C264-058-2AE

**C Series TO-126, TO-247, TO-220 and TO-264 Package Heatsinks** Soe Ohmite introduces the C series (Pat. Pending). This series offers high performance, low cost and a compact heat sink with an integrated camming clip system for TO-126, TO-220, TO-247 and TO-264 devices. This powerful heat sink provides tool and fixture free assembly operation, largest surface areas and smallest space occupation. It is the ideal type of heat sink for high power density and small size (1U or 2U) electronic packaging with forced convection cooling. 

## ~~**S E R i E S  S P E C i F i C AT i O N S**~~ 

||**Surface**|||
|---|---|---|---|
|**Heatsink**|**Area**|**Weight**|**Length “L”**|
|**Part Number**|**(in2/mm2)**|**(oz/g)**|**(mm)**|
|C247-025|11 / 7,312|0.5 / 15|25|
|C247-050|23 / 14,858|1.1 / 31|50|
|C247-075|34 / 21,655|1.6 / 45|75|
|C264-030<br>C264-058<br>C264-085|13 / 8,774<br>25 / 16,963<br>37 / 24,861|0.7 / 19<br>1.35 / 37<br>1.97 / 54|30<br>58<br>85|
|C220-025<br>C220-050<br>C220-075<br>C126-025<br>C126-040<br>C126-050<br>C126-075|11 / 7,312<br>23 / 14,858<br>34 / 21,655<br>10.2 / 6,559<br>16.3 / 10,495<br>20.4 / 13,119<br>30.6 / 21,655|0.5 / 15<br>1.1 / 31<br>1.6 / 45<br>0.45 / 12.7<br>0.72 / 20.3<br>0.90 / 25.4<br>1.35 / 38.1|25<br>50<br>75<br>0.45 / 12.7<br>25<br>0.72 / 20.3<br>40<br>0.90 / 25.4<br>50<br>1.35 / 38.1<br>75|



## **F E A T U R E S** 

- Minimum assembly cost and labor Spring Clips make the mounting holes, fasteners, tools and fixtures obsolete in assembly operations & reduce costs. 

- Maximum Thermal Transfer Maximum surface area per unit volume, efficient cooling fins & consistent mounting force reduces thermal resistance. 

- Maximum Repeatability Constant spring force over repeated assembly/disassembly. 

- Maximum Reliability Resilient spring action locks electronic component in place. Fewer parts in assembly and no fasteners and washers required. Prevent short circuit by eliminating metal particles generated from hardware or thread tapping. 

- Design Flexibility Maximum flexibility for dynamic device locations and power upgrading. “Configureto-Fit” gives designers total freedom to configure heat sink needed to fit into a multitude design environments. 

## ~~**C h A R A C T E R i S T i C S**~~ 

|**Heat Sink**|Aluminum Alloy 6063-T5 or Equivalent|
|---|---|
||with either degreased or black anod-|
||ized finish.|
|**Spring Clip**|Music Wire, Per ASTM A228 with|
||bright nickelplating|
|**Solder Foot**|Cold-rolled Steel, Per ASTM A-366|
||with pure tin over copper strike. RoHS|
||compliant.|
|**Interface**|for improvement, use thermal joint|
|**Thermal**|compound, 0.005 Grafoil (TGon 800|
|**Resistance**|by Laird), or phase change material|
||(Hi-Flow byBergquist)|
|**Insulato**r|(Optional) Sil-Pad 900-S, K6 800-S|
||and K10 byBergquist|



## ~~**h E AT  D i S S i PAT i O N**~~ 

Heat dissipation is the total for ALL DEVICES attached to heatsink. 

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**----- Start of picture text -----**<br>
Air Velocity (ft./min.) Air Velocity (ft./min.)<br>200 400 600 800 1000 200 400 600 800 1000<br>140 9 38<br>120 C247-025-1AE (1 device)C247-050-2AE (2 devices) 8 36 TO-126/CE-S102 (25mm long) one device w/Sil-pad 900s 12<br>C247-075-3AE (3 devices)<br>7<br>100 34 10<br>6<br>32<br>80 5<br>30 8<br>60 4<br>28<br>3<br>40 6<br>2 26<br>20<br>1 24<br>4<br>0 0 22 ca<br>0 5 10 15 2 3 4 5 6 7 8 9 10<br>Heat Dissipated, total for ALL devices (watts) Total Heat Dissipated (watts) (continued)<br>C) °<br>C/watts) ° C) above Ambient ( ° C/watts) °<br>Case to Ambient (  Average Heat Sink Temp. Rise Surface to Ambient (<br>Thermal Resistance from Mounting<br> Case Temp. Rise above Ambient (<br>Avg. Thermal Resistance from Mounting<br>**----- End of picture text -----**<br>


**166** 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 

## **C Series** 

## **TO-126, TO-247, TO-220 and TO-264 Package Heatsinks** 

## ~~**D i m E N S i O N S**~~ 

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**----- Start of picture text -----**<br>
0.806"  0.785"<br>with TO-247 with TO-220<br>or TO-264 (19.94mm) TO-247<br>0.77"  (20.47mm)<br>(19.6mm) 0.71"<br>(18mm) TO-126 & TO-220<br>0.73"<br>with TO-126 (18.6mm)<br>0.57"<br>1.28"  1.50"  (14.48mm)<br>(32.5mm) (38mm)<br>1.12"  TO-264<br>0.73"  (28.5mm)<br>(18.5mm)<br>0.35"<br>(8.89mm)<br>0.10"  0.10"  0.73"<br>(2.5mm) 0.100"  (2.5mm) 0.100"  L-0.16"  (4.06mm) (18.54mm)<br>(2.5mm) (2.54mm)<br>(all models) 0.08"<br>0.385"  0.385"  (2.08mm)<br>(9.78mm) (9.78mm) (all models)<br>Land Pattern<br>X and Y dimensions at user discretion<br>ø 0.07" pth typ C L C L ø 0.10" pth<br>(1.8mm) Y X (2.5mm)<br>TO-126<br>0.71"  0.73"<br>(18.0mm) (18.6mm)<br>0.18"<br>(4.6mm) L – 0.16" (4.06mm) 0.08"<br>L (2.0mm)<br>**----- End of picture text -----**<br>


## ~~**h O w  T O  O R D E R**~~ 

## **Standard part numbers** 

|**C **<br>**Ser**|**2 4 7 - 0 2 5 - 1 A E**<br>**ies**<br>**No. of**<br>**clips**<br>**Clip size**<br>**Finish**<br>A = black anodized<br>V = degreased<br>**Length**<br>(mm)<br>**RoHS Compliant**||
|---|---|---|
|||**No Finish(degreased)**<br>**Black Anodized**<br>**No. of Clips**|
|||C247-025-1VE<br>C247-025-1AE<br>1<br>C247-050-2VE<br>C247-050-2AE<br>2<br>C247-075-3VE<br>C247-075-3AE<br>3|
|||C264-030-1VE<br>C264-030-1AE<br>1<br>C264-058-2VE<br>C264-058-2AE<br>2<br>C264-085-3VE<br>C264-085-3AE<br>3|
|||C220-025-1VE<br>C220-025-1AE<br>1<br>C220-050-2VE<br>C220-050-2AE<br>2<br>C220-075-3VE<br>C220-075-3AE<br>3|
|||C126-025-1VE<br>C126-025-1AE<br>1|
|||Packaging: Bulk|



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rev 2/19-1 

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

**167**