The LT-71/ LT-101 Series is a pulse width-modulated DC to DC converter that provides regulated power.

The converter transforms an unregulated 28 VDC to a regulated and fixed DC output.

The Model LT-71/ LT-101 Series is primarily designed to supply regulated fixed DC voltage to critical communication, navigation and digital equipment.


  • State of the art design for regulation and positive logic for output overvoltage protection.
  • Other voltage control range is available.
  • The Model LT-SERIES is serviceable, small and lightweight (33 watts per pound and 1.7 watts per cubic inch).
  • Designed to meet various applicable portions MIL-STD 704 notice 3, MIL-STD-202 and MIL-T-5422F class 1A.


Input Voltage: 28 VDC nom., 20 TO 40 VDC.
Output Voltage: See Table Below.
Regulation: 2% for line, 2% load and 2% temperature.
Output Ripple: 50 mVp-p.
Protection (Overload): Input current foldback and output current limits when overload exceeds approximately 125% of rating
Protection (Overvoltage): Output voltage is limited to approximately 125% of rating.
Temperature: -55°C to +71°C (sufficient cooling required @ +71°C ambient)
Altitude: 55,000 Feet.
Size: 2.3" H x 2. 4" W x 6.8" L.
5.7 cm H x 6 cm W x 17 cm L
Weight: 1.5 lbs. (683 grams).


Detail Specifications: LT-71 LT-71A LT-101A-BP31
Max VA Rating 112 112 100
Input Voltage (VDC) 26 to 40 26 to 40 20 to 40
Input Current (ADC)
@ 28 VDC In
4.7 4.7 4.2
Output Voltage (VDC) 14 14 0 to 28
Output Current (ADC) 8.0 8.0 3.6
Efficiency (%) 80 80 84



Model Mating Plug Receptacle
LT-71 MS3106A14S-5S-X MS3102A14S-5P-X
LT-71A KPT-06B-14-5S PT-02E-14-5P
LT-101A-BP KPT-06B-14-5S PT-02E-14-5P
LT-71B MS3106A14S-5S-X MS3102A14S-5P-X