Bussmann CH221B Modular 22x58mm 1-Pole Fuse Holder

The Bussmann (Eaton) CH221B modular fuse holder is a one-pole, 22×58 mm DIN-rail–mountable holder designed for use with 22×58 mm cartridge fuses, delivering compact protection in control panels and power-distribution enclosures. It is rated for up to 600 VAC or 600 VDC and supports a maximum current of 100 A, making it suitable for high-current protection in industrial equipment. The unit accepts conductors in the range of 2.5–50 mm2 (14–1 AWG) and uses a robust connection designed for reliable fault isolation, with a torque specification of 4.0 N·m (35 in-lb) for secure terminations. The CH221B variant is listed without local indication, aligning with typical modular Bussmann configurations for DIN-rail installations. A typical specification set also lists a power-dissipation rating in the 9.5 W range, reflecting the energy load associated with holding and maintaining a fuse in the circuit under normal operation. This fuse holder is part of Bussmann’s 22×58 mm modular family, intended for use with 22×58 mm IEC fuses in industrial control panels and similar applications where straightforward, one-fuse protection is required.