What Is a Waterproof Connector? A waterproof connector is an electrical connector designed with sealing elements (gaskets, O-rings, potting compound) to prevent water or moisture ingress. The level of protection is defined by the IEC 60529 IP (Ingress Protection) rating system. Understanding IP Ratings for Connectors IP RatingWater ProtectionTypical Application IP65Protected against low-pressure water jets from any directionOutdoor lighting, industrial enclosures IP67Immersion up to 1 meter for 30 minutesAutomotive, outdoor electronics, agriculture IP68Continuous immersion beyond 1 meter (manufacturer specified)Marine, underwater equipment, diving instruments Common Waterproof Connector Types M12 Circular Connector M12 connectors are the industrial standard for sensor and actuator connections (A-coded for sensors, B-coded for Profibus, D-coded for Ethernet). Rated IP67/IP68 when mated. Available in 3, 4, 5, 8, and 12 pin configurations. 7/8 Inch (M23) Power Connector The 7/8 inch connector (also called M23) handles higher current loads (up to 16A) and is widely used in industrial automation, motor drives, and power distribution. IP68 rated when mated. Panel-Mount Waterproof Connectors Designed to mount through enclosure walls, these connectors seal both the connector mating interface and the panel cutout. Common in marine electronics, outdoor power systems, and agricultural equipment. Micro Waterproof Connectors (1.0mm–2.0mm pitch) For compact electronics requiring IP67, micro waterproof connectors with wire seal + face seal design are used in wearables, automotive sensors, and handheld devices. Key Selection Criteria Required IP rating: Match the environment — IP67 for most outdoor applications, IP68 for submersion Pin count and current rating: Ensure adequate current capacity per pin Mating cycles: Industrial connectors typically rated 500–1000 cycles Material: Nylon housing for general use; stainless steel or zinc alloy for harsh environments Operating temperature: Standard -25°C to +85°C; extended range available Hong YiAn Waterproof Connector Solutions Hong YiAn manufactures and supplies IP65, IP67, and IP68 rated connectors for industrial, automotive, marine, and outdoor applications. Custom configurations available with MOQ from 500 pcs. All products tested to IEC 60529 standards. Browse Waterproof & Circular Connectors | Get a Quote