What this MCCB carries and where it fits
The Siemens SENTRON 3VA2225-7HN32-0DC0 is a 3-pole molded case circuit breaker rated for 250 A continuous current, sized for line protection in distribution panels. Its interrupting capacity hits 330 kA at 240 VAC and stays at 242 kA through 440 VAC, then drops to 187 kA at 500 VAC and 4.5 kA at 690 VAC — so the voltage class of your service entrance or feeder panel decides which rating governs the fault duty. The breaker carries an undervoltage release (UVR) and two HQ auxiliary switches, meaning it can trip on loss of control voltage and report position back to a PLC or status lamp without an add-on module. That UVR is a common spec for safety circuits where a drop in control power must open the main breaker. Thermal derating starts at 55 °C: the breaker holds 250 A flat through 50 °C, then steps down to 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. If your panel ambient runs above 50 °C, size the load or the breaker accordingly — the continuous rating at 70 °C is 213 A, not 250 A. Maximum power loss is 50.5 W, which matters for enclosure heat rise calculations in a sealed panel. Physical footprint: 105 mm wide, 181 mm tall, 86 mm deep. That 105 mm width is the standard 3-pole MCCB form factor for this class — it fits the same panel cutout and busbar spacing as other SENTRON 3VA2 frame breakers. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.
What the auxiliary release and switches add
The built-in undervoltage release (UVR) trips the breaker when control voltage drops below its dropout threshold — typical for emergency-stop chains or undervoltage protection schemes where a loss of control power must open the main circuit. The two HQ auxiliary switches provide electrically isolated position feedback (open/closed) for PLC inputs or status indicators. Because both are factory-integrated into the 3VA2225-7HN32-0DC0 variant, there is no separate kit to order or install; the breaker arrives ready for control wiring to the UVR coil and the auxiliary terminals.