MIL-DTL-22992 Class L
MIL-DTL-22992 Class L / Power Connectors
Part Number Prefix: MS90555 thru MS90558
The MIL-DTL-22992 Class L is a U.S. military specification for the largest, heavy-duty circular electrical connectors designed for high-current applications. These connectors support high-power electrical loads, with current ratings typically ranging from 40 to 200 amperes, suitable for rugged military and industrial power distribution systems. They feature resilient, waterproof construction (IP67 rated) and are built to withstand harsh environmental conditions, including shock, vibration, and immersion. Critical design elements include an arc-quenching socket design and a programmed coupling sequence where grounding and neutral contacts engage first, ensuring maximum safety and reliability for personnel and equipment.
Design Characteristics:
-Heavy electrical loads: current range from 40 to 200 amperes
-Direct current or single/three phase, 60/400 Hertz alternating current
-Double stub coupling threads for faster connections; no cross threading, easy cleaning
-Shells are machined from high strength aluminum and are supplied with conductive or non-conductive finishes.
-Resistance to the operating environments of heat, moisture, vibration, high impact and immersion.
Mil-Spec Prefix:
MS90555 Wall Mount Receptacle (Power Source)
MS90556 Straight Plug
MS90557 Cable Connecting Receptacle without Coupling Ring
MS90558 Wall Mount Plug with Coupling Ring (Equipment End)
Materials:
Shell Material and Plating:
Aluminum, olive drab cadmium
Insert: Thermoplastic and fluorinated silicone elastomer
EMI Spring Fingers: Beryllium copper
O-Ring: Fluorinated Silicone Elastomer