BK/GMC-63-R is a medium time delay, low breaking capacity fuse designed for circuit protection in AC applications. It features a 5mm x 20mm glass tube construction with nickel-plated brass endcaps, rated for 63mA at 250V AC with an AC interrupting rating of 35A. The fuse exhibits medium time delay characteristics: it carries 100% of rated current indefinitely, withstands 135% of rated current for up to 60 minutes, and opens within 2 minutes at 200% of rated current. With a typical DC cold resistance of 10,000O and a maximum voltage drop of 0.0027mV at rated current, this RoHS-compliant fuse is UL listed (Guide JDYX, File E19180) and CSA certified (Class 1422-01, File E65063). The BK/GMC-63-R is ideal for protecting sensitive electronic circuits, instrumentation, and low-current applications where controlled time delay protection is required.