The 4230-T120-K0BE-20A are double pole thermal-magnetic miniature circuit breakers (MCBs) in accordance with EN 60947-2, UL 1077 and UL 489 for DIN rail mounting, with toggle actuation, visual status indication and high rupture capacity. Typical applications are protection of cables, motors, generators and transformers, thyristors and silicon rectifiers. Protection of computers and their peripheral equipment, industrial process control systems, telecommunications equipment and power supplies.