Cooper Bussmann ATC-4 Fast Acting Automotive Fuse 4A

Product Description

The COOPER BUSSMANN ATC-4 is a fast-acting automotive blade fuse rated at 4 amps and 32 volts DC. It is designed for overcurrent protection in automotive electrical systems and low-voltage control circuits where rapid fault interruption is required. The housing is constructed from polycarbonate, and the terminal and element are zinc with a tin-plated finish. At 0.75 inches in overall length, the ATC-4 fits standard ATC blade fuse holders commonly found throughout light-duty vehicle wiring harnesses, accessory circuits, and auxiliary control panels. Installation is straightforward for automotive electricians and 12-volt system technicians.

The ATC-4 is suited for use in passenger vehicles, light trucks, marine accessory circuits, and low-voltage control applications where a compact blade fuse is specified. Its fast-acting response makes it appropriate for circuits requiring tight overcurrent protection rather than delayed response. This fuse is also a direct replacement for comparable fuses in the Littelfuse ATO004 and Ferraz Shawmut AF-4 series, as noted in supplier documentation. It is sold individually but carries a minimum order quantity of 5 units.

Key Features

• Fast-acting blade fuse for rapid fault interruption in automotive and low-voltage circuits
• 4 amp rating at 32 volts DC
• Polycarbonate housing with zinc terminal and element, tin-plated finish
• 0.75 inches overall length fits standard ATC blade fuse holders
• Meets ISO 8820-3, SAE J1284, JASO 612, and SAE J1171 ignition protection standards
• UL Recognized under File E56412, Guide JFHR2, and UL 248-1; RoHS compliant

Compatibility

Designed as an OEM-style replacement for ATC series blade fuse applications. Listed as a replacement for Littelfuse ATO004 and Ferraz Shawmut AF-4 per supplier data. Fits standard ATC blade fuse holders rated for the 1 to 40 amp series.

Installation Notes

Installation is performed by licensed automotive electricians or qualified 12-volt system technicians. Disconnect the vehicle battery or de-energize the circuit before replacing any fuse. Confirm the replacement fuse amperage matches the circuit protection requirement before installation. Never substitute a higher-amperage fuse to address a repeated blowing condition without first diagnosing the root cause.