What it is and what it does
The Siemens SENTRON 3VA2163-5JP32-0AH0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current of 63 A, with a trip indicator and a communication function for integration into higher-level monitoring systems. Its breaking capacity is 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V — the 187 kA figure at 240 V means it can safely interrupt a fault current that high without cascading damage upstream, which is critical for high-fault installations like large transformer secondaries or busway taps. The thermal-magnetic trip curve holds its 63 A rating across the full ambient range from 40 °C to 70 °C — no derating needed when the panel runs hot, which simplifies panel design in confined enclosures.
Where it fits
At 105 mm wide, 181 mm tall, and 86 mm deep, this MCCB occupies a standard 3-pole molded-case footprint and mounts directly onto a DIN rail or panel plate — the 86 mm depth is the dimension you need to clear when planning gland-plate clearance or enclosure depth. It is designed for line protection (not motor or feeder protection), so it is the right choice for main or branch-circuit overcurrent protection in distribution panels, switchboards, and downstream sub-panels where the load is resistive or general-purpose.
What the auxiliary switch complement means
It ships with 2 auxiliary switches and 1 trip alarm switch (HQ type) factory-fitted — that gives you two independent status contacts for remote indication (e.g., breaker open/closed) plus a dedicated alarm contact that changes state only when the breaker trips on fault, not on manual switching. No undervoltage release and no ground-fault monitoring are included — if your application requires undervoltage protection or GFCI, you would need a different variant or an add-on module.