MS21437H
REQUIREMENTS:
Design and construction: See figure 1. 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.
Unlocking force: 4 ±1 pounds.
Weight: .064 pound maximum.
Strength of terminals: Applied force shall be 5 pounds minimum normal to the mounting plane and 2 pounds minimum in other planes.
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, sawtooth) and method II (high impact). The switch shall be electrically and mechanically operative at the conclusion of the shock test, except there can be mechanical transfer of the contact mechanism at all levels when tested in accordance with method II.
Sealing: Toggle seal.
MS21437-(700 and 800 series): Method I (15 foot head of water). MS21437-(200 and 300 series): Method II (0.5 inch head of water).
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 second.
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.
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