ASCO Model 258 (Edco SHA-1250) Surge Protective Device

ASCO Model 258 (Edco SHA-1250) Surge Protective Device | FrontView

The ASCO Model 258 Surge Protective Device is an upgraded version of the Edco SHA-1210IRS. The two models are equal in surge protection performance. Model 258 also incorporates two LEDs for failure indicator in a modular package (utilizes 12-pin Beau connector). The hardwire terminal base (SHABA accessory) accommodates all wiring and the protection module is designed for easy replacement.


  • Clamping Voltage: 340 VAC
  • Operating Current: 15A
  • Peak Surge Current: 45kA/Phase, 60kA/Total
  • Operating Frequency: 47-63 Hz
  • EMI Attenuation: 50 dB typ


  • Plug-in module
  • LED indication
  • Filtering
  • Remote-sensing circuitry
  • 5 year warranty

Specification Documentation