Siemens 3VA2125-6JP32-0AA0 — 25 A MCCB with ETU550 Trip Unit
The Siemens 3VA2125-6JP32-0AA0 is a SENTRON molded case circuit breaker rated for 25 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. It carries an ETU550 electronic trip unit, which gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves. The 3-pole configuration is sized for line protection in distribution panels feeding motor control centers or downstream sub-distribution. Breaking capacity is the headline here: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3.7 kA at 690 V. That 242 kA at 240 V is exceptionally high for a 25 A frame — it handles high-fault utility feeds or transformer secondaries without cascading upstream. The 187 kA at 415 V covers most European industrial distribution. The breaker includes onboard communication function, so it can report status and trip events to a higher-level control system without an add-on module. Front protection is IP40, suitable for enclosed panel mounting — not for washdown environments. Dimensions are 105 mm wide, 181 mm high, 86 mm deep, fitting standard SENTRON 3VA switchboard cutouts.
Integration Notes
Mounts on a DIN rail or direct panel-mount via the SENTRON 3VA mounting base. The 105 mm width occupies three modular spaces.