CH221DN

Fuseholders

The CH221DN is a fused, drop-in installation, panel-mount pair of terminal blocks with positive-opening function and independence unit structure. The CH221DN are widely used in inverters, switch boards, controllers and various types of power supplies and other dedicated industry protection equipment.

Application Field

The CH221DN is specially designed for mounting DIN rail terminal blocks which secures good contact alignment and arrangement within limited space. For unmatched convenience and safety they employ positive-opening function and provide signal or power connections in electrical equipment. The CH221DN is often used in industrial control, electrical energy production and metering, telecom, power supply, rail and many other application areas.

The CH221DN is especially popular among the customers of the medical, shipbuilding, military and instrumentation markets. They are also used in various types of vehicles for their strong connection electromagnetic capability ensuring maximum reliability and safety in an extremely compact design.

Working Principle

The CH221DN operates on the principle of drop-in installation. It is designed to be easily installed on the steel backplane of an enclosure on a DIN rail. The connection of conductors is made by screw-clamping two terminals with a pre-wired, positive-opening fuse holder. This ensures the use of correct screw torque during installation. Moreover, a positive-opening fuse holder provides safety by preventing the accidental de-energization of operational circuits because of human error or mechanical failure.

The CH221DN also provides signal or power connections in electrical equipment, as the power is routed through the terminal blocks. This ensures that the power is accurately distributed to the designated locations throughout the system and is not lost due to interference along the way.

The CH221DN is also equipped with a labeling solution, enabling users to easily identify the terminal blocks and the connections within the equipment. The terminal block features a self-adhesive insulating film to ensure the protection of the components against electric shock and mechanical vibration.