What this 3VA1 frame 160 breaker carries
The Siemens 3VA1112-6MH32-0JC0 is a 3-pole IEC frame 160 circuit breaker with breaking capacity class H — meaning it interrupts 70 kA at 415 V without the arc climbing into adjacent gear. That's the high-end short-circuit rating for this frame size, sized for panelboards and motor control centers where fault current is stiff. Rated In of 125 A with a TM120M thermal-magnetic trip unit set for starter protection; the magnetic pickup Ii is adjustable 5–15× In, so you dial it to ride through motor inrush without nuisance tripping. No overload protection in this variant — it's a short-circuit-only device, paired with an external overload relay on the starter.
Integrated accessories
Factory-fitted with a shunt trip (STL) rated 110–127 V DC and AC 50/60 Hz — that's the undervoltage-release coil you energize to remotely trip the breaker. Two auxiliary switches (HQ) report contact position back to the PLC or status lamp. The nut keeper kit keeps the busbar fasteners from backing off under vibration; standard on this order code. All of it ships as a single assembly, no loose parts to lose on the panel floor.