The Siemens SENTRON 3VA1020-4ED32-0HH0 is a 3-pole molded case circuit breaker rated for a continuous current Iu of 20 A, with a TM210 thermal-magnetic overcurrent release — the '210' designates the release family tuned for this frame size. The 20 A rating holds flat from 40 °C to 50 °C, then derates to 19.2 A at 55 °C, 18.8 A at 60 °C, 18.4 A at 65 °C, and 18 A at 70 °C, so in a warm panel the usable current drops; size the load circuit for the actual ambient, not the nameplate. Breaking capacity runs 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V.
Auxiliary and release configuration
This variant ships without an undervoltage release, without ground fault monitoring, without phase failure detection, and without communication function. The only auxiliary release fitted is the shunt trip (STL), which uses a separate voltage trigger to trip the breaker remotely. The integrated auxiliary trip order code is 3VA9688-0BL30 — order that separately if you need a replacement or spare trigger block. Mechanical endurance is rated at 15,000 cycles, which covers typical panel-switching duty on feeder or branch circuits.