MIL-PRF-62122E
continuous duty. Adapters shall be capable of carrying 300 A for a period of 15 minutes
continuous duty. There shall be no shorting or loss of continuity, burning, rupture or other
damage to the connectors or cables throughout the test. Smoking shall not be a cause for failures
provided performance is not impaired.
3.4.1.3 Current, overload. When tested (see 4.7.3.3), the cable assemblies, plugs and
receptacles shall be capable of carrying a current of 1000 A at 24 Vdc for a period of
360 seconds. Adapters shall be capable of carrying a current of 600 A dc for a period of
120 seconds continuous duty. There shall be no shorting or loss of continuity, burning, rupture
or other damage to the connectors or cables throughout the test. Smoking shall not be a cause for
failures provided performance is not impaired.
3.4.1.4 Dielectric withstanding voltage. When the plugs, receptacles and adapters are
tested (see 4.7.3.4), the insulation shall evidence no cracking, charring, burning, smoking,
shorting or other damage.
3.4.1.5 Contact resistance. When the plugs and receptacles are tested (see 4.7.3.5) the
voltage drop across the contacts of the mated connectors shall be no greater than 250 milli-volts
(mV) at 500 A. For adapters the average voltage drop shall not exceed 100 mV at 200 A dc for
either the positive or the negative circuits.
3.4.2 Environmental.
3.4.2.1 Waterproofness. When tested (see 4.7.4.1), the plugs shall evidence no leakage or
damage which would adversely affect performance. Subsequently, the plugs shall meet the
performance requirements of 3.4.1.2, 3.4.1.3, 3.4.1.4 and 3.4.1.5.
3.4.2.2 Corrosion resistance. When tested (see 4.7.4.2), the plugs, receptacles and
adapters shall show no evidence of corrosion that would adversely affect performance.
Subsequently, the plugs, receptacles and adapters shall meet the requirements of 3.4.1.5.
3.4.2.3 Resistance to petroleum products. When tested (see 4.7.4.3), the cable
assemblies, plugs, receptacles and adapters shall show no evidence of damage that would
adversely affect performance.
3.4.2.4 Mating. When tested at an ambient temperature of 77±15 degrees Fahrenheit
(°F) (25±8 degrees Celsius (°C)) the forces required to fully engage and disengage the plugs
shall be between 20 and 40 pounds (lb.) (9.1 and 18.2 kilograms (kg)). When either the plug or
receptacle is at -65 °F (-54 °C), the force shall be between 20 and 45 lb. (9.1 and 20.4 kg).
Maximum 30 degree rotation to facilitate engagement and disengagement is permitted
(see 4.7.4.4).
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