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Passive Heat Sink

Passive Heat Sink Quick Reference
Fin type/Pin type hover/click button for info
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Alpha's passive heat sinks
There will always be a tradeoff between fin density, thermal performance, and pressure drop. A heat sink with a dense fin pattern will always outperform a comparable heat sink with a sparser fin pattern at a given airflow. However, a denser fin pattern will generate a significantly higher pressure drop, requiring more powerful fans to generate a given airflow.
Thermal Resistance
Pressure Drop

Related Information

Choosing a heat sink
Custom Heat Sink

LPD Series LPD picture
Low Pressure Drop Type

Fin Dimensions

Thickness : 0.75 - 0.95 mm
Gap : 3.10 - 4.10 mm

Heat Sink Height

3.0 - 40.0 mm

MD Series MD picture
Middle Density Type

Fin Dimensions

Thickness : 0.75 - 0.95 mm
Gap : 2.28 - 2.98 mm

Heat Sink Height

6.0 - 40.0 mm

W Series W picture
Stanadrd elliptical fin

Fin Dimensions

Thickness : 0.80 - 1.80 mm
Gap : 1.80 - 2.34 mm

Heat Sink Height

10.0 - 45.0 mm

L Series L picture
High Profile Type

Fin Dimensions

Thickness : 1.10 mm
Gap : 2.34 mm

Heat Sink Height

30.0 - 40.0 mm

LC Series LC picture
Copper Embedded L Type Heat Sink

Fin Dimensions

Thickness : 1.10 mm
Gap : 2.34 mm

Heat Sink Height

30.0 - 40.0 mm

LT Series LT picture
Line Type fin

Fin Dimensions

Thickness : 0.70 - 0.90 mm
Gap : 1.86 - 2.29 mm

Heat Sink Height

20.0 - 45.0 mm

UB Series UB picture
0.55mm Elliptical Fins

Fin Dimensions

Thickness : 0.50 - 0.60 mm
Gap : 1.36-1.64 mm

Heat Sink Height

5.0 - 30.0 mm

UBC Series UBC picture
Copper Embedded UB Type Heat Sink

Fin Dimensions

Thickness : 0.54 - 0.55 mm
Gap : 1.45-1.64 mm

Heat Sink Height

10.0 - 25.0 mm

Z Series Z picture
0.35mm fin thickness

Fin Dimensions

Thickness : 0.35 mm
Gap : 1.13 - 1.17 mm

Heat Sink Height

6.3 - 12.7 mm

T Series T picture
0.23mm fin thickness
For small package

Fin Dimensions

Thickness : 0.23 mm
Gap : 1.02 - 1.04 mm

Heat Sink Height

3.0 - 6.0 mm

N Series N picture
Omnidirectional hexagon pin fin heat sinks. Sparse fin pattern. Suitable for natural convection.

Pin Dimensions

Thickness : 1.90 - 2.50 mm
Gap : 5.78 - 7.87 mm

Heat Sink Height

10.0 - 40.0 mm

CS Series CS picture
High Aspect Ratio
Omnidirectional square pin fin heat sinks.

Pin Dimensions

Thickness : 1.45 mm
Gap : 2.31 - 2.59 mm

Heat Sink Height

50.0 mm

S Series S picture
Omnidirectional square pin fin heat sinks

Pin Dimensions

Thickness : 1.45 - 2.00 mm
Gap : 1.75 - 2.60 mm

Heat Sink Height

5.0 - 40.0 mm

ST Series ST picture
Omnidirectional heat sinks featuring thin, low profile, pins. Suitable for applications with very limited space.

Pin Dimensions

Thickness : 0.75 - 0.80 mm
Gap : 1.20 - 1.40 mm

Heat Sink Height

4.0 - 7.0 mm

Natural Convection
Quick Reference by Heat Sink Base Size

Base Size (mm)

10x10
15x15
17x17
19x19
22x22
25x25
28x28
30x30
32x32
35x35
38x38
40x40
42x42
45x45
48x48
50x50
52x52
54x54
55x55
60x60
70x70
80x80
90x90
100x100
20x30
20x40
30x20
30x40
35x50
40x20
40x30
40x60
50x35
50x70
60x40
60x80
60x120
70x50
70x130
80x60
80x90
80x100
90x80
100x80
120x60
130x70

Base Size (mm)

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