What this MCCB brings to a panel
The Siemens SENTRON 3VA1163-5EE32-0AG0 is a 3-pole molded case circuit breaker rated 63 A at 40 °C with a TM220 thermal-magnetic release. The interrupting rating hits 187 kA at 240 V, 121 kA at 415 V, and still holds 17 kA at 690 V — that's the kind of SCCR headroom that lets you coordinate downstream without cascading failures on a high-fault bus. Insulation voltage is rated 800 V, so it handles 480/600 V panels comfortably. This is a line-protection design — no undervoltage release, no ground-fault monitoring, no communication module. The TM220 release gives you fixed thermal and magnetic trip settings; you're not dialing in curves, you're trusting a proven bimetal and solenoid pair for motor or feeder duty.
Sizing and derating in the enclosure
At 63 A and 40 °C ambient, this breaker holds its full rating. Derate linearly: at 55 °C it's 62 A, at 70 °C it's 58 A — still usable in a warm panel if you keep the fill factor reasonable. The maximum power loss is 17.3 W, so plan for ventilation if you're stacking several in a sealed enclosure. Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that drops into most SENTRON mounting plates and busbar systems. The auxiliary switch configuration is 1 auxiliary switch + 1 trip alarm switch HP, which gives you a remote status signal without extra wiring.