MIL-PRF-27/27A
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:
(5-6-7) 11.8 volts, 400 Hz, 0.0035 ampere maximum.
Secondary voltage:
(1-2) 6 volts, .6 mA rms.
(3-4) 6 volts, .6 mA rms.
Working voltage:
(5-6-7) 18 volts maximum.
(1-2) (3-4) 18 volts maximum.
Design and construction:
Dimensions and configuration: See figure 1.
Duty cycle. Continuous.
Case: Encapsulated.
Material: Diallyl phthalate, glass filled.
Terminals: Pin type, copper clad, steel, tinned, copper weld.
Terminal height: .25 inch, minimum.
Terminal strength: Method 211, MIL-STD-202, test condition A, 2.0 pounds.
Dielectric withstanding voltage (at sea level): 50 volts rms.
Electrical characteristics:
No load: With 11.8 volts, 400 Hz across (5-6-7), current in (5-6-7) shall not exceed 3 mA and the
power in (5-6-7) shall not exceed 20 milliwatts.
Voltage across (1-2) and (3-4) shall be 6 volts, respectively.
Rated load: With 11.8 volts, 400 Hz; .0035 ampere, maximum across (5-6-7).
Voltage across (1-2) and (3-4) shall be 6 volts, respectively.
Shaft angle transformation accuracy: 5 minutes of arc synchro input to resolver output.
Temperature rise: 5°C maximum.
Marking location: See figure 1.
Part or Identification Number (PIN): M27/27-01.
2
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