Siemens 3VA1112-4EE32-0AA0 — 125 A SENTRON MCCB for Line Protection
Breaking capacity is 75.6 kA at 415 V and 121 kA at 240 V, which provides solid fault-clearing headroom for high-fault installations. The TM220 release combines a thermal element for overload protection with a magnetic element for short-circuit response, tuned for cable and busbar protection rather than motor starting.
Panel Integration — Footprint and Environment
Dimensions are 130 mm height, 76.2 mm width, and 70 mm depth — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures. Maximum power dissipation is 28.1 W, which should be factored into enclosure thermal calculations, especially when multiple breakers are ganged.
Coordination Note — TM220 Release and Selectivity
The TM220 release is a fixed thermal-magnetic design with no electronic adjustment or communication function. For selectivity studies, the magnetic trip threshold is factory-set; consult the device manual for coordination curves with upstream or downstream SENTRON breakers. No undervoltage release or shunt trip is integrated on this variant.