Anchors (left photo) are mounted on the PCB. The Z-shape clips (middle photo) secures the heat sink to the anchors. The PCB thickness and anchor pitch dimensions will vary for each board/layout, so please review the following in order to choose the most appropriate Z-shape clip, Anchor, and Heatsink.
We offer two basic types of Z-shape clips:
The following is a list of our standard clips. Check anchor pitch dimensions to choose the most appropriate clip.
The use of a standard clip is preferable, but a custom clip can be quickly created if required.
Final anchor locations may need to be sligthtly modified, depending on heat source height, heat sink base thickness, and fin geometry.
X x Y (mm)
|EZR-50x35||50 x 35||DXF||STEP||IGES||
|EZR-60x45||60 x 45||DXF||STEP||IGES|
|EZR-70x55||70 x 55||DXF||STEP||IGES|
|EZL-50x35||50 x 35||DXF||STEP||IGES|
|EZL-60x45||60 x 45||DXF||STEP||IGES|
|EZL-70x55||70 x 55||DXF||STEP||IGES|
X x Y (mm)
|Z-CL35.5RX48.2||35.5 x 48.2||DXF||STEP||IGES||
|Z-CL44.9RX53.5||44.9 x 53.5||DXF||STEP||IGES|
|Z-CL48.2RX60.9||48.2 x 60.9||DXF||STEP||IGES|
|Z-CL55.8RX60.9||55.8 x 60.9||DXF||STEP||IGES|
|Z-CL47.5RX76.2||47.5 x 76.2||DXF||STEP||IGES|
|Z-CL35.5X48.2||35.5 x 48.2||DXF||STEP||IGES|
|Z-CL44.9X53.5||44.9 x 53.5||DXF||STEP||IGES|
|Z-CL48.2X60.9||48.2 x 60.9||DXF||STEP||IGES|
|Z-CL55.8X60.9||55.8 x 60.9||DXF||STEP||IGES|
|Z-CL47.5X76.2||47.5 x 76.2||DXF||STEP||IGES|
We offer two basic types of Anchors:
|Model||Type||* PCB thickness
PCB thickness (mm)
* When selecting the appropriate anchor, please consider the clip attchment load for your heat source.
Note: In some cases, the clip may not be able to contact the exact center of a particular heat sink. This will depend on the fin pattern, air direction, and other factors. Please refer to the following table.
This table only lists the physical dimensions as OK or not OK. Please consult Choosing a heat sink to determine if the heat sink will meet the thermal requirements.
Explanation of this table
This table displays heat sink and Z-shape clip pairings based on the direction of clip attachment. With the V type, the Z-shape clip runs perpendicular (opposite) of airflow/fin direction (left photo). The H type runs parallel (inline) with the airflow/fin direction (right photo). Please refer to the photos and check the airflow direction prior to pairing selection.
The meaning of each Symbol
|OK||Z-shape clip can be assembled at the center of heat sink.|
|Z-shape clip can NOT be assembled at the center of heat sink. We do not recommend this attachment in the case of a "V" type. The clip pressure point would be too far from center.|
|Blank||Z-shape clip can NOT be used at all.|
|*||Due to installation difficulty, we do not recommend the use of Z-shape clips with these series of heat sinks if they are taller than 15mm.|
|**||The heat sink may interfere with the solder anchors. The heat sink will NOT interfere with the solderless anchors.|
Clip attachment force can be calculated from the following graph. Please note that this data is just for reference. Unknown dimensions and tolerances can sifnificnatly affect final clip load.
1st, Calculate X value for the graph below based on the formula provided below the graph.
2nd, Y value (Clip load) can be found from the intersection of "X value" and "Z-shape clip performance line".
© 2007 Alpha Novatech, Inc.