The SENTRON 3VM1325-5MH32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous at 40 °C, with a TM120M thermal-magnetic release. It's designed for starter protection — meaning it's tuned for motor branch circuits where the inrush and overload profile differs from a straight feeder breaker. Breaking capacity hits 187 kA at 240 V, 121 kA at 415 V, and 76 kA at 500 V, so it handles high-fault panels without cascading upstream.
Current derating and thermal budget
This MCCB holds its full 250 A rating up to 50 °C ambient. Above that, it derates: 245 A at 55 °C, 239 A at 60 °C, 234 A at 65 °C, and 228 A at 70 °C. Maximum power loss is 30 W, which matters for enclosure heat rise calculations — especially in a sealed panel with other heat sources. The front face carries IP40 protection, so it's fine for a clean indoor panel but not washdown areas.
Lifecycle and sourcing
Current lifecycle stage per the manufacturer — no end-of-life notice on record. This is a standard catalog item in the SENTRON 3VM family. Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.
Physical fit and panel integration
Dimensions are 248 mm high, 138 mm wide, 110 mm deep. That's a 3-pole frame size that mounts on a DIN rail or direct-panel bolt pattern typical for SENTRON MCCBs. No undervoltage release, no ground-fault monitoring, no communication module — it's a straight thermal-magnetic breaker with no auxiliary electronics. Insulation voltage rated at 800 V, so it's comfortable on 480 V and 600 V class systems.