BK2-S-4201-1X-R is a single-pole fuse block designed for 1/4" x 1-1/4" fuses with a voltage rating of 250 Vac and current rating of 25 A. The block features a PA66-GF25 body material (UL 94V-0 rated, black) with copper alloy tin-plated clips, brass tin-plated terminals, and aluminum alloy rivets, providing robust electrical and mechanical performance. It is equipped with 1/4" quick-connect terminals and includes no anti-rotational pin configuration. The device is certified by cURus and CE agencies, making it suitable for industrial and commercial electrical distribution applications where reliable fuse protection and quick-connect convenience are required.