Overview
The Cooper Interconnects M55181/1-03 is a 4-position circular connector plug manufactured to MIL-DTL-55181 specifications. This right-angle plug features gold-plated copper alloy contacts and delivers proven reliability across military and industrial applications requiring robust power and signal interconnection.
Key Features
- Time-tested field-proven reliability for over 30 years, with corrosion-resistant aluminum alloy construction and high-impact solid brass plug elements
- 500 mate/unmate cycle rating for extended service life
- Center-locking screw with fold-down wing-blade handle for ultimate shock and vibration resistance
- Watertight seal to prevent moisture, dust and dirt contamination
- Supports cable-to-cable, cable-to-panel, and jam nut panel mounting configurations
- 4-way circular connector with gold-plated copper alloy contacts
Technical Specifications
- Connector Type: Right-angle circular plug
- Number of Contacts: 4
- Contact Type: Solder socket
- Military Specification: MIL-DTL-55181
- Insulation Resistance: 1000 Megohms minimum at 500 Volts DC; durability rated for 500 cycles with coupling torque of 25 inch-pounds
- Contact retention: 10 pounds; insert strength: 400 pounds
- Shell materials: Brass with 0.0003-inch cadmium plate and olive-drab chromate; nose pieces of alloy steel with matching finish
- Draw screws: Stainless steel
- Coupling Style: Center-lock
Typical Applications
The M55181 series has been used in rugged, harsh environment applications across military and industrial sectors. Specific deployments include:
- SINCGARS (Single Channel Ground and Airborne Radio System) panel mount connectors for power connections
- JTRS (Joint Tactical Radio System) radios for power requirements
- Ground support equipment requiring proven reliability under extreme environmental stress
- Cable-to-panel power interconnections in aerospace and defense systems
Compatibility & Replacements
Compatible With
- QPL qualified M55181 series meeting MIL-DTL-55181 specifications, following U.S. government part number designation
- Ground support equipment with standard M55181 receptacle interfaces
- SINCGARS and JTRS radio systems utilizing M55181 power connectors
Replaces / Drop-In Replacement For
- Adapter assemblies such as A3014040-2, A3014040-4, A3014040-5, and A3014041-1 utilize the M55181/1-03 specification
- GC55181/1-AD2 Commercial-Off-the-Shelf (COTS) equivalents in non-QPL applications
Works With
- M55181 series available in 4-, 9- and 18-contact versions as plugs or receptacles for flexible system integration
- COTS (Commercial-Off-the-Shelf) versions providing same performance at economical pricing for non-certified applications
- Standard MIL-DTL-55181 receptacles and panel-mount configurations
- Mating with M55181/1-0X and M55181/1-03 series receptacles
