This European Standard defines the characteristics of square flange receptacles of the family of bayonet coupling circular connectors, intended for use in an operating temperature range of – 65 °C to 175 °C or 200 °C continuous.

It applies to models defined in Table 3.

For contact, filler plugs and rear accessories associated with this receptacle see EN 3646-002. For plugs and protective covers, see EN 3646-008 and EN 3646-009 respectively.