Line protection MCCB with shunt trip and auxiliary switches
The Siemens SENTRON 3VA1020-3ED32-0JC0 is a 3-pole molded case circuit breaker rated for 20 A continuous current across the ambient range from 40 °C to 70 °C, with only a 1 A derating at the top end (19 A at 60–70 °C). Its interrupting capacity scales with system voltage: 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 — giving you headroom for high-fault panels in industrial distribution.
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard SENTRON 3VA footprint that fits existing DIN-rail or panel-mount cutouts for the 3VA family. The 3-pole body leaves room for side-mounted auxiliary switch blocks without crowding adjacent devices.