MIL-DTL-55302/120B
REQUIREMENTS:
Design and construction:
Dimensions and configuration: See figure 1. This specification sheet describes the motherboard or
pin side of a metal shell two-piece edgeboard connector system. This system uses reverse gender
contacts; i.e., the live pin is recessed in the insulator with the static socket protruding from a shrouded
interface.
Material and finish:
Pin contact: Copper alloy. Gold plate in accordance with ASTM B488, type II, code C, class 1.27.
A suitable copper or gold underplate is permissible for adhesion.
Insulator: Diallyl phthalate in accordance with ASTM D5948.
Pin shell: Aluminum alloy electroless nickel in accordance with SAE-AMS-C-26074.
Keys: In accordance with MIL-DTL-55302/124.
Contact identification: Contact rows are identified by molded letters "A" and "B" in mating side of plug.
End contact numbers are marked on the side of the plug or are molded into the interface of the plug.
See figure 1 for further details.
Oversize pin exclusion test: Not applicable to reverse gender connectors.
Individual contact engaging and separation force: 8.0 ounces maximum engaging, 0.5 ounce minimum
separation. Contact resistance not to exceed 36 millivolts at 3 amps rated current.
Mating and unmating: The maximum mating force, in pounds, shall not exceed a value equal to
.6 times the number of contacts, and the unmating force, in pounds, shall be a minimum of .03 times
the number of contacts and shall not exceed the measured insertion force.
Current rating, maximum: 3 amperes per contact.
Contact retention: The contact retention shall exceed 5 pounds. The test shall be conducted by pulling
axially on the wire.
Contact connections: The pin contact (being recessed in the insulator) is normally connected to the live
side of the circuit.
Dielectric withstanding voltage:
Sea level: 800 volts rms, 60 hertz.
High altitude (70,000 feet): 200 volts rms, 60 hertz.
Low level circuit: The low level circuit resistance shall not exceed 20 milliohms.
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