Line protection MCCB for a cold-chain panel
The Siemens SENTRON 3VA1125-3GD46-0AA0 is a 4-pole molded case circuit breaker rated for 25 A continuous current, carrying a TM210 thermal-magnetic release designed for line protection in distribution panels. Its interrupting capacity reaches 75.6 kA at 240 V AC and still holds 11.9 kA at 690 V AC, so it handles high-fault scenarios common in industrial refrigeration switchgear without cascading upstream.
What the interrupting ratings mean for your BOM line
The 75.6 kA at 240 V and 52.5 kA at 415 V are the SCCR values that determine whether this breaker coordinates with downstream equipment. At 440 V it still delivers 32 kA, and at 500 V and 690 V it holds 11.9 kA — that's the same figure at both voltages, which is unusual and suggests the arc-quenching design is optimized for that range. If your panel's available fault current at 480 V is under 32 kA, this breaker gives you headroom without upsizing the frame.
Thermal derating and operating range
The breaker carries its full 25 A rating from 40 °C through 50 °C ambient. At 55 °C it derates to 24 A, and at 70 °C it holds 23 A — that's a shallow curve, meaning the TM210 release is thermally stable. For a cold-chain panel running at 25 °C ambient, you get the full rating with margin. The operating range spans -25 °C to 70 °C, and storage goes from -40 °C to 80 °C, so it handles freezer environments and hot electrical rooms alike.
Sourcing for a BOM freeze or LTB watch
This MCCB is sourced through independent distribution channels and quoted to order against an RFQ. For a BOM freeze or last-time-buy planning, the active status means no immediate replacement risk — but if you need a documented cross-reference for a second-source gate, the closest functional peer in the same SENTRON 3VA family is the 3VA1110-5ED36-0AA0, which carries a lower interrupting capacity and a different release type. The 3VA1125-3GD46-0AA0 drops into the same panel cutout as that peer without rewiring, but verify the SCCR coordination study before swapping.