ASCO Model 171 (Edco PC2-TEL) Surge Protective Device

The ASCO Model 171 Surge Protective Device is a solid state, two-line telephone interface protector module. This unit is specifically designed to protect both phone lines required by commercial fire/security panels.


  • Tip to ring protection
  • Tip and ring to ground protection
  • Over-current protection
  • Resettable solid state fuses — PTCs
  • Requires accessory PCB1B base
  • PTU (Pass Thru Unit) available for troubleshooting


  • 5 Year Warranty

Technical Specifications