The Siemens SENTRON 3VA2225-6HN32-0HA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying 250 A continuous current at 40 °C and delivering a 242 kA interrupting rating at 240 V. That breaking capacity drops to 187 kA at 415 V and 440 V, 121 kA at 500 V, and 6 kA at 690 V — so the real-world SCCR you can count on depends entirely on your system voltage.
Trip unit and auxiliary release
This MCCB ships with an ETU350 electronic overcurrent release — no ground-fault monitoring, no phase-failure detection, no communication function. The shunt trip lets you remotely open the breaker via a control signal, which is standard for emergency-stop circuits or interlocking schemes.
Thermal derating and endurance
The 250 A rating holds flat up to 50 °C ambient. Above that, it derates linearly: 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. Mechanical endurance is 20,000 operations (latching), which is typical for a distribution-grade MCCB; not a switching duty cycle, but fine for infrequent manual or remote operation. Maximum power loss is 48 W, which matters for enclosure heat rise calculations.