Welcome to the ASCO Website

Welcome to our website.

Choose another country or region

ASCO Model 420 DC Surge Protective Device

300-1500VDC | 50kA/Mode

The Industry’s first DC Surge Protective Device (SPD) for use in Photovoltaic applications

ASCO Model 420 DC Surge Protective Device

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.