What this MCCB carries and where it fits
The Siemens SENTRON 3VA1020-3ED36-0HA0 is a 3-pole molded case circuit breaker (MCCB) rated for 20 A continuous current across the ambient range from 40 °C to 55 °C, derating to 19 A at 60 °C through 70 °C. Breaking capacity hits 75.6 kA at 240 VAC, 52.5 kA at 415 VAC, and 32 kA at 440 VAC — numbers that tell you this breaker handles high-fault panels without cascading upstream. The TM210 thermal-magnetic release gives fixed thermal and magnetic trip settings, no adjustment knobs. A shunt trip (STL) auxiliary release is built in, so you can remote-trip from a safety circuit or E-stop string. No undervoltage release, no ground-fault monitoring, no communication module — this is a straight line-protection breaker with a remote-trip option.
Panel fit and integration
The 3VA1020-3ED36-0HA0 measures 76.2 mm wide, 130 mm tall, and 70 mm deep — a standard 3-pole MCCB footprint that drops into SENTRON mounting bases and busbar systems. Rated insulation voltage is 800 V, so it's comfortable on 480/600 V distribution panels. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Max power loss is 12 W, which matters for enclosure thermal calculations when you stack multiple breakers. No trip indicator on the front face — you'll need a remote status contact or a visual check at the handle position.