SENTRON 3VA2025-7HN46-0AA0 — 25 A MCCB with ETU350 Trip Unit
The Siemens SENTRON 3VA2025-7HN46-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 25 A continuous current, designed for line protection in distribution panels. It carries a 330 kA interrupting capacity at 240 V AC and 242 kA at 415 V AC, with the rating dropping to 3 kA at 690 V AC — the high short-circuit performance at typical low-voltage levels means it can be applied upstream of smaller branch breakers without cascading concerns. The ETU350 electronic trip unit provides adjustable overload and short-circuit protection curves, suited for feeder or main breaker duty in commercial and industrial switchboards. Rated insulation voltage is 800 V, and the breaker operates across -25 °C to 70 °C ambient, with storage from -40 °C to 80 °C. Front protection is IP40, so it's suitable for enclosed panel mounting where the front face is behind a door or cover. Maximum power loss is 0.5 W per pole at rated current — negligible for thermal budgeting inside a crowded enclosure.
Mounting Dimensions and Panel Fit
The breaker measures 86 mm deep, 140 mm wide, and 181 mm high. The 140 mm width across four poles is standard for a 4-pole MCCB in this frame size — verify the DIN-rail or bolt-on mounting footprint matches the existing backpanel layout. No undervoltage release or communication module is fitted on this variant, so no additional wiring for those accessories is needed.