What this 20 A MCCB delivers
The Siemens SENTRON 3VA1020-4ED32-0AF0 is a 3-pole molded case circuit breaker rated for 20 A continuous current at 40 °C through 50 °C, with a TM210 thermal-magnetic release for line protection. Its interrupting capacity hits 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — numbers that matter when coordinating downstream with a transformer or a motor branch that can dump serious fault current. The 15 000-cycle latching endurance aligns with the SENTRON line's mechanical life for a 20 A frame.
The 3VA1020-4ED32-0AF0 fits a standard 3-pole MCCB footprint: 76.2 mm wide, 130 mm tall, 70 mm deep. It mounts to a DIN rail or panel-mount baseplate.