 Two coupled MHV elbows showing both plug and jack ends. | |||
| Type | RF coaxial connector | ||
|---|---|---|---|
| Production history | |||
| Manufacturer | Various | ||
| General specifications | |||
| Diameter | Male: 0.385 in (0.98 cm) (inner, bayonet)[1] Female: 0.378 in (0.96 cm) (outer, typical)[1] | ||
| Cable | Coaxial | ||
| Passband | Typically 0–300 MHZ | ||
| Electrical | |||
| Max. voltage | 5000Vpk | ||
| Max. current | 3A | ||
TheMHV (miniature high voltage) connector is a type ofRF connector used for terminatingcoaxial cable.[2][3][4]
The connector looks almost identical to a typicalBNC connector, but is designed to not mate with BNC jacks. It features two bayonet lugs on the female connector; mating is fully achieved with a quarter turn of the coupling nut. The dimensions of the connector are specified in theMIL-STD-348B. MHV connectors can be recognized by the slightly protruding insulation on the male plug and the slightly different insulation length in the female jack.
The MHV connector is typically rated for 1500 VRMS continuous and 5000 V peak, and 3amperes. With an operating frequency limited to about 300 MHz their usage is restricted to low frequency applications.[2][3][4][1] It was commonly used in laboratory settings for voltages beyond the rating of BNC connectors. Other applications include:
MHV connectors are asafety hazard because the central pin is close enough to the end to allow accidental contact with it when the connector is not plugged in,[5][6][3] and because the ground connection is broken before the power connection when demating.[4]
An additional problem is that MHV connectors are easily mistaken for BNC connectors by users who are unaware of the difference, and MHV and BNC plugs and jacks can be made to mate by brute force.[3] This causes safety hazards, since a user can mate a low voltage cable to a high voltage jack.
SHV connectors are designed to prevent these hazards, and cannot be mated to BNC connectors.[3]