279-1-33909-60 is a single-pole hydraulic magnetic circuit protector from the 279 series, designed for communication applications. This circuit breaker utilizes the hydraulic-magnetic principle for accurate and reliable circuit protection, combining power switching with protection in a compact unit. The 279 series is available only with DC delays and supports DC voltage ratings up to 160Vdc with current ratings from 0.1 to 100 amperes. The unit features moisture and fungus resistance through specialized finishes and treatments. Common applications include communication equipment and branch circuit protection where reliable DC circuit protection is required.