ASCO Model 251 (Edco SHP Series) Surge Protective Device

The ASCO MOdel 251 (Edco SHP) Surge Protective Device’s hybrid design exhibits performance levels unattainable with simple “shunt type” protectors. The two active clamp stages, large inductor and shunt capacitance effectively halt high rate-of-rise surge waveforms, thus preventing initial voltage overshoot.


  • Multi-stage hybrid design
  • Incorporates series choke
  • 120 VAC and 240 VACSingle Phase


  • Nanosecond Response Time
  • Blocks High Energy Surges
  • 5 Year Warranty

Technical Specifications