Product overview DINrail surge protective device designed for household and light commercial AC power systems. This 4pole, 4080KA model provides capacity transient current handling for AC100380V networks. Available in 2pole and 4pole configurations and in four discharge ranges: 1020KA, 2040KA, 3060KA, and 4080KA. Key benefits surge capacity: 4080KA nominal discharge range for this variant, suited to strong transient events. Broad voltage compatibility: works with AC100380V power systems for singlephase or threephase installations. Flexible configurations: choose 2P for singlephase setups or 4P for threephase plus neutral applications. Spaceefficient mounting: DINrail form factor fits standard distribution and control panels for tidy installations. Reduces downtime risk: helps limit voltage spikes that can disrupt electronics and control equipment. Primary functions and attributes Function: diverts transient surge current away from connected equipment to minimize overvoltage exposure. Compatibility: AC100380V systems, singlephase and threephase distribution boards when selecting appropriate pole count. Size and performance: model options span 1020KA up to 4080KA to match site surge exposure and protection needs. Construction: compact, panelmountable DINrail housing suitable for electrical distribution enclosures. Typical applications Home distribution board: protect refrigerators, televisions, routers, and other household electronics from lightninginduced or switching surges. Small commercial and office electrical panels: safeguard servers, POS equipment, and lighting controls. Equipment control cabinets and light industrial installations: protect inverters, motor drives, and automation controllers in threephase systems. Installation notes Mount on standard DIN rail close to the main incoming supply for surge diversion performance. Select 2P or 4P according to system wiring and choose the discharge rating that matches local surge risk. Follow local electrical codes and have a qualified electrician perform the connection. This DINrail SPD offers a practical, capacity option for improving surge resilience in residential and light commercial power systems without altering existing distribution layouts.