The TM240 thermal-magnetic release handles overloads and short-circuits without external control power — a straightforward fit for main or feeder protection where communication functions aren't required. Breaking capacity is voltage-dependent: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 11.9 kA at 690 V. The 248 mm height, 184 mm width, and 110 mm depth fit standard SENTRON mounting patterns — verify busbar spacing against your existing panel layout.
Where it lands in the SENTRON family — line protection, no frills
It's the thermal-magnetic workhorse for main or feeder breakers where you don't need electronic trip units or remote monitoring. The 4-pole configuration covers three-phase-plus-neutral or three-phase with a switched neutral.