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851

Presentation

• Sealed and hermetic types• Wide choice of body styles and back fittings • Olive green, black anodised or nickel plated • Solder, crimp, straight spill and wire-wrap versions • Thermocouple crimp contacts available • The 851 version with solder contacts is on US QPL • 851 connectors are also widely available from distributors.Souriau 851 circular connectors were originally conceived to ensure reliable electrical connections in aircraft but their lightweight compact size and general characteristics have contributed to successful adoption in numerous civil and military aviation applications and also in the fields of professional and general electronics (machine tools, automation, measuring equipment…).851 connectors conform to the following international standards, MIL-C-26482G series 1, NFC 93422, HE 301B, VG 95328, GAM/T1 list.851 connectors feature a positive bayonet coupling mechanism which ensures reliable mechanical and elec-trical connection between mating halves. A helical locking ring on the plug couples with three dowel pegs on the receptacle ensuring rapid locking. Orientation and location is ensured by a system of five raised keys on the plugs which couple with corresponding slots on the receptacles. Connectors with different angular positioning of the insulator relative to the shell can be provided to prevent mating of adjacent connectors with the same contact arrangements.The connector shells are manufactured from aluminium alloy. The insulators are moulded from elastomer and are bonded into the shells. Grommets are also made from elastomer and are supplied with appropriate accessories in the solder version, but are integral with the insulator for the crimp version. Copper alloy contacts have gold over nickel plating.Hermetic receptacles with gold plated solder contacts are made from steel shells with nickel plating (01H) or yellow cadmium plating (02H and 07H). The contacts are permanently fused into a glass insulator providing a high level of sealing. 4