It carries a TM240 thermal-magnetic release, meaning the thermal element handles overloads and the magnetic element clears short-circuits, no electronic trip unit, no communication, no ground-fault monitoring. At 240 V AC the interrupting capacity hits 187 kA; at 415 V it's 121 kA, at 440 V it's 75.6 kA, and at 500/690 V it holds at 17 kA.
Thermal rating and what it means for the panel
Rated current is 20 A and it holds that rating from 40 °C through 55 °C ambient without derating. At 60 °C it drops to 19 A, and it stays at 19 A through 70 °C. Above that you lose 1 A. The power loss at rated load is 12 W, which is modest for a 4-pole MCCB and won't drive a significant temperature rise inside a well-ventilated panel.
The 101.6 mm (4-inch) width for a 4-pole breaker is standard for the SENTRON 3VA frame size — it occupies the same footprint as other 4-pole 3VA breakers in the same current range, so a panel laid out for a 3VA125 or 3VA111 will accept this unit without re-drilling the mounting plate.