WC-T2X-38E

## **WC Series Heatsinks For TO-220, TO-247, and TO-264 devices** 

## **F e a t u r e S** 

- Reduced assembly cost: cam clip and auto-align feature makes fasteners and fixtures obsolete 

- Maximum repeatability: clamping force of the cam clip is not degraded by repeated loading and unloading 

The unique design (patent pending) of the WC Series heat sinks combines a tin plated, solderable, integral cam clip with an compressed ceramic heat sink body for an all-in-one solution to through-hole mounting of TO-220, TO-247, and TO-264 packages. These self-aligning heat sinks feature solderable feet and an integrated clip with 13.2 (lbf) of force on the center of the device to enhance thermal performance. 

- Great electrical characteristics: ceramic material provides great electrical isolation while offering thermal performance similar to aluminum heatsinks 

- Maximum resistance to shock and vibration: light weight, resilient cam clip locks the component in place and is highly resistant to shock and vibration 

## ~~**S e r i e S  S P e C i F i C at i O N S**~~ 

|**Heatsink**|**For Package**|**Ohmite Resistor**|**Surface Area**|**Surface Area**|**Thermal**|
|---|---|---|---|---|---|
|**Part Number**|**Type **|**Series**|**(in2)**|**Weight**|**Resistance***|
|WC-T2X-38E|TO-220 , TO-247,  TBH25, TCH35,|TO-220 , TO-247,  TBH25, TCH35,|17.3|1.48 oz/42g|12°C/W|
||TO-264|TEH100||||



* at 12 watts 

## ~~**C H a r a C t e r i S t i C S**~~ 

|**Heat Sink**|95% Al2O3|
|---|---|
|**Spring Clip**|Music wire, per ASTM A228|
|**Interface thermal resistance**|for improvement, use thermal joint com-|
||pound or 0.005 Grafoil (TGon 800 by Laird)|
|**Mounting**|Vertical thru-hole mount|
|**Clip Force**|13.2 lbf.|
|**Dielectric withstanding voltage**|4KV (from clip to device)|



## **Heat Dissipation** 

## **Heat Dissipation: Aluminum vs. Ceramic** 

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Air Velocity (ft./min.)<br>200 350 550 800<br>160 7 160<br>140 140<br>120 6 120<br>WC-T2X-38E<br>100 100 (ceramic) ? ¢?le? a<br>¢ 0 R2A-CT4-38E<br>80 5 80 ¢ ¢? (aluminum)<br>¢<br>s<br>60 60 0 ¢<br>¢<br>¢<br>40 4 40 "4<br>20 20<br>0 .a 3 0 dial 4% 6ide7<br>0 6 12 16.5 0 2 4 6 8 10 12 14 16 18 20<br>Heat Dissipated (watts) Heat Dissipated (watts)<br>C) °<br>C/watts) °<br>Mounting Surface<br>Case Temp Rise Above  Ambient in Free Air (°C)<br>Temp. Rise aboveAmbient ( Surface to Ambient (<br>Thermal Resistance from Mounting<br>**----- End of picture text -----**<br>


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**180** 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 

## **WC Series Heatsinks For TO-220, TO-247, and TO-264 devices** 

## ~~**d i m e N S i O N S**~~ 

(in./ _mm ±0.3mm)_ 

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34.0mm ±1.2 20.4mm ±.3<br>1.33" 0.80"<br>38.4mm ±.4<br>1.51"<br>17.60mm ±.34 Pin diam. 3.8mm<br>0.15"<br>0.69" 1.5mm<br>0.06"<br>21mm +1/-0<br>0.83"<br>9.2mm<br>0.36"<br>diam.<br>2.0mm 2.0mm<br>0.08" 0.08"<br>**----- End of picture text -----**<br>


## ~~**O r d e r i N g  i N F O r m at i O N**~~ 

**W C - T 2 X - 3 8 E Ceramic TODevice RoHS Heatsink series Packages height Compliant** 

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1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 

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