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Feedthroughs & Viewports > Electrical Feedthroughs > Ceramic Break Feedthroughs

Weldable Vacuum Ceramic Breaks

Features

  • Designed and rated for high and ultra-high vacuum applications
  • Constructed of vacuum-grade materials, including high-purity alumina ceramic insulation, 304 stainless steel or low-expansion Kovar weldable lips, and vacuum tube-grade braze alloys
  • Available in tube sizes ranging from 1/2" to 8" nominal diameters
  • Larger-diameter assemblies have tapered seals to minimize stress caused by differential expansion during thermal cycling
  • Non-magnetic ceramic breaks are available; however, our standard ceramic breaks do contain minimal magnetic materials.

Dimensional Drawings

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

Ordering Table


Voltage
(V)
Conductor
Material
Dim
A
Dim
B
Dim
C
Dim
D
PartNo Price Add
Item
VacuCADSM
Voltage
(V)
Conductor
Material
Dim
A
Dim
B
Dim
C
Dim
D
PartNo Price Add
Item
VacuCADSM
5kV Stainless Steel 2.2 1.66 0.25 1.5
CFT03V1501
$170.00
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5kV Kovar 1.90 1.70 0.16 1.250
CFT05V1251
$309.00
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8kV Kovar 3.63 3.23 0.75 2.370
CFT08V2371
$792.00
(please log in)
8kV Kovar 3.57 4.25 0.75 3.810
CFT08V3811
$957.00
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10kV Stainless Steel 1.55 0.65 0.75 0.508
CFT10V0511
$392.00
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10kV Stainless Steel 2.62 1.04 1.00 0.750
CFT10V0751
$206.00
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15kV Stainless Steel 3.80 1.66 2.00 1.500
CFT15V1501
$193.00
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15kV Kovar 4.64 8.80 1.50 7.830
CFT15V7831
$2,486.00
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20kV Kovar 2.58 1.40 1.50 1.200
CFT20V1201
$442.00
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20kV Kovar 3.70 4.90 0.90 4.000
CFT20V4001
$1,221.00
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20kV Kovar 4.5 6.92 1.5 6.08
CFT20V6081
$1,849.00
N/A
35kV Stainless Steel 3.80 1.70 2.00 1.250
CFT35V1251
P.O.R.
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40kV Kovar 3.40 2.50 2.00 2.375
CFT40V2381
$691.00
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60kV Kovar 4.40 3.00 3.00 2.800
CFT60V2801
$598.00
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60kV Kovar 6.50 4.90 3.65 4.000
CFT60V4001
P.O.R.
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65kV Kovar 5.70 1.70 3.90 1.189
CFT65V1251
$351.00
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Note: 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.

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 email sales@lesker.com with your inquiry.

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