Blue Sea Systems 9004e e-Series On-Off Battery Switch With Alternator Field Disconnect

350 Ampere continuous rating for inboard gasoline and diesel engines. One-piece tin-plated copper stud design never loosens over time. Terminal studs accept 3/8" or M10 ring terminals. Ignition protected and UL Listed. Selector features make-before-break contact design. Color: Red. AFD = Alternator Field Disconnect models; Allow switching while running the engine without damaging the alternator.