Can a BNC connector be used on an MHV feedthrough?
No. Caution should be exercised in electrical systems fitted with both BNC and MHV connections. BNC and MHV connections are almost identical in appearance and geometry and should never be cross-mated since their electrical ratings are not compatible. BNC connections are rated to 500VDC while MHV connections can handle voltages as high as 5000VDC.