What this breaker carries
The Siemens 3VA1163-6MH32-0BC0 is a 3-pole IEC frame 160 molded case circuit breaker rated for 63 A continuous current with a 70 kA interrupting capacity at 415 V AC — class H breaking capacity, meaning it clears high-fault currents without cascading upstream in a panel. It ships with a TM120M starter-protection trip unit (thermal-magnetic, fixed thermal, adjustable magnetic) set for motor branch-circuit duty, plus an undervoltage release (UVR) at 24 V DC and two HQ auxiliary switches for status feedback. The nut keeper kit is included on the line-side terminals — a detail that saves a field-service call when the panel builder torques down the bus bars.
What the ratings mean for fit
The 70 kA Icu at 415 V puts this in the H (high) breaking capacity class — it handles fault currents typical of large transformer-fed switchboards without needing a current-limiting upstream breaker. The TM120M trip unit has a fixed thermal rating of 63 A and an adjustable magnetic pickup range of 5 to 15 times In. The 24 V DC undervoltage release drops the breaker on loss of control voltage.