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Feedthroughs & Viewports > Electrical Feedthroughs > Coaxial Feedthroughs > SHV-20 Series Feedthroughs

SHV-20 Feedthroughs Cabling Instructions & Specifications


  • Designed and rated for use in high and ultrahigh vacuum applications
  • Constructed of vacuum-grade materials, including 304 stainless steel conductor pins and mounts, high-purity alumina ceramic insulation, and vacuum-tube-grade braze alloys
  • Recessed female contacts in cable connectors reduce the possibility of electrical shock while preventing crossmating with BNC- or MHVstyle components
  • These coaxial assemblies have one air-side cable connector, but no vacuum-side power push-on connectors

Specifications Table

Conductor MaterialNickel
Insulator MaterialAlumina
Vacuum ApplicationHV or UHV
Temperature Range
(for metal seals)
Weld adapter, CF: -200° C to +450° C
Temperature Range
(for elastomer seals)
KF, O-Ring, NPT: To +150° C
Temperature Max. Ramp Rate25° C/Minute
Temperature Range
(cable connectors)
-65° C to +165° C
Max. Voltage
(for grounded shields)
20kV DC
Max. Current15A

SHV-20 Coaxial Cabling Instructions


1) Slide grip sleeve over cable jacket. Cut and strip cable jacket, braided shield and dielectric, as illustrated. Be careful not to nick the conductor.


2) Wet exposed conductor using a non-acid core 60/40 tin/lead solder. Then, slide contact on conductor and solder in place. Do not overheat cable dielectric. Flare out cable braid, being careful not to fray.


3) Slide cable assembly into shell, being careful not to pinch or otherwise damage cable seal. Guide contact shoulder so that it butts against shell insulator.


4) Slide grip sleeve forward over braid until it butts up against shell. Crimp in place as illustrated. Use correct crimping tool with respective crimping die number. Braid should not extend beyond grip sleeve. Finally, slide interface seal into shell until it bottoms out evenly around contact.