Line protection MCCB with TM240 release
The 3VA1125-3EF46-0AA0: Breaking capacity is rated per voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. This gives you selectivity headroom for most industrial distribution panels without needing a larger-frame upstream breaker.
Thermal derating and enclosure fit
The 3VA1125 holds its full 25 A rating up to 50 °C, then derates to 24 A at 55–60 °C and 23 A at 65–70 °C. Panel builders should account for this when grouping breakers in a sealed enclosure — the 8.5 W maximum power loss per pole stack adds up in a crowded gland plate. Dimensions are 101.6 mm wide, 130 mm high, and 70 mm deep — a 4-pole footprint that fits standard SENTRON mounting bases. IP40 on the front face is typical for panel-mount breakers; the protected side is inside the enclosure.