MIL-DTL-22992 Cylindrical Connectors for Harsh Environments

For the heaviest electrical loads, CDM recommends MS90555,MS90556,MS90557 & MS90558 Class L connectors from Cooper Interconnect (Formerly General Connector/WPI Interconnect), and Amphenol’s Heavy Duty Cylindrical Connectors. Qualified per MIL-DTL-22992 (formerly MIL-C-22992), MS90556, and MS90557, the Class L connector is the largest size cylindrical available, offering the greatest capacity. It features a current range of 40 to 200 amps, and conductor sizes ranging from 5 to 4/0. Additionally, the connector provides unparalleled performance and reliability in extreme environments while ensuring safety.

Class L Connectors are highly suitable for mission-critical applications in the aerospace industry, and are in use by all branches of the military, including the Army, Navy, Air Force, and Marines. Because of its high reliability, MIL-DTL-22992 Cylindrical Connectors can also be found in industrial applications, e.g. communication satellites and commercial aircraft.

The Class L connector is uniquely engineered to optimize safety. It offers an arc quenching design to safeguard users when connectors are separated under load, while its programmed coupling sequence makes sure grounding and neutral contacts engage before the power contacts. At un-mating, the power circuits are broken before the ground or neutral circuits. A 5-key polarizing system is employed to preclude the mating of circuits with incompatible power characteristics (voltage, phase and frequency).

To promote reliability, the standardized insert arrangement specifies connector/cable combinations. Its double stub coupling threads facilitate easy cleaning, faster mating and minimal risk of cross threading. Rigorously tested in harsh environments, the unit’s design provides strategically placed grommets and seals to provide superior weather-tight connections. Left-hand accessory treads minimize the incidence of wire breakage and cable twisting, as well as protect the connector from unintentional disassembly.

Class Ls are offered in shell sizes 28, 32, 44, and 52, with current ratings of 40, 60, 100, and 200 amps respectively. Corresponding contact sizes are 6, 4,1/0 and 4/0. The QPL’d device is engineered to facilitate straight-line accessory attachment to help prevent cable twisting or misalignment. The singularly durable connector is manufactured of high-strength, aluminum, and features copper alloy, silver over nickel contacts.

For more information about Cooper Interconnect's shell sizes 32 and 44, see: MIL22992 Connectors

For more information about Amphenol's Connectors see: Amphenol MIL-DTL-22992 

Contact CDM Electronics for more information