Littelfuse, Inc. Consists of a N version according to ISO 1185, and an S version according to ISO 3731 00591200

The system consists of a N (Normal) version according to ISO 1185, generally used for standard applications, and a S (Supplementary) version according to ISO 3731 used for additional connections. The S version can be distinguished by its white coloring and by the different order of the contacts, preventing an incorrect connection to the N version. Littelfuse supplies these connectors both with plastic or aluminum body and some versions feature a black anti-oxidating coating. Standards: Conforms to ISO 1185 & ISO 3731 recommendations and standards Accepts all 7-pole sockets that conform to ISO 1185 & ISO 3731