What this MCCB carries and where it fits
The Siemens SENTRON 3VA1025-3ED32-0JC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying 25 A continuously at 40 °C ambient — and it holds that same 25 A rating all the way up to 50 °C, only tapering to 24 A at 55 °C and 23 A at 70 °C. That thermal curve means you don't have to oversize the frame for a warm panel; the breaker delivers its full nameplate current across most real-world enclosure temperatures. Breaking capacity is the headline here: 75.6 kA at 240 V AC, 52.5 kA at 415 V, 32 kA at 440 V, and still 7.5 kA at 690 V. That 75.6 kA at 240 V puts it squarely in the high-interrupting class for North American 240/277 V distribution — it clears a bolted fault on a large step-down transformer without the upstream fuse having to see it. Rated insulation voltage is 800 V, so the 690 V rating is within the safe operating envelope. Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard SENTRON 3VA frame footprint that drops into existing DIN-rail or panel-mount layouts without re-drilling. The auxiliary release is a shunt trip (STL), and the design includes two HQ auxiliary switches. No undervoltage release, no ground-fault monitoring, no communication module — this is a straight line-protection breaker with a remote-trip coil for emergency-off or supervisory circuits.
Sourcing and lifecycle
Lifecycle status is listed as current — this is an active catalog item in the SENTRON 3VA family, not a phase-out or last-time-buy. That means the factory line is still running it, and the usual Siemens distribution channel carries it. For a BOM freeze or a panel that needs a documented MCCB for a UL 508A or IEC 60947-2 listing, this is a safe spec. Maximum power loss is 8.5 W — relevant for thermal calculations inside a sealed enclosure with other heat sources. Storage temperature range is -40 °C to 80 °C; operating range is -25 °C to 70 °C. The breaker is quoted to order against an RFQ; availability and current pricing are confirmed at quote time through independent distribution channels.