Siemens 5SK9011-8KK27 Circuit Breaker

Siemens 5SK9011-8KK27 is a 1-pole miniature circuit breaker designed for auxiliary circuits in control panels, delivering overload and short-circuit protection with an integrated 1NO/1NC auxiliary contact for status signaling. It is rated for 6 A and supports AC operation up to 250 VAC and DC operation up to 60 VDC, enabling protection and monitoring of small automation circuits in a single device. This variant belongs to the 5SK9xxx/SENTRON family and provides a single-pole protection alongside an auxiliary contact pair (1NO/1NC), making it suitable for industrial control applications that require both reliable disconnection and signaling capability. The exact 5SK9011-8KK27 part is documented by Siemens distributors and catalog listings for legacy and specialty installations, reflecting its use in retrofits and machines that need an auxiliary indicator tied to the protection circuit.