What this 3VA1 breaker carries
The Siemens 3VA1163-6MH32-0KC0 is a 3-pole IEC frame 160 circuit breaker with a 63 A thermal-magnetic release (TM120M) and a high breaking capacity class H rating of Icu=70 kA at 415 V AC. It is configured for starter protection — meaning the TM release provides short-circuit protection only, with no overload protection function built in. The adjustable instantaneous trip (Ii) range is 5 to 15 times In (315 A to 945 A), sized for motor branch circuits where a separate overload relay handles the thermal curve.
Integrated accessories and panel fit
This variant ships with a shunt trip (STL) rated for 220-250 V DC or 208-277 V AC, plus two HQ auxiliary switches. The nut keeper kit is included — that's the hardware that keeps the terminal nuts captive during panel wiring, a small time-saver on the assembly line. Mounts on standard DIN rail in the 3VA1 footprint; the frame 160 form factor is common across the 3VA series, so panel cutouts and busbar layouts transfer if you swap between frame sizes.