The R21-61-15.0A-B01IV-V is a single-pole SNAPAK® series hydraulic-magnetic circuit protector featuring a paddle handle actuator and 15.0A rated current capacity. This snap-acting device combines the functions of a power switch, fuse, and fuse holder in one compact package, reducing assembly requirements and inventory needs. The unit is designed for both DC and 50/60 Hz AC operation, with toggle actuation providing 15° ON/OFF positions and reliable circuit protection through accurate magnetic and hydraulic mechanisms. The paddle handle is available in multiple colors (blue, white, red, green, yellow, or black) for easy identification and safe operation. This circuit protector is suitable for aerospace, industrial control, and power distribution applications where reliable overcurrent protection and manual switching are required.