What this MCCB is and what it does
The Siemens 3VA2063-5KP32-0CC0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient range up to 70 °C — no derating needed. It's a 3-pole unit designed for line protection, with a built-in communication function and an undervoltage release (UVR) as the auxiliary release. The interrupting ratings are serious: 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 3 kA at 690 V. That means it can sit upstream in a high-fault panel without needing a current-limiting fuse ahead of it — the SCCR is the breaker itself.
Footprint and panel fit
The case measures 105 mm wide, 181 mm tall, and 86 mm deep — a standard SENTRON 3VA2 frame size. It mounts on a DIN rail or directly to a backplate via the screw holes. The depth of 86 mm means it clears most 200 mm deep enclosures with room for wiring gutters. Power loss is 7.9 W max, so thermal rise in a sealed panel is manageable — no forced cooling required for a single unit.
Built-in auxiliaries and communication
This MCCB ships with 2 auxiliary switches (HQ type) and an undervoltage release already integrated — no separate add-on modules to order and install. The communication function is onboard, meaning it can report status and trip events to a controller or BMS without a separate gateway module. That saves a DIN-rail slot and wiring time compared to a base breaker plus external accessory kit.