Siemens SENTRON 3VA2163-5KP32-0JL0 — 63 A MCCB with ETU850
The Siemens SENTRON 3VA2163-5KP32-0JL0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current (Iu) at 40 °C, with a rated insulation voltage of 800 V. It carries a 187 kA breaking capacity at 240 V, 121 kA at 415/440 V, and 79 kA at 500 V — enough headroom for most industrial fault-current scenarios without cascading upstream. The ETU850 electronic trip unit gives you adjustable LSI protection curves (long-time, short-time, instantaneous) plus a communication function for integration into a power monitoring or control system. Auxiliary contacts include 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch HQ — enough signaling for remote status and fault annunciation.
Breaking capacity & selectivity planning
At 415 V and 440 V the breaker holds 121 kA symmetrical — that's full-rated interrupting capacity, not a conditional short-circuit rating. At 690 V it drops to 4.25 kA, so if your panel runs 690 V motor feeders, verify the available fault current stays under that threshold or add a current-limiting upstream device. The 63 A frame is thermally rated to carry full load without derating up to 50 °C; at 70 °C it derates to 53.55 A.
Panel integration & wiring
Footprint is 105 mm wide, 181 mm tall, 86 mm deep — fits standard MCCB mounting patterns in a distribution panel or motor control center. Spring-cage terminals accept 0.2–2.5 mm² solid or ferruled stranded. Strip length of 8 mm avoids whiskers under the cage. The shunt trip (STL) is built in, so no external undervoltage release is fitted — if you need UVR protection, that's a separate accessory.