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.

  • 40 W convection cooled rating.
  • Small 4.0”x2.0”x1.2” inch form factor.
  • High efficiency > 85 %.
  • Single to triple outputs.
  • Low conducted and radiated noise.
  • No Load Power< 0.3 W
  • Class I & Class II options.
  • Cover Kit accessory available.
  • Meets standard IEC60601-1-2 : 2014 (4th Edition)..

Input Specifications
Input Voltage 90-264 V, Universal                                                                                                
Input Frequency4 47-400Hz
Input Current 0.85 A max @ 120 VAC AND 0.45 A max @ 230 VAC
No Load Power < 0.3W for single output models
< 0.5W for multi output models
Inrush Current 30 A max @ 120 VAC AND 60 A max @ 230 VAC
Output Specifications
Output Voltage From 5 V to 58 V (Refer model number matrix table)    
Output Power 40 W
Hold-up Time >10 ms @ 120 VAC typical
Line Regulation +/-0.3 %
Load Regulation V1: +/-0.5 %; V2 & V3: +/-5 %
Minimum Load Refer model number matrix table.
Transient Response max excursion 10 %; 50-100 % step load change at 0.1A/uS slew rate, 50 % duty cycle, 50/60Hz, recovery time < 5 ms.
Ripple1 Refer model number matrix table.
Rise Time < 100 ms
Set Point Tolerance V1: +/-3 %; V2 & V3: +/-5 %
Output Voltage Adjustment V1:+/- 10 %
Over Current Protection 130 % typical above rating
Over Voltage Protection 130 % typical for V1 only
Short Circuit Protection Short term, auto recovery
Cooling Convection
General Specifications
Efficiency5 120 VAC: 85 % typical AND 230 VAC: 85 % typical                                                                  
Isolation Voltage Min. 4242 VDC between input to output
MTBF 1.87m Hours, Telcordia -SR332-issue 3
Switching Frequency Approximately 67 kHz
Leakage Current 120 VAC: < 500 μA AND 230 VAC: < 1000 μA
Dimensions 4.0 x 2.0 x 1.2 inches
(101.6 x 50.8 x 30.48 mm)
Weight 150 gm approx
Environmental Specifications
Operating Temperature -20 to 70°C, refer derating curve,-20 to 0°C,startup is guaranteed                                                                 
Storage Temperature -40 to +70°C
Relative Humidity 95 % Rh, non condensing
Altitude Operating: 10,000 ft.; Non-operating: 40,000 ft
Model Number Voltage Max.Load2 Min. Load5 Ripples3
LFWLT40-1000V1=5.1 V8.0 A0.00 A1 %
LFWLT40-1001V1=12 V3.5 A0.00 A1 %
LFWLT40-1002V1=15 V2.7 A0.00 A1 %
LFWLT40-1003V1=24 V1.7 V0.00 A1 %
LFWLT40-1004V1=48 V0.83 V0.00 A1 %
LFWLT40-3000V1=5.2 V, V2=12.5 V,
V3=-12.8 V
V1=6.0 A, V2=2.0 A,
V3=0.5 A
V1=0.5 A, V2=0.1 A,
V3=0.0 A
1 %
LFWLT40-3001V1=5.2 V, V2=23.8 V,
V3=-12.8 V
V1=6.0 A, V2=1.0 A,
V3=0.5 A
V1=0.5 A, V2=0.1 A,
V3=0.0 A
1 %
LFWLT40-3002V1=5.2 V, V2=15 V,
V3=-15 V
V1=6.0 A, V2=1.5 A,
V3=0.5 A
V1=0.5 A, V2=0.1 A,
V3=0.0 A
1 %
LFWLT40-3003V1=3.3 V, V2=5.2 V,
V3=-12.8 V
V1=6.0 A, V2=3.0 A,
V3=0.5 A
V1=1.0 A, V2=0.1 A,
V3=0.0 A
V1=1.5 %,
V2, V3=1 %
LFWLT60-CK metal cover kit accessory
General Notes:
  • Specifications are for nominal input voltage, 25°C and max. load unless otherwise stated.
  • Derate output power linearly to 80% from 90 VAC to 80 VAC input.
  • Please refer mechnical outline drawing for height of component above and below PCB for - 1xxx and 3xxx.
  • Class II version available. Add "-2" suffix at the end of the Model Number to Order. Enquire with EOS Sales Rep before Order.
  1. Ripple is peak to peak with 20 MHz bandwidth and 10 μF (Tantalum capacitor) in parallel with a 0.1 μF capacitor at rated line voltage and load ranges.
  2. Min Load specified to meet cross regulation.
  3. Maximum current per output channel. Do not exceed total output power rating.
  4. Safety approved 47-63 Hz.
  5. For WLT40-3003 efficiency is 75 % typical.
Derating Curve
De-rate linearly from 100 % at 50°C to 50 % at 70°C
Parameter Conditions/Description Criteria
Conducted Emissions EN55032-B, CISPR22-B, FCC PART15-B Pass
Radiated Emissions EN 55032 B Pass
Input Current Harmonics EN 61000-3-2 Class A
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) IEC60950-1(ed.2), EN60950-1, UL60950-1 (2nd Edition),CSA C22.2 No. 60950-1 (2nd Edition), Class1 SELV
IEC 62368-1:2014 ,EN 62368-1:2014 ;A11
Approval Agency Nemko, UL, C-UL
Safety File Number(s) Class I UL: Certificate Number: E150565, Nemko: Certificate No: P13216531, CB Test Certificate No: NO72727
Nemko: Certificate No: P19223597, CB Test Certificate No: NO106818
Class II UL: Certificate Number: E150565, Nemko: Certificate No: P13216532, CB Test Certificate No: NO72729
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 or equivalent
Mating: 09-50-3031; Pins: 08-50-0106
Pin 1
Pin 2
DC Ouput Connector (J2) Tyco: 640445-6 or equivalent
Mating: 647402-6; Pins: 3-647409-1
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Signal Connector (J3) Molex: 22-23-2021 or equivalent
Mating: 22-01-2021
Pin 1
Pin 2
    Spade Connector
Molex: 19705-4301
Mating: 19003-0001
Mechanical Drawing

WLT40 - 1XXX

Mechanical Drawing

WLT40 - 3XXX

    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.

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