Four poles handle three-phase plus neutral, or a second parallel path in DC networks per the 3VA device manual. Rated 25 A continuous at 40 °C ambient, it carries that current without derating up to 50 °C; at 55 °C it still holds 24 A, and at 70 °C it delivers 23 A — so a warm enclosure doesn't force a costly upsizing. Breaking capacity is the headline: 220 kA at 240 V AC, 154 kA at 415 V, and 121 kA at 440 V. Those numbers mean it clears high-fault currents without rupturing — critical for panels fed by large transformers or close to the utility service entrance.
Dimensions are 101.6 mm wide by 130 mm tall by 70 mm deep — a 4-inch wide footprint that fits standard Siemens SENTRON mounting plates and busbar systems. Mount it in a dry indoor panel; no gland-plate or gasket concerns. The TM240 overcurrent release is a thermal-magnetic type — thermal element handles overloads, magnetic coil handles short-circuit trips. It's a straight protection device: wire it in, set the load, and it trips when it needs to.