Siemens SENTRON 3VA2110-5MN32-0AA0 — 100 A Motor Protection MCCB
The Siemens SENTRON 3VA2110-5MN32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current across the full ambient range from 40 °C to 70 °C, meaning no derating is needed in a warm panel — a practical advantage when the breaker sits near other heat sources. It is designed specifically for motor protection, with adjustable trip classes of 10A, 10E, and 20E, and includes phase failure detection. The interrupting capacity reaches 121 kA at 415 V, giving it the headroom to clear high-fault conditions on industrial distribution without cascading upstream.
Interrupting Capacity and Selectivity
The interrupting ratings are specified at multiple voltage levels: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. The 121 kA at 415 V is the figure that matters for most European and Asian 400 V-class systems — it means this breaker can be applied on high-capacity transformer secondaries where fault currents are substantial, without needing a current-limiting upstream device. The steep drop to 3.7 kA at 690 V reflects the arc energy at that voltage; for 690 V applications, verify the available fault current stays under that threshold.
Panel Integration and Dimensions
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep — a standard footprint for a 100 A frame MCCB. It mounts directly to a DIN rail or panel-mount plate, and the 3-pole design fits a 3-module-wide cutout in most distribution boards. The 10 W maximum power loss is modest for this rating, so internal cabinet temperature rise stays manageable even in a densely packed enclosure.