The Siemens SENTRON 3VA1120-6EF32-0HH0 is a 3-pole molded case circuit breaker (MCCB) rated for 20 A continuous current at 40 °C through 50 °C, with a thermal-magnetic TM240 overcurrent release. Front IP40 protection suits indoor panel mounting.
The 3VA1120-6EF32-0HH0 delivers 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 690 V. The 690 V rating drops sharply, so verify the line-to-line voltage at the installation point.
Thermal derating curve
Above that, derate linearly: 19.2 A at 55 °C, 18.8 A at 60 °C, 18.4 A at 65 °C, and 18 A at 70 °C.