MIL-DTL-8834/1A
REQUIREMENTS:
Design and construction: See figures 1 and 2. For switches with center-on circuits, the nonteasable
requirement is not applicable; delayed action of the toggle lever may cause circuit to close or open before snap
action occurs.
Switching characteristics: See table I. Direction of the movement of internal mechanism is opposite to the
direction of the toggle lever movement.
Weight:
.469 bushing, standard lever: .06 pound maximum.
.469 bushing, locking lever: .074 pound maximum.
.250 bushing: .035 pound maximum.
Strength of terminals: Applied force shall be 5 pounds minimum normal to the mounting plane and 2 pounds
minimum in other planes.
Strength of actuating-lever pivot and lever stop:
Switches with .250 inch mounting bushing: Applied force shall be 6 pounds.
Dielectric withstanding voltage:
At atmospheric pressure: For switches with center-on circuits, dielectric withstanding test voltage shall be
1,200 V rms at sea level.
At reduced barometric pressure: Switches shall be tested in accordance with MIL-STD-202, method 105,
test condition B (50,000 feet).
Shock: Method I (100 g's, sawtooth).
Sealing: Test in accordance with MIL-STD-202, test method 112, test condition B, except use tap water instead
of silicone oil and an absolute pressure of 2 ±0.5 inches of mercury instead of 1.5 inches maximum. A
continuous stream of bubbles is defined as 2 or more bubbles present in the water at the same time and
originating from the same location on the switch.
Electrical endurance: Altitude tests are to be conducted while at a pressure equivalent of 50,000 feet.
Resistive loads:
28 V dc: 5 amperes.
115 V ac, 400 Hz: 3 amperes.
115 V ac, 60 Hz: 2 amperes at room temperature and pressure only.
Inductive loads:
28 V dc: 1 ampere with time constant of .020 ±.002 seconds.
115 V ac, 400 Hz: 2 amperes.
115 V ac, 60 Hz: 1 ampere at room temperature and pressure only.
Electrical life, low level switching: contact resistance shall not exceed 50 ohms on any single contact closure.
Contact load: Each switch contact shall make, carry, and break a resistive load of 25 microamperes
maximum at an open circuit voltage of 5 millivolts dc maximum.
Monitoring circuit: Monitoring equipment shall provide a record of the number of cycles and shall record
failures or discontinue the test if a failure occurs. Each contact closure shall be monitored.
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