The Siemens SENTRON 3VA2063-5KP32-0KH0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C. Designed for line protection, it carries a massive 187 kA interrupting capacity at 240 V, dropping to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 3 kA at 690 V. That's the kind of fault-current muscle that keeps a feeder or main panel coordinated when a bolted fault hits.
What the interrupting ratings mean on your panel
At 240 V the breaker clears 187 kA — that is a very high fault-current rating for a 63 A frame, so it handles high-capacity transformer secondaries or large busway feeds without needing an upstream current-limiting fuse. At 415 V it still holds 121 kA, which covers most industrial distribution in 400 V class systems. The 3 kA at 690 V is a residual rating for the rare 690 V line; if that's your supply voltage, the breaker still works but you need to verify the available fault current stays under that limit.
Built-in communication and auxiliary switching
This MCCB includes a communication function, so it can report status or trip events to a PLC or BMS — useful for remote monitoring without adding a separate I/O module. It ships with two auxiliary switches plus one trip alarm switch (HQ type), giving you three dry contacts for status feedback. A shunt trip (STL) release is built in, allowing a remote emergency-stop or undervoltage signal to open the breaker. There is a voltage trigger and a mechanical trip indicator, so you can see at a glance whether it has tripped on a fault.
Physical fit and panel integration
Dimensions are 105 mm wide by 181 mm tall by 86 mm deep. That 86 mm depth is shallow enough for most 200 mm deep enclosures, leaving room behind the door for wiring gutters. The 3-pole footprint is standard for this frame size; it mounts on a DIN rail or bolts directly to a panel backplate. At 5.4 W maximum power loss, it won't drive much heat into the enclosure — you can pack other gear around it without worrying about derating the breaker itself.