The Siemens SENTRON 3VA1112-4EF36-0JH0 is a 3-pole molded case circuit breaker rated 125 A continuously at 40 °C, with an interrupting capacity of 121 kA at 240 VAC.
At 415 V the interrupting rating drops to 75.6 kA, at 440 V to 52.5 kA, and at 500 V and 690 V to 11.9 kA. The thermal continuous rating holds at 125 A from 40 °C through 50 °C, then derates to 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C.
Auxiliary and release configuration
The shunt trip allows a safety relay or E-stop circuit to open the breaker remotely, which is common in emergency-off circuits where the MCCB serves the main disconnect.
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard SENTRON 3VA frame size that mounts on a DIN rail or panel-mount adapter. The 76.2 mm width (3 inches) is the standard 3-pole MCCB footprint for this series, so it drops into existing 3VA panel layouts without re-drilling. Maximum power loss is 28.1 W, which should be factored into enclosure thermal calculations.