Thermal Protection Surge Protector 100K Amps 521-TPSPD

Thermally‑Protected Surge Protector (521-TPSPD) is designed for rugged HVAC environments. This surge protector delivers an industry-leading maximum surge current capacity of 100,000 amps, making it a top choice for safeguarding high-cost equipment such as compressors, ductless systems, and furnaces. It accommodates either 120/240 VAC single-phase (50/60 Hz) service and is rated for Type 1 or Type 2 installation locations, ideal for A/C disconnects, junction boxes, or indoor/outdoor electrical enclosures. Outward-facing protection features include a NEMA 4X enclosure, green LED diagnostic indicator (GREEN = active protection, OFF = replace device), and a robust short-circuit current rating (SCCR) of 200 kA for high-performing system resilience. Built specifically for HVAC professionals, this unit helps minimize surge-related equipment failures, protects sensitive controls, and ultimately reduces costly downtime.