SENTRON 3VA1112-6EF32-0DA0 — 125 A MCCB with undervoltage release
It carries a TM240 thermal-magnetic trip unit and an integrated undervoltage release (UVR), so it drops the load if supply voltage falls below the release threshold — useful for motor branch circuits or safety disconnects where you want automatic shutdown on loss of control power.
Breaking capacity across voltage levels
Breaking capacity varies significantly with system voltage: 220 kA at 240 V, 154 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. That 220 kA at 240 V is high enough for most North American 240/120 V panelboards with large transformer feeds; the 17 kA at 690 V still covers standard 690 V industrial distribution.
Current derating and thermal limits
Rated 125 A from 40 °C through 50 °C ambient, then derates to 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C. Maximum power loss is 30.6 W at rated current, which matters for enclosure thermal calculations.
Undervoltage release and trip features
No voltage trigger or communication function on this variant. No trip indicator. The TM240 release is thermal-magnetic: thermal element for overload protection, magnetic for short-circuit. This is a line-protection design, not a motor-protection or ground-fault version.
Width 76.2 mm (3 in), height 130 mm (5.12 in), depth 70 mm (2.76 in).