Molded case circuit breaker for line protection
The Siemens SENTRON 3VA2025-8JP32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 25 A continuous current, with a maximum frame rating of 300 A and a minimum setting of 38 A. It carries an ETU550 electronic trip unit — a microprocessor-based release that provides adjustable overload and short-circuit protection curves, suitable for line protection in distribution panels. Breaking capacity reaches 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V, so it handles high fault currents across common industrial voltage levels without cascading upstream.
Footprint and panel integration
At 86 mm deep, 105 mm wide, and 181 mm high, the breaker fits a compact DIN-rail or mounting-plate footprint. The front face carries IP40 protection — suitable for enclosed panel installation where tools or fingers might contact the front but not wiring. A communication function is built in, enabling integration with higher-level monitoring or control systems via the SENTRON bus.
Thermal performance and operating range
Rated current holds at 25 A across the full ambient temperature range from 40 °C to 70 °C — no derating needed in warm enclosures. Operating temperature spans -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 0.5 W, negligible for panel thermal budgeting.