a maximum 10 % duty cycle.
  • Combined output power of main output, fan supply and standby supply shall not exceed max. power rating.
  • Standby output voltage tolerance including set point accuracy, line and load regulation is +/-10 %. Ripple and noise is less than 5 %.
  • Fan supply output voltage tolerance including set point accuracy, line and load regulation is +/-30 % and needs min. 1 % load on main output to be within regulation band. Ripple and noise is less than 10 %.
  • Specifications are for nominal input voltage, 25°C unless otherwise stated.
  • PSU is supplied with J3 housing, pin-1 and pin-2 shorted to enable main output without remote on/off feature.
  • Derate output power linearly to 80% from 90 VAC to 80 VAC input.
  • Power good signal cannot be used as a current source. Internal pull up resistor from PG signal to 5V is 10K. It is recommended to use external transistor if intended to source current.
  • The de-rating curves are valid for input voltages of 115VAC to 264 VAC. Below 115VAC to 90VAC the convection rating is 180 Watts maximum.
  • When used in Cover Kit, de-rate output power to 70 % under all operating conditions.
  1. 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.
Power Good Signal TTL signal goes high after main output reaches 90% of its final set value, delay is 0.1 to 0.5 s.
Remote Sense Compensates for 200 mV drop.
Remote on/off To turn-on PSU short remote pin to ground.
Derating Curve
WLT300 Convection load: 140W up to 40 °C
De-rate between 40 °C @ 1.67 % per °C

Forced air cooled load : 200W up to 40°C
De-rate above 40 °C @ 1.67 % per °C
WLT300 Convection load: 200W up to 40 °C
De-rate between 40-50 °C @ 1 % per °C
De-rate between 50 °C @ 2.5 % per °C

Forced air cooled load : 300 W up to 50°C
De-rate above 50 °C @ 2.5 % per °C
WLT300 Convection load: 200W up to 40 °C
De-rate between 40-50 °C @ 1 % per °C
De-rate between 50 °C @ 2.5 % per °C

Forced air cooled load : 325 W 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 3, 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 62368-1:2014, EN 62368-1:2014;A11 , UL 62368-1 and CAN/CSA C22.2 No. 62368-1-14
Approval Agency Nemko, UL
Safety File Number(s) CB Certificate No: NO107429, Nemko Certificate No: P19223724, UL Certificate Number: 20191011-E150565
CB Class - I Certificate
Nemko Class - I Certificate
UL Class - I Certificate
Mechanical Specifications
AC Input Connector (J1) Molex: 26-60-4030 or equivalent
Mating: 09-50-3031; Pins: 08-50-0106
Pin 1
Pin 2
DC Ouput Connector (J2) 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
Fan Connector (J3) Molex: 22-23-2081 or equivalent
Mating: 22-01-2087, Pins: 08-50-0113
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
VFAN (+12 V/0.5 A)
VSTBY (+5 V/2 A, +/-5%)
Spade Connector
Molex: 19705-4301
Mating: 190030001
Mechanical Drawing
    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.
Certificate Standard Downloads
CB Class - I Certificate IEC 62368-1:2014
Nemko Class - I Certificate EN 62368-1:2014;A11
UL Class - I Certificate UL 62368-1 and CAN/CSA C22.2 No. 62368-1-14

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