Siemens 5SX21C2 Control Circuit Breaker 2 Amp

Siemens 5SX21-C2 is a single-pole miniature circuit breaker designed for DIN-rail mounting in control panels and machine enclosures. It is rated for 230/400 VAC operation with a fixed 2 A current rating and a Type C thermal-magnetic trip curve for standard overload and short-circuit protection. The device offers a 6 kA interrupting rating and uses screw-terminal connections, making it suitable for compact control-wiring environments. With dimensions around 18 x 62 x 90 mm, it fits neatly alongside other DIN-rail modules, and its compact form supports space-conscious panel layouts. Common applications include protection of low-voltage control circuits, such as motor starters, sensors, and logic circuits within industrial automation panels. Although typically installed in industrial environments, it is also used in commercial control systems.