What this MCCB brings to a panel
The Siemens SENTRON 3VA2325-5HN32-0HC0 is a 3-pole molded case circuit breaker rated for 250 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed as the panel warms up. It's designed for line protection, meaning it guards feeders and main distribution against overloads and short circuits, with an interrupting capacity of 187 kA at 240 V and 121 kA at 415 V. The factory-fitted shunt trip (STL) and two auxiliary switches HQ give you remote tripping capability and status feedback without adding accessories later.
Interrupting capacity — what the numbers mean for coordination
At 240 V it clears 187 kA, which is high enough for most service-entrance and large feeder applications. At 415 V the rating drops to 121 kA, still substantial for industrial distribution. At 690 V it's 7.5 kA — that's the limit for 690 V systems, so verify your available fault current at that voltage. These are the values you'd use for selective coordination studies with upstream and downstream devices.
Built-in trip and signaling
The breaker ships with a shunt trip (STL) for remote opening via a control signal — useful for emergency-stop circuits or PLC-controlled disconnects. Two auxiliary switches HQ report open/closed status back to the control system. No undervoltage release is fitted, so if you need UVR for machine safety, that's a separate add-on.
Physical fit and environment
Dimensions are 248 mm high, 138 mm wide, 110 mm deep — a standard SENTRON 3VA frame size for 250 A. It operates from -25 °C to 70 °C ambient and stores from -40 °C to 80 °C. Maximum power loss is 37.5 W, so factor that into enclosure heat calculations if the panel is tightly packed.