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Resistors for Pulsed Power
R Series
R Series
Pulsed power applications present a unique set of thermal problems. Frequent cycling of power can cause materials to expand rapidly, sometimes with destructive effects.
By closely matching the Coefficient of Thermal Expansion (CTE) of adjoining materials, catastophic failures can be eliminated.
By closely matching the Coefficient of Thermal Expansion (CTE) of adjoining materials, catastophic failures can be eliminated.
Below are some of Barry Industries' Standard Copper-Tungsten flanged resistors. Engineers are welcome to contact us and we will design a Copper-Tungsten flanged resistor to your exact specifications.
Customer defined testing is available on all Barry devices.
Customer defined testing is available on all Barry devices.
To minimize CTE mismatch and increase thermal conductivity, a Gold-Germanium eutectic is used to bond the BeO to the flange. To further minimize CTE mismatch, a Copper-Tungsten flange is used.
The Gold-Germanium layer is chemically compatible with the Gold plated ajoining layers, and no embittling metallics will form. The Gold matrix exhibits outstanding ductility, corrosion resistance, low diffusivity and low toxicity, as opposed to lead.
The Gold-Germanium layer is chemically compatible with the Gold plated ajoining layers, and no embittling metallics will form. The Gold matrix exhibits outstanding ductility, corrosion resistance, low diffusivity and low toxicity, as opposed to lead.
Specifications:
Resistive Element:
Substrate:
Mounting Flange
Leads:
Resistive Element:
Substrate:
Mounting Flange
Leads:
Proprietary Thick Film
BeO
Copper-Tungsten
Gold Plated Copper (.005" thick)
BeO
Copper-Tungsten
Gold Plated Copper (.005" thick)
Cycling Test Details
• Applied Power: 250W
• Cycle: 10 seconds On, 10 seconds Off
Cycling Test Results
• All Copper flanged resistors failed after 600 cycles
• All Copper-Tungsten flanged resistors still operational after 500,000 cycles
• Applied Power: 250W
• Cycle: 10 seconds On, 10 seconds Off
Cycling Test Results
• All Copper flanged resistors failed after 600 cycles
• All Copper-Tungsten flanged resistors still operational after 500,000 cycles
|
CW Power
(Max) (W) |
Configuration
|
Ceramic |
A
Length |
B Width |
C
Hole to Hole or Hole to Edge |
D
Lead Width |
E From Bottom Face of Lead |
F (Max) Height |
G Hole Diameter |
RoHS
|
Data Sheet |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 30 |
 |
BeO | 0.515" | 0.250" | 0.125" | 0.060" | 0.105" | 0.140" | 0.130" | Yes |
 |
| 50 |
|
BeO | 0.515" | 0.250" | 0.125" | 0.060" | 0.105" | 0.140" | 0.130" | Yes |
|
| 80 |
|
BeO | 0.515 | 0.250" | 0.125" | 0.060" | 0.125" | 0.160" | 0.130" | Yes |
|
| 150 |
 |
BeO | 0.800" | 0.230" | 0.600"- 0.560" |
0.040" | 0.105" | 0.140" | 0.130" | Yes |
|
| 250 |
|
BeO | 0.975" | 0.375" | 0.725" | 0.120" | 0.165" | 0.200" | 0.130" | Yes |
|
| 400 |
|
BeO | 1.100" | 0.500" | 0.800" | 0.250" | 0.165" | 0.200" | 0.170" | Yes |
|
| 800 |
 |
BeO | 1.90" | 0.500" | 1.550" | 0.250" | 0.190" | 0.250" | 0.170" (4X) |
Yes |
|
One Hole High Power
Flange Resistor Configuration
Flange Resistor Configuration
Two Hole High Power
Flange Resistor Configuration
Flange Resistor Configuration
Four Hole High Power
Flange Resistor Configuration
Flange Resistor Configuration
For more information regarding the benefits of using Copper-Tungsten flanged resistors high thermal cycle environments click here
