EM-W Connectors Hirose EM-W Connectors are rugged 4-position high current connectors with a bayonet locking system to maintain a waterproof seal in harsh environments. Developed for high power applications, the EM-W Connectors offer 50A per contact, a quick-and-secure bayonet lock, sequential ground contact, and easy termination with a standard JIS crimp tool. The RoHS compliant and TÜV certified EM-W Series is designed to accommodate 8mm2 cable conductor sizes. When mated, these connectors provide an IP68 water-resistant seal.