MIL-PRF-27/26A
REQUIREMENTS: (When numbers in parentheses i.e. (1-2) are used, they indicate the winding and the extreme
terminals of the winding.)
Electrical ratings:
Primary voltage: (1-2) 115 volts, 400 Hz ±1 percent.
Secondary current: (3-4) 52 mA.
Secondary voltage: (3-4) 57.5 volts.
Working voltage: (3-4) 325 volts peak.
VA ratings: 3.0 volt-ampere.
Design, configuration, and physical dimensions: See figure 1.
Duty cycle: Continuous.
Case: Molded.
Material: Diallyl-phthalate (GDI-30F).
Terminals: Pin type, brass-hot solder dip.
Height: .25 inch (6.35 mm) maximum.
Weight: 47 grams, maximum.
Operating temperature range: -55°C to +170°C.
Altitude: 70,000 feet, maximum.
Terminal strength: MIL-STD-202, method 211, test condition A, 2 pounds.
Dielectric withstanding voltage:
At sea level: 910 volts rms.
At reduced barometric pressure (70,000 feet): 407 volts rms
Electrical characteristics:
No load: With 115 volts, 400 Hz across (1-2), the current in (1-2) shall not exceed
6.0 mA maximum.
Rated load: With 115 volts, 400 Hz across (1-2) and a 52 mA load in (3-4), the voltage across
(3-4) shall be 57.5 volts ±3 percent.
Efficiency: 75 percent minimum at rated load.
Temperature rise: 20C maximum.
Marking location: See figure 1.
Part or Identifying Number (PIN): M27/26-01.
2
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