The Siemens 3VA1163-6MH32-0AG0 is a 3-pole IEC frame 160 circuit breaker from the 3VA1 series, rated for 63 A with a breaking capacity class H delivering 70 kA at 415 V. It is configured as a starter protection device using a TM120M thermal-magnetic release, but without integrated overload protection — it provides short-circuit protection only, with an adjustable instantaneous trip setting (Ii) from 5 to 15 times In. The unit includes a nut keeper kit, one auxiliary switch (HP), and one trip alarm switch (HP).
What the ratings mean for fit
The 70 kA Icu at 415 V places this in the high-breaking-capacity class (class H) for the 3VA1 frame, meaning it can safely interrupt fault currents up to that level without upstream cascading — critical for panels with high available fault current. The TM120M release is a thermal-magnetic type; because overload protection is omitted, this breaker is intended solely for short-circuit backup in a motor starter combination where a separate overload relay handles the thermal protection. The adjustable Ii of 5–15 x In (315–945 A instantaneous pickup) lets you coordinate with downstream contactors and relays. The nut keeper kit secures the breaker on the DIN rail or mounting plate — standard for 3VA1 frames. The auxiliary switch and trip alarm switch provide remote status feedback (open/closed and tripped), which is typical for PLC or SCADA integration in motor control centers.