Siemens 5SX22D13 Circuit Breaker

Siemens 5SX22D13 is a two-pole molded-case circuit breaker from the 5SX family, designed to protect 2-pole circuits in 400 V AC distribution panels. It is rated for up to 13 A and provides a thermal-magnetic trip with a curve C, offering a short-circuit breaking capacity of up to 6 kA at 400 V. This DIN-rail-mountable breaker is intended for general-purpose protection of feeders and small motor circuits in commercial installations, and it aligns with Siemens mounting footprints in the 5SX/5SL family for easy panel integration. When selecting this device, ensure the load current remains within 13 A and that upstream protection and conductor sizing meet applicable standards. The compact, 2-pole design fits standard industrial enclosures and supports common applications such as lighting circuits, control panels, and low-voltage feeders where reliable protection at 400 V is required.