AP1-1-61-352 is a fully sealed, single-pole magnetic circuit protector designed for 50/60Hz operation with short time delay characteristics and series trip configuration. This hydraulic magnetic circuit protector combines power switching with accurate, reliable circuit protection featuring inverse time delays and trip-free operation, maintaining consistent trip current across a wide temperature span unlike thermal protectors. The unit is rated for nominal current operation with trip times ranging from 0.5 to 5 seconds at 125% rated current and 0.07 to 0.7 seconds at 200% rated current, providing precise protection tailored to specific application requirements. The auxiliary switch is rated at 3.0 amperes at 120 VAC or 50 VDC, with an approximate weight of 1.8 ounces per pole. This protector is ideal for automation systems, sensitive circuitry, and applications requiring voltage or current-based trip actuation with remote indication capabilities.