What this MCCB does and where it fits
The Siemens 3VA2125-7KP32-0AA0 is a SENTRON molded case circuit breaker designed for line protection, rated 25 A continuous current across the full -25 °C to 70 °C operating range with no derating needed up to 70 °C. Its ETU850 electronic trip unit provides adjustable overload and short-circuit protection, with communication capability for integration into higher-level monitoring systems. The 3-pole frame delivers a 330 kA interrupting rating at 240 V, stepping down to 242 kA at 415/440 V and 187 kA at 500 V — enough headroom for most industrial main or feeder applications with high available fault current.
Panel fit and integration
This MCCB measures 181 mm high, 105 mm wide, and 86 mm deep — a standard SENTRON 3VA frame size that drops into existing switchboard or panel layouts without re-drilling. The front face carries IP40 protection, so it's fine for enclosed distribution boards but not for washdown areas. With no undervoltage release and no ground-fault monitoring version fitted, it's a straight line-protection device; add external modules if those functions are needed.
Key ratings at a glance
Rated insulation voltage: 800 V. Power loss max: 0.6 W. Storage temperature: -40 °C to 80 °C. Trip indicator: not fitted. Voltage trigger: not fitted. Communication function is built into the ETU850, enabling remote monitoring and parameterization via the SENTRON communication bus.