ASCO Model 238 (Edco TCS-HWR) Surge Protective Device

Utilizing bipolar Silicon Avalanche Diode (SAD) technology, the ASCO Model 238 features a two-stage design that provides superior protection for sensitive equipment and for ANSI/IEEE C62.41 Location Category A applications.


  • Provides superior, non-degrading protection using bipolar SAD technology
  • Protects individual circuits
  • Provides independent secondary stage for maximum continued protection
  • Installs easily and uses a small amount of space
  • Withstands demanding environments with its rugged metal enclosure


  • Installs easily
  • 5 Year Warranty

Technical Specifications