Please select your country or region to be
directed to the appropriate Lesker site.

Representative Image

BNC Feedthroughs - Weldable, Double-Ended

These instrumentation feedthroughs have BNC coaxial connectors on the air-side and vacuum-side. Connector-plug combinations are offered with unmatched 48-52 ohms impedance or matched 50 ohms impedance. Air-side plugs are included with the feedthrough but vacuum-side plugs are not. These feedthroughs are designed to be welded into a suitable through-hole in a flange.

Specifications Table

Cable RG-58/U, 400/U, 142/U, 141/U
Vacuum Application UHV
Temperature Max. Ramp Rate 25°C/minute
Cable Connectors Temperature Range -65°C to 165°C
Floating Shields Max. Voltage
2,500V DC
Floating Shields Max. Voltage
500V DC
Grounded Shields Max. Voltage 500V DC

Cabling Instructions
Follow the link below to view the BNC Feedthrough cabling diagrams & instructions.
Contact Us
Contact Us
To contact someone directly, please click here, or call +1 800 245 1656 to get in contact with your dedicated sales team.
  • The electrical and thermal ratings specified are of safe operating limits determined by various factors including material properties, mechanical design, and the intended operating environment. All electrical ratings are based on operation with one side in dry atmosphere and the other side in vacuum of less than 1 x 10-4 Torr. All VacuCAD files as well as any dimensions shown or listed in our ordering tables do not include manufacturing tolerances and are provided for reference only.

Ordering Table

(Click column headers to sort data)

Got VacuCADSM?
VacuCAD is a free library containing thousands of 2D CAD drawings (in DXF format) and 3D Models (in STP format) for many of our standard vacuum components and chambers. Please Log in
Feedthrough Selection Guide
Feedthrough Selection Guide
Finding the right feedthrough has never been easier with our step by step Feedthrough Selection Guide. You can narrow down our feedthrough offering by simply choosing from a variety of different options suitable to your requirements. If you can't find the feedthrough you need or want a custom configuration, please contact us by clicking here or call +1 800 245 1656 with your inquiry.
Contact Us - BNC Feedthroughs - Weldable, Double-Ended