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Séries "WL" e "WWL"

WL Series
100 - 420 Watt Single Output Power Supply
WWL Series
48 - 60 Watt Dual Output Power Supply


3-phase, input linear power supply; single and dual output.


Meets MIL-STD-461A.



105-125 Vac, 380-420 Hz, three phase delta.  Wye configurations available (option-3).

Output (nominal):

5, 6, 12, 15, 24, 28 Vdc (single output). ±12, ±15 Vdc (dual output).


30% minimum, 50% typical.

Line Regulation:

Within 0.1%  or 20 mV (whichever is greater) for change from low line to high line with load constant.

Load Regulation:

Within 0.1% or 20 mV (whichever is greater) for change from no load to full load with line constant.

Auxiliary Output Tracking:

WWL Models. The negative output will track the positive output within 1% or 100 mV (whichever is greater) for all rated conditions.

Pard (Noise and Ripple):

0.02% or 5 mV rms (whichever is greater), 25 mV P-P at 25 MHz bandwidth.

Isolation Voltage:

750 Vdc, input to output; 750 Vdc, input to case; 200 Vdc, output to case.

Insulation Resistance:

50 Mohms between input and output, input and case, output and case, when measured at 50 Vdc.


Inputs and outputs are isolated. Either positive or negative side of output may be grounded.

Temperature Range:

Operating: -55°C to +85°C maximum, at center of the baseplate (-55°C to +100°C at 80% rated power). Storage: -65°C to +125°C, ambient.

Temperature Coefficient:

0.03% / °C maximum.

Input Transient Protection:

Unit will withstand 180 Vac for 0.1 second, in accordance with MIL-STD-704.

Load Transient Response:

Output voltage returns to regulation limits within 100 microsecond for auxiliary outputs after 50% change in load current for units supplying more than 10 A.

Load Transient Overshoot:

0.2% or 30 mV (whichever is greater) from nominal voltage set point.

Short Circuit Protection:

Completely protected against a short circuit of any duration. Output automatically restores to normal when overload is removed.

Remote Sensing:

Regulator monitors voltage directly at the load using extra "sensing" leads and compensates for a dc voltage drop up to 0.5 volt in the load leads (single output models only).


Units were designed and built to minimize EMI/EMC emissions, and comply with the requirements of MIL-STD-461A by virtue of their topology, construction and enclosure.


MTBF is calculated per MIL-HDBK-217D at 50°C baseplate temperature with maximum operating input voltage and maximum rated output power. The MTBF at ground benign environment is 164,406 hours.


Encapsulated and hermetically sealed to meet the environmental requirements of MIL-STD-810C, including altitude (to 1.3 inches of Hg), acceleration, vibration, shock and temperature altitude cycling.


Standard unit is provided with an input solder pin header and an output "hermetic seal" stud-type connector.

Weight (Lbs.):

2.4 - 7.7

Size (inches):

See Selection Chart (PDF)

WL Series case diagram

Model Numbering System

Model Series

Nominal Output Voltage

Header Type



Maximum Output Current







*WL is for single output, WWL is for dual output.

SELECTION CHART for listing of popular models, case sizes, pin outs and input currents.


A Option:

Special Connectors. A military-type hermetically sealed connector is provided in place of our standard input header. To order, replace the "D" in the model with "A".

E Option:

Severe Shock, Acceleration and Vibration. Enables all units to withstand 60g's shock, 50g's acceleration and 30g's vibration. To order, add "E" after "D" in the model number.

H Option:

Recentered Input Voltage. Changes input specifications to: 208 to 230 Vac.  Some derating may be required. To order, add an "H" after the "D" in the model number and indicate new input voltage range in parentheses after the model number.

L Option:

Remote Turn On/Off. Provides isolated terminals to turn output on/off with TTL logic signal. To order, add "L" after "D" in the model number.

R Option:

An adjustment potentiometer can be remotely located to adjust the output voltage. To order, add "R" after the "D" in the model number.

-ER Option:

Provides increased reliability by using higher levels of military grade components. To order, add "-ER" after the model number.

-1 Option:

Internal Overvoltage Protection. Provides a crowbar internal OVP. Input must be recycled to restore output. May inccrease case size. To order, add "-1" to the end of the model number.

-3 Option:

WYE Input. Changes input specifications from 3-phase Delta to 3-phase, 4-wire WYE. To order, add "-3" to the end of the model number.

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