The Siemens 3VM1110-3EE46-0AA2 is a 4-pole molded case circuit breaker (MCCB) in the 3VM1 IEC frame 160 series, rated 100 A with a breaking capacity of 25 kA at 415 V (class N). For a 415 V distribution board feeding motor control centers or lighting panels, that's sufficient for most secondary-side faults behind a transformer.
The TM220 overload trip unit gives an adjustable thermal-magnetic curve: overload protection Ir is settable from 70 A to 100 A via a dial on the front face, so you can match the breaker to the actual continuous load without swapping the unit. The short-circuit magnetic pickup Ii is fixed at 10 x In (1000 A for the 100 A frame). That 10x multiplier is typical for line protection — it avoids nuisance tripping on motor inrush while still clearing a bolted fault fast. The N conductor is unprotected (solid neutral), meaning this breaker switches and protects only the three phases; the neutral bar passes through unswitched. That's standard for a 4-pole breaker used in a TN-S or TN-C-S system where the neutral is bonded at the source.