The Siemens SENTRON 3VA1163-4EF32-0BH0 is a 3-pole molded case circuit breaker (MCCB) rated 63 A at 40 °C, with a breaking capacity of 121 kA at 240 V AC. This is a line-protection design — meaning it is intended for cable and busbar protection, not direct motor overload protection (that would require a separate overload relay or a motor-protective breaker). The auxiliary switch block provides two auxiliary contacts plus one trip-alarm contact, enough to signal status and trip to a PLC or indicator lamp without an add-on module.
That 76.2 mm width (3 inches) is the standard 3-pole MCCB footprint for this frame size — it fits the same panel cutout and DIN-rail adapter as other SENTRON 3VA1 breakers. Power loss is 19.8 W maximum, so thermal rise inside the panel is modest; no forced cooling needed in most layouts.
The part carries a trip indicator for quick visual identification of a tripped breaker. No ground-fault monitoring version is fitted — this is a straight thermal-magnetic or electronic trip unit (line protection).
