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ASCO Model 485 Surge Protective Device

120-600VAC | 600-900kA/Phase

The ASCO Model 485 Surge Protective Device is our largest, highest kA (SPD). The Model 485 utilizes two separate, dual redundant replaceable modules that work in parallel. It features large block, 50kA thermally protected MOV’s with surge current levels of 600kA - 900kA per phase. This unit is for 'Mission-Critical' environments.

ASCO Model 485 Surge Protective Device
  • Features

    • UL 1449 Fourth Edition Listed
    • Directly Connected, Discrete Protection Elements Between All Possible Modes
    • 600kA – 900kA per phase ratings
    • All UL required OCP & Safety Coordination included inside:
    • - Type 1 SPDs intended for Line or Load Side of Main Disconnect
      - Type 2 SPDs intended for Load Side of Main Disconnect
    • 20kA Inominal (In) (most models)
    • 200kA SCCRs (most models)
    • UL 96A Lightning Protection Master Label compliant
    • Rotary Disconnect Switch included as Standard Equipment
    • Includes Audible Alarm, Silence Switch and Form C Dry Contacts


    • AC Sinewave Tracking Filter with EMI/RFI Filtering up to -50dB from 10kHz to 100MHz
    • (Type 2 option only, incl. UL 1283 Listing)
    • Dual Redundant Replaceable Modules with Large Block 50kA Thermal Protected MOVs
    • Phase Loss Monitoring (toggles LED & Dry Contacts)
    • Standard NEMA 1/12/4 with 3R drains Enclosure
    • Voltage Specific Design – Highly configurable
    • All MOV suppression elements monitored
    • 10 Year Warranty


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