MKJ4 Breakaway (Quick Disconnect) Coupling


Part of the MKJ family of miniature circular connectors, ITT Cannon’s MKJ4 Breakaway features a canted retention spring disconnect coupling mechanism. This durable coupling mechanism allows for quick and easy mating and de-mating. MKJ4’s versatility, performance and reliability enable unparalleled functionality to support critical communication, navigation and high-speed data transmission needs, at half the size and weight of traditional connectors.*
*When compared to the 38999 layouts with size 22 contacts


  • Up to a 52% smaller and 71% lighter
  • Prevent miss-mating with 4 Clocking Position
  • Customer Flexibility for Connectivity
  • Ideal for Direct attachment of Cable Shield or Over-molding

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Product Specification


Operating Voltage 500 VAC-Size 23 Contacts; 1800 VAC-Size 20 Contacts; 1800 VAC-Size 16 Contacts; 1800 VAC-Size 12 Contacts
Current Rating 5 Amp- Size 23 Contact; 7.5 Amp-Size 20 Contact; 13 Amp-Size 16 Contact; 23 Amp-Size 12 Contact
Number of Signal Contacts (Min/Max) N/A
Gauge Wire Size #22-28 AWG-Size 23 Contacts; #20-#24 AWG-Size 20 Contacts; #16-#20 AWG-Size 16 Contacts; #12-#14 AWG-Size 12 Contacts


Shell Aluminum Alloy, Stainless Steel
Shell Plating Aluminum/Anodized (Black), Aluminum/Electroless Nickel, Aluminum/OD Cad, SS/Passivated, Aluminum/Zinc Nickel, Black Aluminum Teflon Nickel
Insulator MKJ0, MKJ4-Thermoplastic; MKJ1,MKJ3 -Thermostatic
Contact Copper alloy, gold over nickel plating
Contact Plating Gold, Nickel


Shape Circular
Shell Style Jam nut, PCB mount, Wall mount
Durability >500 Mating Cycles
Power & Signal In Same Layout No
Contact Style / Termination Crimp, Solder, Printed Circuit


Sealing Environmental
Operation Temperature -55°C to +150°C

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