KD1-20 is a miniature hydraulic-magnetic circuit breaker designed for supplementary protection in electrical systems. It is rated for 20 amperes continuous current and operates at 250 Vac maximum, making it suitable for a wide range of low-voltage applications. The breaker features a compact PROPAK design available in 1- or 2-pole configurations with quick-connect terminals for fast installation. It includes mounting hardware and can be mounted on panels with hole sizes accommodating panel thicknesses from 1/32 inch to 1/8 inch. This breaker is commonly used in control circuits, instrumentation, and equipment protection where reliable overcurrent and short-circuit protection is required in space-constrained installations.