CR4395 AC Current Sensing Relay

The CR4395 series Current Sensing Relay provides an effective and highly stable method for monitoring electrical current. The current-carrying wire is routed through the opening extending from the top of the case. When current reaches the level set by the trip point adjustment, the relay trips and starts the adjustable timer. After the timer cycles the electromechanical relay is energized. A precision voltage reference circuit ensures a highly repeatable trip point. Design of the power-on delay circuitry allows the supply power to be repeatedly cycled on and off, without affecting the stability of the current sensing operation.

*An External Current Sensing Transformer is needed for the proper operation of models that designate an External Transformer (-R1 or -R2).


Price: $112.32
  • CR4395
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  • Variable trip point and time delay
  • Monitors currents from 1AAC to 100AAC 
  • Electrical isolation between circuits
  • Output relay rated up to 20 Amps
  • LED trip status indicator
  • Dead band prevents relay chatter
  • Calibrated dial option available
  • External current transformers available


  • Power-On Delay: 100 ms max
  • Input Supply Power: Terminals: 2 - 1/4" Male Q C
  • Frequency: 60 to 400 Hz
  • Mechanical Life: 10 million operations, typ.@ rated load


  • Monitor electrical heater elements
  • Sense motor over/under loads
  • Detect lamp burn-out
  • Indicate phase loss
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