Cooper Bussmann KTK-R-4 Class Cc Fast-acting Fuse 4A 600V

Product Description

The COOPER BUSSMANN KTK-R-4 is a Class CC cartridge fast-acting fuse rated at 4 amps and 600 volts AC, with an interrupting rating of 200 kA at AC RMS. Designed for general-purpose overcurrent protection, this fuse provides rapid response to fault conditions, making it well-suited for control circuits, motor control centers, and industrial distribution panels. Electricians and controls technicians install this fuse in fuse holders that accept Class CC rejection-style bodies. Its compact cartridge form measures 1.5 inches in length and 10.3 mm in diameter.

The KTK-R-4 is used in residential and commercial electrical systems where Class CC fuse holders are specified. Typical applications include branch circuit protection for control transformers, instrumentation panels, and low-amperage feeder circuits. The rejection feature prevents the installation of non-Class CC fuses in Class CC holders, enforcing correct overcurrent protection by design. Licensed electricians and industrial maintenance technicians are the primary installers of this fuse type.

Key Features

• Fast-acting fuse response for rapid fault clearing on sensitive control circuits
• Class CC rejection body prevents cross-installation of incompatible fuse types
• 200 kA AC RMS interrupting rating for high-fault-current environments
• 600-volt rating supports a wide range of single-phase and three-phase control applications
• UL Listed 248-4 Class CC, CSA Certified, CE Certified, and RoHS Compliant
• Compact cartridge form fits standard Class CC fuse holders

Compatibility

Designed for use in Class CC fuse holders that accept rejection-style cartridge fuses. Specific holder compatibility should be verified against the fuse holder manufacturer specifications prior to installation.

Installation Notes

Installation should be performed by a licensed electrician in accordance with applicable NEC requirements. De-energize and lock out the circuit before removing or installing any fuse. Use an insulated fuse puller rated for the application voltage when servicing fuses in live-adjacent panels. Verify the replacement fuse amperage and class marking match the original fuse and the circuit overcurrent protection requirements before closing the circuit.