MIL-T-27/98
REQUIREMENTS: (When numbers in parentheses, such as (1-3) are used, they indicate the winding and the extreme terminals of the winding. When the extreme terminals of the two windings are used, (4-7), the windings are connected in series, terminals 5 and 6 are connected.)
Electrical ratings:
Primary power level: 2 W, maximum; .1 W, minimum. Working voltage:
(1-3): 525 V, maximum. (4-5): 175 V, maximum. (6-7): 175 V, maximum.
Primary current: .020 ampere dc through terminal 2, .001 ampere dc, maximum unbalance. Primary impedance (1-3): 15,000 ohms ct.
Design and construction:
Dimensions and configuration: See figure 1. Duty cycle: Continuous.
Case: Metal encased.
Material: Steel.
Terminals: Solder terminals, No. 18 AWG.
Height: .375 (9.53 mm) +.000 -.188 (4.78 mm). Weight: .72 pound, maximum.
Operating temperature range: -55°C to +105°C. Altitude: 50,000 feet, maximum.
Life expectancy: 10,000 hours, minimum.
Terminal strength: MIL-STD-202, method 211, test condition A, 5.0 pounds. Dielectric withstanding voltage: MIL-STD-202, method 301
At sea level: 1,500 V rms.
At reduced barometric pressure: 500 V rms. Electrical characteristics:
Harmonic distortion: Not more than 1 percent with 173 V, 300 Hz across (1-3) and .020 ampere dc through terminal 2.
2
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