SolaHD STV25K-10S Surge Suppressor Protector DIN Rail

STV25K-10S is a DIN-rail mounted surge protector from SolaHD (Emerson) designed for 120 VAC single‑phase circuits, providing point‑of‑use protection against transient surges. The Type 4 SPD specifies a nominal operating voltage (MCOV) of 150 VAC and accepts a 120 VAC nominal input (0–135 VRMS) with a maximum load current of 20 A. It offers protection across all modes: L–N, L–L, L–G, and N–G, and delivers a peak surge current capability of 25 kA per mode (8 × 20 μs). The device mounts on a standard DIN rail and uses screw terminals suitable for #12 AWG conductors; the chassis can also be mounted as a standalone unit with the optional bracket (SDN-PMBRK2). Its compact enclosure measures about 4.87 in (H) × 2.50 in (W) × 4.375 in (D) and weighs roughly 3 lb. Operational range includes -40°C to +60°C and 47–63 Hz operation, with a response time under 0.5 ns and a green status LED to indicate operation; UL 1449 (2nd edition) certification confirms its compliance for surge protection. This STV25K-10S is intended for protecting sensitive equipment in control panels, industrial automation cabinets, and other DIN-rail installations from lightning‑induced transients and switching surges.