Siemens 5SK9011-1KK26 is a 1-pole molded‑case circuit breaker designed for auxiliary circuits with a short‑circuit release. It carries a 4 A rating and is suitable for circuits operating at up to 250 VAC or 60 VDC, making it appropriate for protecting low‑voltage control circuits in panels and automation gear. Manufactured by Siemens (ITE/Siemens), this unit is part of the 5SK9 family of miniature molded‑case breakers and provides dedicated protection for auxiliary circuitry against overload or fault conditions in control applications.
