MIL-PRF-27/88A
REQUIREMENTS: (When numbers in parentheses, such as (1.-3) are used, they indicate the winding and the
extreme terminals of the winding.)
Electrical ratings:
Inductance (1-2): 72µH minimum.
Voltage (1-2): 0.1 volts rms, 10 kHz.
Power: 0.3 watt.
Current (1-2): 1 ampere dc.
DC resistance(1-2): 0.3 ohm dc, maximum.
Working voltage: 50 volts maximum.
Design and construction:
Dimensions and configuration: See figure 1.
Duty cycle: Continuous.
Case: Encapsulated.
Material: Epoxy.
Altitude: 70,000 feet, maximum.
Terminals: Solid wire lead type, tinned soft copper.
Weight: 3.2 grams.
Operating temperature range: -55C to +130C.
Terminal strength: MIL-STD-202, method 211, test condition A, 2 pounds.
Dielectric withstanding voltage:
At sea level: 100 volts rms.
At reduced barometric pressure: 50 volts rms.
Electrical characteristics:
Inductance: With 0.1 volt rms, 10 kHz across, and 1 ampere dc applied to (1-2) the inductance shall be
72 µH minimum.
DC resistance at 25°C: 0.3 ohm across (1-2) maximum.
Self resonant frequency: 2.5 MHz minimum.
Temperature rise: 30°C maximum, with 0.1 volt rms, 10 kHz, 1 ampere dc applied to (1-2) at an ambient
temperature of 100°C.
Marking location: See figure 1.
Part or Identifying Number (PIN): M27/88-01.
2
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