The Siemens SENTRON 3VA1120-6EF32-0KA0 is a 3-pole molded case circuit breaker (MCCB) rated for 20 A continuous current at 40 °C, with a massive 220 kA breaking capacity at 240 V AC — that's the SCCR headroom you need for high-fault utility feeds or transformer secondaries where a standard 65 kA breaker would cascade upstream. The TM240 overcurrent release gives thermal-magnetic protection with a fixed 20 A rating and adjustable magnetic pickup (not detailed here, but typical for the SENTRON TM series).
Rated 20 A from 40 °C through 55 °C, then derates to 19 A at 60 °C through 70 °C. That's a clean thermal curve — no derating step until 60 °C, which simplifies panel design for most industrial environments. At 130 mm tall, it leaves room for auxiliary contacts above or below in a typical distribution board.