Siemens SENTRON 3VA1025-3ED32-0BA0 — 25 A MCCB with Undervoltage Release
Breaking capacity is voltage-dependent: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at both 500 V and 690 V. Dimensions are 70 mm deep, 76.2 mm wide, and 130 mm high — a standard footprint for SENTRON 3VA frame sizes, allowing direct panel integration without re-drilling in most retrofit scenarios.
At 55 °C it derates to 24 A, holds 24 A at 60 °C, then steps to 23 A at both 65 °C and 70 °C. This derating curve is typical for thermal-magnetic MCCBs and must be factored into panel design when the breaker is enclosed or adjacent to other heat sources.
The 3-pole design occupies 76.2 mm (3 in) of rail width. Spring-cage or screw terminals accept copper conductors sized per the 25 A rating; torque settings follow the manufacturer's installation instructions. The undervoltage release coil must be wired to a separate control voltage source — verify polarity and coil rating against the control circuit.