The Siemens 3VM1125-3EE42-0AA0 is a 4-pole IEC frame 160 circuit breaker rated for line protection. Its TM220 thermal-magnetic trip unit gives you an overload Ir adjustable from 18 A to 25 A and a fixed short-circuit pickup at 12.8 × In (320 A at the 25 A setting). The interrupting capacity hits 25 kA at 415 V — that's the N (normal) breaking class, good for most distribution panels that aren't feeding a high-fault transformer. The N conductor is left unprotected on this variant; the nut keeper kit keeps the lug hardware from walking loose under vibration in a panel or enclosure.
Compliance & documentation
RoHS compliant since 01-06-12. REACH Article 33 duty applies — lead (CAS 7439-92-1) above 0.1% w/w in the candidate list. Export control is AL N / ECCN N, so no special licensing for most destinations. Packing dimensions: 150 x 119 x 116 mm.