The R21-4-15.0A-B161CV-V is a single-pole SNAPAK® series hydraulic-magnetic circuit protector featuring a paddle handle actuator with rocker-style operation. This device combines power switching, fuse functionality, and fuse holder into a single integrated package, rated for 15.0A continuous current with fast DC delay characteristics. The unit is designed for panel mounting with a standard snap-in configuration and operates across multiple voltage ratings including 32V DC, 36V DC, 45V DC, 65V DC, and 125V AC at 50/60 Hz, with UL and CSA construction certification. The paddle handle is available in six color options (blue, white, red, green, yellow, or black) and features a 15° toggle angle for reliable, ergonomic operation. This circuit protector is ideal for aerospace, industrial control, and power distribution applications where compact, reliable overcurrent protection and manual switching are required.