The Siemens SENTRON 3VA1120-5ED16-0AA0 is a 1-pole molded case circuit breaker (MCCB) rated for line protection, with a TM210 thermal-magnetic overcurrent release. It carries a continuous current of 20 A at 40 °C and holds that rating steady through 55 °C, only derating to 19 A at 60 °C and above — useful for warm panel environments where thermal margin matters. Interrupting capacity is 121 kA at 240 V AC and 9 kA at 415 V AC, which covers most commercial and light industrial fault levels. The 415 V rating is the one to check for 400 V line-side coordination studies.
Panel Fit & Integration
Width is 25.4 mm (1 inch), depth 70 mm (2.76 in), height 130 mm (5.12 in) — a standard single-pole MCCB footprint that drops into most DIN-rail or panel-mount enclosures without re-spacing. Front face is IP40 rated, so it's fine for dry indoor panels but not washdown zones.