MRJ21 Board-Mount Connectors

TE Connectivity
Part Number Information
Part #: Price/Availability:
1339381 Buy Now
1761482 Buy Now

MRJ21 product is the next generation of I/O interconnects providing density/space savings for current 10/100 or GbE RJ45 applications or RJ21 applications. The MRJ21 is a high density cable assembly I/O product that requires one third (1/3) the space of standard telecom configurations using Mod Plugs or RJ21 telecom connectors.  


  • Dense Champ style double blade design with offset jackscrews
  • Contact layout and footprint for differential pairs creates reduced crosstalk and built in compensation
  • 1.5 to 4 times the port density of 2x6 Stacked Mod Jack (RJ45)
  • 3 times the port density of an RJ21
  • Height of dual receptacle meets requirements of Compact PCI component standard
  • Jackscrews for positive latching and secure cable retention
  • Fully shielded system to control EMI
  • Robust die cast cable covers provide 45º left or right cable exit for ease of routing
  • 1mm pair spacing, 1.5mm pair to pair spacing


  • Modular Data Center / SAN Connectivity
    • Switches
    • Core & Edge Routers
    • Digital Cross Connects
    • Gigabit Ethernet , 10/100 BaseT
    • DSLAM
    • Almost any place Mod Plugs are used today