125 A MCCB with 187 kA interrupting capacity — the selectivity anchor for high-fault panels
At 415 V it still clears 121 kA, and at 440 V it holds 75.6 kA. The 4-pole configuration covers three-phase plus neutral, with 100 % N-conductor protection.
Above that it derates linearly: 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C. Dimensions are 101.6 mm wide by 130 mm tall by 70 mm deep; the 4-pole width matches the standard 4-module MCCB footprint on a DIN rail or bolted bus. Maximum power loss is 28.1 W — relevant for enclosure thermal calculations when grouping several breakers.
Approvals and compliance documentation
As a SENTRON series MCCB, the 3VA1112-5GF42-0AA0 carries IEC 60947-2 certification for molded case circuit breakers. The manufacturer provides RoHS and REACH declarations through its standard documentation portal. For UL/CSA listings, verify the specific file number against the Siemens 3VA UL mark database — the IEC-rated variant may differ from a UL 489-listed version.