ASCO Model 131 (Edco OPX-SPK) Surge Protective Device

The ASCO Model 131 surge protector is specifically designed for medium exposure applications. Thus, the protector can be used on pairs inside a building or leaving the building in conduit up to 500 feet. This protection is intended to be used in conjunction with the ASCO MGBW Ground Rail and a standard MI-50 Punch Down Block.


  • Over current protection
  • Replaces bridging clips on M1-50 bock
  • UL 497B listed
  • Utilizes MGB grounding rail
  • Test point accessible
  • 5-year warranty


  • Low Cost
  • Zero Series Resistance
  • Durable
  • Solidstate Construction 

Technical Specifications