Cooper Bussmann ATC-40 Fast Acting Automotive Fuse 40A

Product Description

The COOPER BUSSMANN ATC-40 is a fast-acting automotive blade fuse rated at 40 amps and 32 volts DC. It is designed to protect wiring and low-voltage control circuits in automotive and vehicle-based electrical systems. The ATC-40 features a polycarbonate housing with zinc terminals and element, finished in tin plating for reliable contact. At 0.75 inches in overall length, it fits standard ATC-style fuse holders found throughout the automotive and light-equipment industries. Licensed electricians and automotive technicians install this fuse as a direct replacement in any application requiring a 40-amp fast-acting blade fuse.

This fuse is suited for automotive electrical systems and low-voltage control circuits operating at up to 32 volts DC. Typical applications include vehicle wiring harnesses, auxiliary equipment circuits, ignition-protected systems, and other low-voltage control panel installations. The fast-acting response characteristic makes it appropriate for circuits requiring immediate overcurrent interruption to protect sensitive components and wiring. It is sold in multiples of 5 per order with a package quantity of 1 per unit.

Key Features

• Fast-acting overcurrent protection rated at 40 amps and 32 volts DC
• Standard ATC blade fuse form factor at 0.75 inches in length
• Polycarbonate housing with tin-plated zinc terminal and element for corrosion resistance
• Meets ISO 8820-3, SAE J1284, JASO 612, and SAE J1171 ignition protection standards
• UL Recognized under File E56412, Guide JFHR2, UL 248-1
• RoHS compliant construction

Compatibility

The ATC-40 is a direct replacement for Littlefuse ATO040 and Ferraz Shawmut AF-40. It is designed for use in standard ATC-series blade fuse holders in automotive and low-voltage control circuit applications.

Installation Notes

Installation of automotive blade fuses should be performed by a qualified automotive technician or electrician. Disconnect or isolate the circuit before removing or inserting any fuse to prevent arcing or unintended current flow. Verify that the replacement fuse amperage matches the circuit protection requirement exactly — never substitute a higher-rated fuse to resolve a blown-fuse condition without diagnosing the underlying fault. For ignition-protected applications, confirm compliance with SAE J1171 requirements before installation.