Cooper Bussmann KTK-R-4/10 Cc Fast-acting Fuse 0.4A 600V

Product Description

The COOPER BUSSMANN KTK-R-4/10 is a cartridge-style, fast-acting fuse rated at 0.4 amps and 600 volts AC. It belongs to the Class CC fuse category, which uses a rejection feature to prevent misapplication with non-CC fuse holders. The fuse measures 1.5 inches in overall length and 10.3 mm in diameter, fitting standard CC-class fuse holders. With a 200 kA interrupting rating at AC (RMS), it provides high-level short-circuit protection in demanding branch-circuit and control-circuit applications. Licensed electricians and industrial maintenance technicians are the primary installers.

This fuse is suited for residential, commercial, and light industrial control panels where precise overcurrent protection is required at low amperage levels. Its fast-acting response makes it appropriate for protecting sensitive electronic components, motor control circuits, and instrumentation equipment. The Class CC form factor is commonly found in terminal-block fuse holders and compact fusible disconnect blocks used in control wiring applications.

Key Features

• Class CC rejection design prevents substitution with lower-rated or non-CC fuses
• Fast-acting response for protection of sensitive electronic and control circuits
• 200 kA interrupting rating at AC (RMS) for high fault-current environments
• 600-volt rating supports use in standard branch-circuit and control-circuit applications
• UL Listed, CSA Certified, CE Certified, and RoHS Compliant
• Compact cartridge body fits standard CC-class fuse holders

Compatibility

Designed for use in Class CC fuse holders with rejection-type mounting. The rejection feature prevents installation in non-CC holders, ensuring correct application in control and branch-circuit panels.

Installation Notes

Installation should be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and applicable local codes. Always de-energize and lock out the circuit before replacing fuses. Use an insulated fuse puller appropriate for the fuse holder type. Do not install in non-CC or non-rejecting fuse holders, as the physical rejection feature is a design safety requirement.