MHV connector

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The MHV (miniature high voltage) connector is a type of RF connector used for terminating coaxial cable. The connector looks almost identical to a typical BNC connector, but is not designed to mate with BNC jacks. MHV connectors can be recognized by the slightly protruding insulation on the male plug and the slightly different insulation length in the female jack. Despite these design differences, MHV and BNC plugs and jacks can be made to mate by brute force. This causes safety hazards, since a user can accidentally (or deliberately) mate a low voltage cable to a high voltage jack.

The MHV connector is rated for 5000 volts DC and 3 amperes. It was commonly used in laboratory settings for voltages beyond the rating of BNC connectors.

MHV connectors are presently considered a safety hazard because of the possibility of high voltage on the exposed central pin when not plugged in^[1], and because the ground connection is broken before the power connection when demating. SHV connectors are designed to prevent these hazards, and cannot be mated to to BNC connectors.

[edit] References

1. ^ ALS Beamline Electrical Safety Guidelines.

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