277 Vac, 1-Pole, Single-Phase, 2-Wire, Modular Protector - Transtector I2R-75K277

Modular, 20 kA, single-phase surge protection device engineered for industrial communication applications.

Network safety and reliability are built into the I2R 75K series.  Engineered using patented safe-fail self-protection design, the I2R SPD couples a high short circuit rating with thermally protected MOV, which eliminates the need for additional overcurrent protection devices.



  • Safe-fail, self-protected design
  • No additional overcurrent protection devices or back up fusing required
  • Reverse chassis direction capability allows cable entry from top to bottom
  • Remote visual status indication
  • IP 20 finger-safe design
  • VPL 600 Vac
  • Replacement modules available (I2R-75KR277)

Specifications for Transtector I2R-75KS277

277 Vac
Mount Type
DIN rail
L-N 320 Vac
Weight (lb)
0.34 lb
Dimensions (inches)
4.0 x 0.69 x 2.78