The Siemens SENTRON 3VA1163-6MH32-0AF0 is a 3-pole molded case circuit breaker (MCCB) specifically designed for starter protection — meaning its thermal-magnetic release curve is shaped to coordinate with motor contactors and overload relays, clearing downstream faults before the contactor welds shut. Rated 63 A continuous at 40 °C, it holds that full rating through 50 °C before derating begins (62 A at 55 °C, 60 A at 65 °C), which gives panel builders thermal headroom in enclosed, non-ventilated assemblies. Breaking capacity is the headline spec here: 220 kA at 240 VAC, 154 kA at 415 V, and 121 kA at 440 V. At 500 V and 690 V the rating drops to 7.5 kA — still sufficient for most industrial motor branch circuits at those voltages, but the sharp knee means this breaker is optimised for 400 V-class distribution where high fault current is the norm. The 800 V rated insulation voltage confirms it is built for 690 V line-to-line systems with margin.
Integration & Mounting
Dimensions are 76.2 mm wide (3 in), 130 mm tall (5.12 in), and 70 mm deep (2.76 in). The 3-pole footprint is standard for SENTRON 3VA frame sizes in this rating class; it mounts directly onto a DIN rail or panel-mount adapter plate. The auxiliary switch configuration — 1 auxiliary switch + 1 trip alarm switch HQ — is factory-integrated, so no add-on module occupies additional DIN space. Power loss at rated load is 17.3 W maximum, which factors into enclosure thermal calculations for non-ventilated stainless-steel panels.
Compliance & Documentation
As a SENTRON-series MCCB, the 3VA1163-6MH32-0AF0 is designed and tested to IEC 60947-2 and UL 489 standards for molded case circuit breakers. The TM120M thermal-magnetic release provides fixed thermal and fixed magnetic trip settings, with a trip indicator on the front face for visual status. No undervoltage release, no ground-fault monitoring, and no communication function are included on this variant — it is a pure power distribution and motor branch-circuit protection device. Operating temperature range is -25 °C to +70 °C; storage range extends from -40 °C to +80 °C.