SENTRON 3VA2225-5KP32-0CC0 — 250 A MCCB with ETU850, Active Production
The Siemens SENTRON 3VA2225-5KP32-0CC0 is a 3-pole molded case circuit breaker rated for 250 A continuous current, fitted with an ETU850 electronic trip unit for line protection. It carries a 187 kA interrupting rating at 240 V and 121 kA at 415 V, with the curve dropping to 5.1 kA at 690 V — the high SCCR at common distribution voltages makes it a strong candidate for main or feeder breaker duty in industrial switchboards where fault current is substantial. The ETU850 release provides communication capability and an undervoltage release is integrated, so the breaker can be tied into a plant-wide power management system and respond to loss-of-voltage events automatically. Two HQ auxiliary switches are included for status feedback to a PLC or SCADA.
Thermal Derating and Panel Fit
Full 250 A rating holds up to 50 °C ambient; above that it derates linearly to 200 A at 70 °C. In a sealed enclosure or high-ambient machine cell, the 55 °C figure of 238 A and 60 °C figure of 225 A are the ones to size against. Maximum power loss is 50.5 W — account for that in the enclosure thermal budget. Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint that fits most Siemens SENTRON panelboards and third-party distribution enclosures with adjustable mounting brackets.