A Series™ Connectors Amphenol Sine Systems A Series™ Family of sealed heavy-duty, multi-pin plastic and metal connectors feature a wide range of products designed to serve many industries. The connectors are developed as a high-performance, cost-effective solution for use with heavy equipment, agricultural, automotive, military, alternative energy, and other demanding interconnect architectures. The A Series Family bridges the gap between controlled and harsh environmental conditions to keep designers connected. IP ratings vary depending on the series.