What this MCCB delivers in the panel
The Siemens 3VA2163-5HL36-0AB0 is a 3-pole SENTRON molded case circuit breaker rated for 63 A continuous current at 40 °C, with an ETU320 electronic trip unit providing line protection. It handles fault interruption up to 187 kA at 240 V and 121 kA at 415 V — numbers that tell you it's built for high-fault-capacity main or feeder duty in an industrial distribution panel, not a branch-rated afterthought. The 63 A rating holds across 40 °C to 50 °C without derating; above that it steps down to 60.6 A at 55 °C and 53.6 A at 70 °C. If your panel ambient runs hot, plan for that thermal curve rather than assuming full continuous current.
Trip unit and auxiliary contacts
The ETU320 is an electronic overcurrent release — no voltage trigger, no undervoltage release, no ground-fault monitoring on this variant. It ships with 2 auxiliary switches (HP type) for status feedback to a PLC or annunciator. If you need communication or phase-failure detection, this base version doesn't carry those modules; the 3VA platform offers them on other order codes. The breaker is rated for 20,000 mechanical/electrical endurance cycles — standard for a 63 A frame in this class. Maximum power loss is 4 W, which keeps heat manageable inside a sealed enclosure.
Physical fit and environment
Dimensions: 105 mm wide, 181 mm high, 86 mm deep — a 3-pole MCCB that fits standard SENTRON mounting footprints. Front protection is IP40, so it's fine inside a cabinet but not rated for washdown. Operating range is -25 °C to 70 °C; storage from -40 °C to 80 °C. Rated insulation voltage is 800 V, so it's suitable for 690 V line-to-line systems. The interrupting capacity drops to 4.25 kA at 690 V — that's the limit of the frame at that voltage; verify coordination with upstream devices if you're running a 690 V distribution.