The R11-4-4.00A-R01CV-V is a single-pole hydraulic-magnetic circuit protector from the SNAPAK® series, combining power switching, fuse, and fuse holder functions in one compact unit. This rocker-actuated device is rated for 4.00A continuous current and features a snap-in mounting design with paddle handle actuation. The unit operates across multiple voltage and frequency configurations including DC, 50/60 Hz, and 400 Hz applications, with contact ratings up to 10:30 (UL/CSA) depending on voltage selection. It provides reliable circuit protection with accurate trip characteristics and is designed for panel-mount installation with standard 0.125" panel thickness. Common applications include power distribution, motor control, and load switching in industrial equipment, aerospace systems, and consumer appliances where compact, integrated protection is required.