The TM240 thermal-magnetic release handles overloads and short circuits without external trip electronics — a straightforward choice for fixed-load feeders where you want field-proven reliability, not configurable curves. At 240 V it interrupts 121 kA; at 415 V it still holds 75.6 kA. Those numbers drop to 52.5 kA at 440 V and 11.9 kA at both 500 V and 690 V — so for a 480 V panel you are working with 52.5 kA of interrupting rating, which covers most industrial service-entrance and feeder applications.
Four-pole width means it occupies four module spaces on a DIN rail — plan the gland plate and busbar drop accordingly. IP40 on the front keeps dust out of the mechanism; no special sealing for washdown environments. Power loss is 38 W at full load. That heat has to leave the enclosure — in a sealed stainless cabinet you will want to check the thermal rise against the 70 °C operating maximum and the -25 °C minimum.