LELK1-1RS4-30452-15 is a single-pole hydraulic magnetic circuit protector designed for low-cost power switching and reliable circuit protection in DC applications. Based on the IAL/LEL series specifications, this device operates at 65V DC with a current rating range of 0.02 to 100 amperes and supports multiple delay configurations (51, 52, 53, 59) for thermal response customization. The protector features a panel thickness tolerance of ±0.005 inches (±0.13 mm) and a dimension "A" of 0.760 ± 0.007 inches (19.30 ± 0.18 mm) for single-pole mounting. It provides accurate circuit control with selectable trip characteristics across various current multiples (150% to 1000% of rated current), making it suitable for equipment requiring international compliance and reliable overcurrent protection in industrial and commercial power distribution systems.