Bussmann CB221 Series, Type I, ATC Blade Style Automotive Circuit Breakers match the ATC fuse footprint. Ultra-thin design fits in tight spaces - theyre the smallest automotive circuit breakers on the market. 20 Amp, 12 Vdc. Automatic Reset - resets automatically but will continue to trip (cycle on and off) until fault is corrected. Meets SAE J553 standards. Sold individually. Its been 100 years since the Bussmann brothers first started producing fuses from the basement of their home. And in that time span, Bussmann has grown from providing fuses for horseless carriages and World War II aircraft, to offering more than 30,000 products. From humble beginnings in St. Louis, Missouri, to a global product and distribution network, the Bussmann name is synonymous with technological innovation. In fact, over the past 100 years, Bussmann products have received more than 3,000 utility and design patents, with more than 350 global active patents. Today, Bussmann products continue to reflect a lo