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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 - 45.0 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

ULP Series ULP picture
Balance between high performance
and low pressure drop

Fin Dimensions

Thickness : 0.45 - 0.55 mm
Gap : 2.34 - 2.65 mm

Heat Sink Height

6.0 - 25.0 mm

W Series W picture
Standard elliptical fin

Fin Dimensions

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

Heat Sink Height

10.0 - 45.0 mm

TL Series TL picture
0.25mm fin thickness

Fin Dimensions

Thickness : 0.25 mm
Gap : 1.57 - 1.68 mm

Heat Sink Height

4.0 - 6.0 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

12.0 - 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

8.0 - 25.0 mm

Z Series Z picture
0.35mm fin thickness

Fin Dimensions

Thickness : 0.35 mm
Gap : 1.13 - 1.21 mm

Heat Sink Height

6.3 - 15 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 - 45.0 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
120x120
130x130
Larger Size

Rectangle

heatsinkv heatsinkv

10x20

20x10

20x30

30x20

20x35

35x20

20x40

40x20

30x40

40x30

35x50

50x35

40x50

50x40

40x60

60x40

50x70

70x50

50x75

75x50

60x80

80x60

80x90

90x80

70x100

100x70

80x100

100x80

60x120

120x60

80x120

120x80

70x130

130x70

Larger Size

Base Size (mm)

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