Cooper Bussmann SFE-4 Fast Acting Automotive Fuse 4A

Product Description

The COOPER BUSSMANN SFE-4 is a fast-acting automotive fuse rated at 4 amps and 32 VAC/VDC. Built to SFE series dimensions with a glass tube body measuring 0.25 inches in diameter and 0.625 inches in length, this fuse provides reliable overcurrent protection in low-voltage automotive and equipment circuits. It is designed for quick response to fault conditions, opening rapidly to protect wiring and components from damage. Licensed electricians, automotive technicians, and equipment service pros install this type of fuse in a wide range of 12-volt and 24-volt system applications.

The SFE-4 is suited for use in automotive circuits where SFE-style fuse holders are present. Typical applications include instrument panel circuits, accessory wiring, and auxiliary equipment feeds operating at or below 32 volts. The glass body allows visual inspection of the element, making it straightforward to confirm a blown fuse during diagnostic work. Compatible replacement references include Littelfuse 307004 and Ferraz Shawmut FSFE4.

Key Features

• Fast-acting element opens quickly under overload or short-circuit conditions
• Glass tube body allows visual confirmation of fuse status without removal
• Rated 4 amps at 32 VAC/VDC for low-voltage automotive circuit protection
• SFE series form factor fits standard SFE-style inline and panel fuse holders
• UL Listed under Guide FHXT, File AU169
• Meets SAE standards for automotive fuse applications

Compatibility

The SFE-4 is a direct replacement for Littelfuse 307004 and Ferraz Shawmut FSFE4. It fits standard SFE-series fuse holders rated for fast-acting automotive fuses at 32 volts or below.

Installation Notes

Automotive technicians and electricians should disconnect the power source or remove the battery connection before replacing any inline fuse. Confirm the replacement fuse amperage matches the circuit rating exactly — substituting a higher-amp fuse defeats the overcurrent protection and can damage wiring or components. Use appropriately rated SFE-style fuse holders and inspect holder contacts for corrosion or heat damage during service.