Cooper Bussmann NON-4 Cartridge Fast-acting Fuse K5 4A

Product Description

The COOPER BUSSMANN NON-4 is a Class K5 cartridge-style fast-acting fuse rated at 4 amps for use in general-purpose electrical protection applications. Measuring 2 inches in overall length and 14.3 mm in diameter, this fuse is designed to open rapidly on overcurrent events, limiting damage to downstream equipment and wiring. It is suitable for installation in standard fuse holders and panels where K5-class protection is required. Licensed electricians and qualified electrical contractors typically install this fuse class in commercial and industrial distribution systems.

The NON-4 is a general-purpose fuse intended for use in standard fuse-holder mounts across a range of electrical distribution and control panel applications. It carries CE, CSA, and UL listings, making it suitable for installations subject to North American and international electrical standards. This fuse is appropriate for residential, commercial, and light industrial circuits where fast-acting overcurrent protection at 4 amps is specified.

Key Features

• Class K5 fast-acting cartridge fuse rated at 4 amps
• Overall length of 2 inches (50.8 mm) with 14.3 mm body diameter
• 50 kA interrupting rating at AC and DC voltage
• Mounts in standard cartridge fuse holders
• CE Certified, CSA Certified (Class 1421-01 File 53787), and UL Listed (UL 248-9, UL Guide JDDZ File E4274)

Compatibility

Designed as an OEM-style replacement for Class K5 general-purpose cartridge fuse applications using standard fuse holders sized for 2-inch cartridge fuses.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. Always de-energize and lock out the circuit before replacing a fuse. Verify the replacement fuse class, amperage rating, and physical dimensions match the original fuse and holder specifications before installing. Do not install this fuse in a holder designed for a different cartridge size or class.