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OVR T2 AC Surge Protective Devices

OVR T2 Series AC SPDS are Type 4CA UL 1449 5th Ed surge protective devices. They help reduce costly downtime while protecting sensitive electronic equipment against the damaging effects of transients caused by lightning, utility load switching, internal load switching, and more. 

SPDs have effective voltage protection ratings, keeping damaging voltage peaks from exceeding the withstand voltages of the protected equipment.

Features and benefits

  • UL 1449 Type 4 CA SPD for Type 2 applications
  • MOV technology delivers protection from overvoltage spikes
  • Replaceable and pluggable cartridges save time and make maintenance easier 
  • An indicator light provides an easy diagnostic of the SPD’s operational status 
  • End-of-life signal is standard on 40 kA units
  • Optional auxiliary contacts allow remote monitoring of the SPD
  • Space-saving design is ideal for compact DIN rail-mounted installation

Technical specifications

  • 15 and 40kA Surge Current Rating 
  • 150, 320, 440, 550, and 660V AC max continuous operating voltage (MCOV)
  • UL 1449 I-nominal Rating: 20 kA
  • UL 1449 Short Circuit Current Rating (SCCR): 200 kAIC
  • Operating Frequency: 50 – 60 Hz

Certifications and standards

  • UL Type Designation: Type 4CA 
  • UL 1449 5th Edition (UL File: E316636)


  • UL 508 Panelboards 
  • Control panels
  • Elevators
  • LED signages