Welcome to the ASCO Website

Welcome to our website.

Choose another country or region

ASCO Model 570 Surge Protective Device with Active Surge MonitorTM

120-480VAC | 250-750kA/Phase

The ASCO 570 Surge Protective Device is a true hybrid, offering a coordinated multi-stage system of suppression, integrating the fast response time of the SAD (Silicon Avalanche Diode) modules with the high-energy capability of the MOV modules. Superior clamping at surge current ratings up to 375kA per mode or 750kA per phase. Model 570 is equipped with the latest Active Surge Monitor for voltage monitoring.

ASCO Model 560 Surge Protective Device with Active Surge MonitorTM
  • Features

    • Active Surge Monitor, web-based power quality monitoring
    • Set automatic email notifications to alert up to three separate users with anomalies recorded
    • Ability to monitor voltage at connected panel and track system anomalies such as transients, surges, swells and VTHDs
    • Storage of over 2000 events/reports
    • User configurable alarm thresholds, time/date stamp, duration and magnitude of events offers multiple data points
    • Three access channels - Ethernet, MODBUS TCP or Serial MODBUS
    • Convenient access to present and past event data from any device with internet connection
    • Manage power system with statistical summaries & reporting software
    • Local interface with push button navigation
    • Patented component level monitoring including neutral to ground
    • Unique sand-packed silver fuse network UL Rated at 200kAIC for safety
    • All surge suppression components used are computer tested and matched
    • SADs are matched to +/- 1% and MOVs are matched to 1 volt for optimum reliability and long life
    • Highest surge current capability and survivability in the industry
    • Built-in-test feature standard


    • True, coordinated multi-staged system of suppression
    • Lowest UL 1449 clamping voltages achieved
    • Smaller enclosure size allows an easier installation for hybrid system
    • 10 Years (on all parts)
    • 5 Years (on-site labor)

Need a technical document?

Search our download center to find drawings, manuals and data sheets for your product.

Need support?

Contact our support team for technical help and information.

Ready to order?

Find your local ASCO sales representative.