ASCO Model 137 (Edco FAS-TEL-DOT) Surge Protective Device

The ASCO Model 137 is a single pair telephone protector that implements an advanced three-stage hybrid design. Model 137 is specifically designed for more rugged applications such as traffic cabinets.


  • Three-stage hybrid design
  • Rugged gas tube protection
  • Sneak/fault current protection
  • Fast response time
  • 5 year warranty


  • UL Listed
  • 5 Year Warranty
  • 1 Year Warranty (on certain models)

Technical Specifications