The Siemens SENTRON 3VA1125-6EF32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, with a TM240 thermal-magnetic overcurrent release. It carries 25 A continuously at 40 °C and delivers a 220 kA interrupting capacity at 240 V AC — enough to handle high-fault utility feeds or transformer secondaries without cascading upstream. The 800 V rated insulation voltage and 690 V max operating voltage suit it for 480 V and 600 V class panels common in North American and IEC installations. Breaking capacity drops with voltage: 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 500 V or 690 V (–). For DC applications, the rated operational voltage is 500 V. The TM240 release means the thermal element is calibrated for a 240 A frame — this breaker is the 25 A tap, so the trip curve is fixed and non-interchangeable in the field.
Panel Integration
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures. The front face carries IP40 protection, meaning it is protected against tools and wires >1 mm but not against water ingress; keep it inside a rated enclosure in washdown areas. Power loss is 8.5 W maximum, so thermal rise inside a sealed cabinet is manageable but should be factored into the cooling budget.
Environmental & Compliance
Operating temperature range is -25 °C to +70 °C; storage from -40 °C to +80 °C. The breaker has no undervoltage release, no communication function, no ground-fault monitoring, and no trip indicator — it is a basic thermal-magnetic line-protection device, not a smart or communicating unit. Compliance documentation (RoHS, REACH, UL, IEC) is available from the manufacturer; the part carries the SENTRON brand designation.