The Siemens 3VA2025-7HN42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 25 A continuous current with a 4-pole configuration, designed for line protection duty. It carries the ETU350 electronic trip unit, which gives adjustable overload and short-circuit protection curves — useful for coordinating downstream feeders in a distribution panel. Breaking capacity is 330 kA at 240 V, dropping to 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3 kA at 690 V. That 330 kA figure at 240 V is exceptionally high for a 25 A frame — it handles utility-level fault currents without needing a current-limiting upstream device, which simplifies panel coordination. The insulation voltage is rated at 800 V, and the front face carries IP40 protection — fine for a clean indoor panel, but not for washdown or outdoor exposure.
Dimensions & Panel Fit
The MCCB measures 86 mm deep, 140 mm wide, and 181 mm high. It mounts on a DIN rail or directly to a panel backplate via the screw terminals — standard for SENTRON 3VA frames. The 4-pole width (140 mm) matches the common footprint for a 4-pole MCCB in this class, so it should drop into an existing panel cutout sized for a similar Siemens frame without re-drilling.