The Siemens 3VA1020-3ED36-0JH0 is a 3-pole SENTRON molded case circuit breaker rated 20 A continuous at 40 °C, with a breaking capacity of 75.6 kA at 240 V AC.
Breaking capacity by voltage — where it clears
This breaker's interrupting rating drops as system voltage climbs: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at both 500 V and 690 V.
Rated 20 A from 40 °C through 55 °C ambient. At 60 °C it drops to 19 A, and holds there through 70 °C. In a packed enclosure with internal temperature rise, plan for the 19 A ceiling if the panel ambient exceeds 55 °C.
Auxiliary contacts and shunt trip included
The shunt trip lets a safety PLC or E-stop circuit drop the breaker without a manual reset cycle.
