MIL-PRF-8805/77H
REQUIREMENTS:
Dimensions and configurations: See figure 1.
Enclosure design: 1 (unsealed) (-001 and 002).
1 (unsealed with terminal flux seal) (-003 and 004)
Temperature characteristic: 2 (-65°C to +125°C).
Shock type: M (100 g, test condition I, method 213 of MIL-STD-202).
Vibration grade: 2 (10 Hz to 2,000 Hz swept sinusoidal, 15 g peak).
Weight: .25 ounce maximum.
±20 percent variation from specified values acceptable after test.
Operating characteristics:
Free position
.436 inch.
Actuating force
1.5 pounds maximum.
Overtravel
.012 inch minimum.
.025 ±.010 inch.
Movement differential
Pole transfer coincidence .002 inch maximum (-003 and 004).
.396 ±.010 inch.
Operating point
Terminal strength: 5 pounds, when applied perpendicular to the longitudinal axis of the terminals;
9 pounds when applied in other directions
Terminal flux sealing: M8805/77-003 and 004
Test condition:
Switches shall be tested as follows: For each switch circuit, measure and record initial contact
resistance. Place switches, terminal down, into shallow pan. Pour flux, in accordance with type
symbol B of IPC J-STD-004, specific gravity 0.896, at 80°F ±5°F, into a pan without splashing until
level of flux is approximately .0625 inch above the bottom of the switch case, and let switches soak
for 10 minutes. Remove switches from flux and immediately place into oven for drying at 175°F
±10°F for two hours. After switches have cooled to room temperature, visually examine the
actuator area for evidence of flux and repeat initial measurements. Contact resistance shall not
increase by more than 10 milliohms over initial readings.
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