SENTRON 3VA1 MCCB — 125 A, TM240, Undervoltage Release
The Siemens 3VA1112-4EF32-0BA0 is a SENTRON-series 3-pole molded case circuit breaker (MCCB) rated for line-protection duty, carrying a continuous current of 125 A at 40 °C ambient and a TM240 thermal-magnetic trip unit. Breaking capacity is the headline spec here: 121 kA at 240 V, dropping to 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. At 690 V the 11.9 kA rating still clears most industrial distribution faults, but verify your point-of-fault current against the 11.9 kA ceiling. The breaker includes a factory-fitted undervoltage release (UVR), designated as an undervoltage release (UVR) auxiliary release.
Thermal Derating & Panel Fit
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. No trip indicator on this variant — you'll need to check the handle position or add an auxiliary switch for remote status.