Key ratings and what they mean for fit
The Siemens 3VM1110-4EE46-0AA2 is a 4-pole IEC molded-case circuit breaker on a 160 A frame, line-protection version with a TM220 thermal-magnetic trip unit. Its headline rating is a 36 kA breaking capacity (Icu) at 415 V AC — this is the class S rating, meaning it safely interrupts faults up to that level without upstream devices needing to clear the fault first. For a panel builder, that SCCR headroom lets you place this breaker closer to the load without worrying about cascading failure. The continuous current rating (In) is 100 A, with an adjustable overload protection band (Ir) from 70 A to 100 A via the TM220 dial. The short-circuit magnetic trip (Ii) is fixed at 10 x In, so 1000 A instantaneous pickup. That 10x multiplier is typical for line-protection (cable/feeder) duty — not motor-starting, where you'd want a higher multiplier to ride through inrush.
Deployment context
This breaker mounts in a standard distribution panel or MCC on a DIN rail or bolted directly to a backplate. The 4-pole configuration (3 phases + unprotected neutral) suits 3-phase 4-wire systems like TN-S or TN-C-S where the neutral is not switched. Terminal connections accept lug or busbar — verify lug size against your cable cross-section at order time.