Square D™ Surgelogic™ HWA Surge Protective Devices (SPDs) are designed to provide high-quality surge mitigation for a wide variety of commercial, industrial or institutional indoor applications. The HWA designs are for standard distribution panel and branch panel installations, and provide EMI/RFI noise attenuation as a standard feature. The HWA is a UL 1449 Type 2 listed device with complementary UL 1283 listing.
