Cooper Bussmann FWH-35B Cartridge Fast-acting Fuse 35A

Product Description

The COOPER BUSSMANN FWH-35B is a cartridge-style fast-acting fuse rated at 35 amps with an overall length of 3-3/16 inches. It is designed for bolt-on panel and bus mounting in industrial power distribution, motor control, and semiconductor protection circuits. The fast-acting response characteristic makes it suitable for protecting sensitive components that cannot tolerate the time delay of a slow-blow fuse. With an interrupting rating of 50 kiloamps at DC and 200 amps RMS symmetrical AC, the FWH-35B handles high fault-current environments common in industrial control panels, drives, and power conversion equipment. Electricians and industrial maintenance technicians are the primary installers of this fuse.

The FWH-35B is used in industrial and commercial electrical systems where fast overcurrent protection is required. Typical applications include variable frequency drives, rectifiers, power supplies, and other semiconductor-based equipment where a standard fuse would respond too slowly to prevent component damage. The bolt-on mount configuration fits standard fuse blocks and bus bars designed for this body style. The cartridge form factor keeps the installation compact within panel enclosures.

Key Features

• Fast-acting fuse response for semiconductor and sensitive component protection
• 35-amp continuous current rating
• 50 kA interrupting rating at DC for high fault-current applications
• 200 amps RMS symmetrical AC interrupting capacity
• Bolt-on mount for secure, low-resistance bus bar or fuse block installation
• CE Certified, CSA 1422-30 Component Accepted, and UL Recognized (Guide JFHR2)

Compatibility

Designed for use in bolt-on fuse blocks and bus bar assemblies that accept cartridge-style fast-acting fuses with a 3-3/16-inch overall length body. Verify fuse block specifications and voltage ratings before installation.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the NEC and any applicable local codes. De-energize and lockout/tagout the circuit completely before removing or installing this fuse. Confirm that the replacement fuse amperage and interrupting ratings meet or exceed the requirements of the protected circuit. Do not use a fuse with a higher amperage rating than the circuit is designed to carry.