Siemens 3VA2225-6JP42-0AA0 SENTRON 4-Pole MCCB, 250 A, ETU550
The Siemens 3VA2225-6JP42-0AA0 is a SENTRON-series molded case circuit breaker (MCCB) designed for line protection in 3-phase + neutral distribution. It carries 250 A continuous at 40 °C, with the ETU550 electronic trip unit providing adjustable overload and short-circuit protection curves. Rated for 4-pole operation, it handles neutral protection in TN or TT systems without a separate N breaker. The 250 A rating holds flat from 40 °C to 50 °C, then derates linearly to 200 A at 70 °C — critical overhead for panels packed near heat sources. Short-circuit interrupting capacity reaches 242 kA at 240 V, 187 kA at 415/440 V, 121 kA at 500 V, and 4.5 kA at 690 V. The 690 V figure looks low because the arc extinction physics shift at that voltage — verify the available fault current at your service voltage before specifying.
Integration & Mounting
Footprint is 140 mm wide × 181 mm tall × 86 mm deep — fits standard Siemens 3VA2 panel cutouts and busbar systems. IP40 on the front face means it's protected against tools and wires >1 mm, but not against water ingress; mount inside a rated enclosure for wet or washdown environments. Power loss at full rated current is 48 W maximum. In a sealed enclosure with multiple breakers ganged, account for that dissipation in the thermal budget — 250 A continuous through the poles generates measurable heat. Communication function is built in — the ETU550 supports optional communication modules for remote monitoring and trip-event logging. No undervoltage release or ground-fault monitoring is fitted on this variant; those are separate accessory options.
Environmental & Compliance
Operating temperature range is -25 °C to +70 °C; storage from -40 °C to +80 °C. Insulation voltage rated at 800 V. The 3VA2 series carries UL, CSA, and IEC certifications typical for SENTRON — compliance documentation including RoHS and REACH declarations is available through Siemens support channels.