Cooper Bussmann FWH-50B Cartridge Fast-acting Fuse 50A

Product Description

The COOPER BUSSMANN FWH-50B is a cartridge-style, fast-acting fuse rated at 50 amps with an overall length of 3-3/16 inches. It is designed for bolt-on mounting in industrial power distribution, drive protection, and semiconductor equipment applications. The fast-acting response characteristic makes this fuse well suited for protecting sensitive electronics and solid-state components where rapid overcurrent interruption is critical. Interrupting ratings reach 200 kA RMS symmetrical and 50 kA at DC, providing robust fault-clearing capability. Licensed electricians and industrial maintenance technicians are the primary installers of this fuse type.

This fuse is commonly used in variable frequency drives (VFDs), power conversion equipment, and industrial control panels where high-speed overcurrent protection is required. The bolt-on mount style allows secure installation in standard fuse blocks and fusible disconnect assemblies. It is appropriate for both new installations and replacement service in commercial and industrial electrical systems requiring fast-acting protection at the 50-amp rating level.

Key Features

• Fast-acting fuse timing provides rapid overcurrent interruption for sensitive solid-state and semiconductor equipment
• 50-amp current rating suits a wide range of drive and power distribution applications
• 200 kA RMS symmetrical interrupting rating for high-fault-current environments
• 50 kA DC interrupting rating for DC bus protection applications
• Bolt-on mount design for secure, vibration-resistant installation
• CE Certified, CSA 1422-30 File 53787 Component Accepted, and UL Recognized Guide JFHR2 File E91958

Compatibility

Designed as an OEM-style replacement fast-acting cartridge fuse for industrial fuse blocks and fusible disconnects requiring a bolt-on mount, 50-amp, fast-acting fuse at 3-3/16 inches overall length.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize and lock out the circuit before removing or installing the fuse. Verify that the fuse block or holder is rated for the voltage and interrupting capacity of this fuse before installation. Do not substitute a slow-blow or time-delay fuse in an application that specifies fast-acting protection.