The Siemens 3VA1112-5MH32-0AF0 is a 3-pole IEC molded-case circuit breaker on a 160 A frame, rated 125 A continuous with a TM120M thermal-magnetic trip unit. This variant is configured for starter protection: the magnetic short-circuit pickup is adjustable from 5 to 15 times In (625–1875 A), and it ships without overload protection, relying on a separate overload relay in the motor starter circuit.
The 3-pole form factor fits standard 160 A frame cutouts. The auxiliary switch (HQ) and trip alarm switch (HQ) provide remote status feedback for PLC or SCADA inputs — useful for fault logging in automated lines.