The connector uses a bayonet mount similar to those of the BNC and MHV connectors, but is easily distinguished due to its very thick and protruding insulator.

[1] This insulation geometry makes SHV connectors safer for handling high voltage than MHV connectors,[2] by preventing accidental contact with the live conductor in an unmated connector or plug.

The connector is also designed such that when it is being disconnected from a plug, the high-voltage contact is broken before the ground contact, to prevent accidental shocks.

[1] Details of the connector comprising dimensions of the mating parts, voltage rating, minimum insulation requirements and more are specified by the IEC document 60498.

Standard SHV connectors are rated for 5000 volts DC and 5 amperes,[1][2] although higher-voltage versions (to 20 kV) are also available.