Siemens 3VA1225-5GF42-0KH0 — 250 A SENTRON MCCB for Line Protection
The Siemens 3VA1225-5GF42-0KH0 is a 4-pole SENTRON molded case circuit breaker rated at 250 A continuous, with an interrupting capacity of 187 kA at 240 V and 121 kA at 415 V. The 250 A rating holds from 40 °C up to 50 °C without derating; above that it steps down to 243 A at 55 °C and 223 A at 70 °C — useful to know if the breaker lands in a hot top-of-panel location.
Interrupting Capacity and Selectivity Headroom
The 187 kA at 240 V is the highest short-circuit rating on this frame; at 415 V it still delivers 121 kA, and at 690 V it holds 17 kA.
Built-in Auxiliary Switches and Shunt Trip
The trip indicator and voltage trigger are both present, so you get local mechanical indication and the ability to wire the shunt trip into an E-stop or PLC-based safety circuit. No undervoltage release is fitted — if you need UVR for a machine safety loop, this is not the variant.