ATHD Single-Pole Heavy Duty Power Connectors Amphenol Sine Systems ATHD Series™ Single-Pole, Heavy Duty Power Connectors feature an IP67/69K rated (mated) and environmentally sealed connection system. The ATHD series offers a viable solution to field splices and terminals in harsh environments. Safety features include an integral latch to prevent inadvertent disconnect and an audible click with a tactile feel to provide circuit confirmation. Precision-machined contact technology maximizes performance and durability while delivering up to 100A of power. The rugged circular housings can be used as an in-line, BoardLock™ ATFHD or easy-to-install sealed flange-mount connection system for heavy-duty applications. Amphenol ATHD Series Heavy Duty Power Connectors are ideal for transportation, diagnostics, military, and alternative energy applications.