SENTRON 3VA2 MCCB for Motor Protection
The Siemens 3VA2163-5MN32-0JH0 is a SENTRON series 3-pole molded case circuit breaker (MCCB) designed specifically for motor protection, with phase failure detection built in. It carries a full 63 A rating across the entire 40 °C to 70 °C operating range — no derating needed as ambient climbs, which simplifies panel layout when the breaker sits near heat-producing contactors or drives. The interrupting capacity reaches 187 kA at 240 V and 121 kA at 415 V, so it can be applied upstream in high-fault installations without cascading to a larger frame.
Interrupting Ratings and Selectivity
The 3VA2163-5MN32-0JH0 delivers 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 sharp drop at 690 V is typical for this frame size — the arc extinction limits at higher voltage mean this breaker is not a candidate for 690 V motor circuits unless the available fault current is verified below 3.7 kA. At 415 V the 121 kA figure provides headroom for most industrial distribution panels, supporting selective coordination with downstream 18 kA or 25 kA MCCBs.
Panel Integration and Dimensions
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint for DIN-rail or screw-mount panel integration. The 4 W maximum power loss at rated load is low enough that forced ventilation is not required in a typical IP54 enclosure, but verify free air around the arc-chamber vents when grouping multiple breakers. The trip indicator and voltage trigger are present; undervoltage release and ground-fault monitoring are not fitted on this variant.