MIL-PRF-27/277B
REQUIREMENTS:
Electrical ratings:
Primary power level: 1 mW.
Working voltage: (1-3) 50 Vrms, maximum.
Primary current: 1 mA dc, 2.6 mA ac.
Primary impedance: (1-3) 150 ohms ct.
Secondary load impedance: (4-6) 150 ohms ct.
Secondary current: 2.6 mA ac.
Design and construction:
Dimensions and configuration: See figure 1.
Duty cycle: Continuous.
Terminals: Pin for printed circuit.
Material: Type D per MIL-STD-1276.
Diameter: 0.016 inch.
Length: 1.000 ±0.250 inch.
Weight: 2.4 grams.
Operating temperature range: -55°C to +105°C.
Altitude: 50,000 feet.
Terminal strength: MIL-STD-202, method 211, test condition A, 2 pounds.
Dielectric withstanding voltage:
At sea level: 200 Vrms.
At reduce barometric pressure: 100 Vrms.
Electrical characteristics:
Harmonic distortion: Total harmonic content of output 5 percent with .39 volts, 1 kHz and 1 mA dc
applied to (1-3), secondary (4-5) + (6-7) loaded with .15 kilohms.
No load (ct voltage balance only): With 1 volt, 1 kHz applied to 1-3, unbalance (4-5) and (5-6)
shall be 3 percent, maximum.
Self-resonant frequency: 100 kHz, minimum.
Frequency response: ±3 dB at 300 Hz to 3 kHz at ES = .78 V and load impedance of
ZS = 150 ohms and ZL = 150 ohms, reference frequency shall be 1 kHz.
Polarity: Additive, with terminals 3 and 4 connected.
Vibration, high frequency: MIL-STD-202, method 204, test condition B.
Part or Identification Number (PIN): M27/277-01.
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