The SENTRON 3VA1112-4EF32-0DA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 125 A from 40 °C through 50 °C, derating to 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C. Its TM240 thermal-magnetic release handles overload and short-circuit protection without a separate trip indicator or voltage-trigger function. The interrupting capacity reaches 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V — figures that define the fault-current headroom for panel coordination studies.
SCCR and selectivity
With 121 kA at 240 V and 75.6 kA at 415 V, this MCCB sits above typical distribution panel SCCR requirements for most commercial and light industrial installations. The 800 V rated insulation voltage supports use in 690 V line-to-line systems, though the 11.9 kA breaking capacity at that voltage means upstream current-limiting fuses or a higher-rated breaker may be needed for high-fault locations. The undervoltage release (UVR) integrated into the auxiliary release design provides a clean trip on loss of control voltage — common in emergency-stop chains or undervoltage protection schemes. No communication module is fitted, so this is a standalone protective device, not a smart breaker.
Physical fit and panel integration
The breaker measures 70 mm deep, 76.2 mm wide, and 130 mm high. That 3-inch width and 2.76-inch depth fit standard MCCB cutouts in SENTRON distribution panels and most third-party enclosures designed for 3-pole 125 A frames. The basic switch supplied is order code 3VA11124EF320AA0 — relevant if you need a replacement switching mechanism or are cross-referencing internal subassemblies. Maximum power loss is 30.6 W, which should be factored into enclosure thermal calculations, especially when multiple breakers are ganged.