What this 3VA1 breaker carries
The Siemens 3VA1110-5MH32-0KA0 is a 3-pole IEC molded case circuit breaker on the 160 A frame, rated 100 A continuous with a 55 kA breaking capacity (Icu) at 415 V AC — class M, meaning it handles moderate fault levels typical of industrial distribution and motor branch circuits without requiring a current-limiting upstream device. The TM120M thermal-magnetic trip unit provides starter protection: the thermal element tracks motor heating curves, while the magnetic short-circuit pickup is adjustable from 5 to 15 x In. It ships with a factory-installed shunt trip (STL) rated 220–250 V DC or 208–277 V AC, plus a nut keeper kit for secure terminal retention — both reduce field assembly steps.
The adjustable Ii range (5–15 x In) lets you set the magnetic trip high enough to avoid nuisance trips on motor inrush while still protecting the cable against bolted faults.
The shunt trip coil draws on the control circuit (220–250 V DC or 208–277 V AC); verify the control transformer and fuse sizing can support the inrush without dropping below the dropout voltage of the coil.