Pin Fin Heat Sinks for Medium to High Airflow Applications

Round Pin Heat Sink by Cold Forging

Cold-forged round-pin heat sinks are the ultimate solution for mission-critical applications, especially for systems where the airflow speed or direction may change during service.

  1. Round pin fin heat sinks are omni-directional – the airflow can come from any direction, and changes in airflow patterns (e.g. fan failure) only have minimum impact on their performance.
  2. Pin fin heat sinks are cold-forged from pure aluminum, whose thermal conductivity is much higher than other aluminum alloys like 6063 and 6061.
  3. The high pressure used in cold-forging process ensures that no air bubbles, porosity or other impurities are trapped in the material and thus produces heat sinks with extremely high quality.
  4. S805 series are optimized for medium to high airflow applications; S807 series are optimized for natural convection and low airflow applications.
  5. Standard size ranges from 15×15 (0.6″x0.6″) to 125×100 mm (5″x4″), and height from 9.5 to 30 mm (0.37-1.18″); Both size and height are fully customizable.

S805 Series – Optimized for Medium to High Airflow Applications

Part
Number
Width
(mm)
Length
(mm)
Height
(mm)
Weight
(g)
θSA (°C/W)
1.0 m/sec
(200 LFM)
θSA (°C/W)
2.0 m/sec
(400 LFM)
θSA (°C/W)
3.0 m/sec
(600 LFM)
θSA (°C/W)
4.0 m/sec
(800 LFM)
Attachment
Options
(see notes)
Request
Quote
Request
Sample
S805-15-15-101515102.39.937.105.855.101, 2, 3, 4QuoteSample
S805-15-15-151515152.96.394.643.873.411, 2, 3, 4QuoteSample
S805-17-17-101717103.26.084.353.593.131, 2, 3, 4QuoteSample
S805-17-17-151717154.13.892.842.372.091, 2, 3, 4QuoteSample
S805-19-19-101919103.76.444.603.793.311, 2, 3, 4QuoteSample
S805-19-19-151919154.64.133.002.502.201, 2, 3, 4QuoteSample
S805-23-23-102323105.44.513.232.662.321, 2, 3, 4QuoteSample
S805-23-23-152323156.72.892.101.751.541, 2, 3, 4QuoteSample
S805-27-27-102727107.53.342.391.971.721, 2, 3, 4QuoteSample
S805-27-27-152727159.12.141.551.291.141, 2, 3, 4QuoteSample
S805-35-35-1035351013.41.571.120.920.811, 2, 3, 4QuoteSample
S805-35-35-1535351516.91.000.730.610.541, 2, 3, 4QuoteSample
S805-40-40-1040401017.01.330.950.780.681, 2, 3, 4QuoteSample
S805-40-40-1540401521.20.840.610.510.451, 2, 3, 4QuoteSample
S805-40-40-2540402538.80.560.420.360.321, 2, 3, 4QuoteSample
S805-40-40-3040403044.00.490.370.320.291, 2, 3, 4QuoteSample
S805-45-45-1045451022.40.930.660.550.481, 2, 3, 4QuoteSample
S805-45-45-1545451528.20.590.430.360.321, 2, 3, 4QuoteSample
S805-45-45-2545452552.90.380.280.240.221, 2, 3, 4QuoteSample
S805-45-45-3045453060.30.330.250.220.201, 2, 3, 4QuoteSample
S805-50-50-1050501027.00.810.580.480.421, 2, 3, 4QuoteSample
S805-50-50-1550501533.70.520.380.310.281, 2, 3, 4QuoteSample
S805-50-50-2550502563.40.330.250.210.191, 2, 3, 4QuoteSample
S805-50-50-3050503072.10.280.220.190.171, 2, 3, 4QuoteSample
S805-60-30-1060301019.21.180.850.700.611, 2, 3, 4QuoteSample
S805-60-30-1560301523.80.750.550.460.401, 2, 3, 4QuoteSample
S805-60-30-2560302545.30.460.340.290.261, 2, 3, 4QuoteSample
S805-60-30-3060303051.50.400.310.260.241, 2, 3, 4QuoteSample
S805-60-60-1060601041.60.600.430.350.311, 2, 3, 4QuoteSample
S805-60-60-1560601553.20.380.270.230.201, 2, 3, 4QuoteSample
S805-60-60-2560602587.40.250.190.160.141, 2, 3, 4QuoteSample
S805-60-60-3060603098.90.220.170.140.131, 2, 3, 4QuoteSample
S805-70-30-1070301022.41.000.720.590.521, 2, 3, 4QuoteSample
S805-70-30-1570301527.90.640.470.390.341, 2, 3, 4QuoteSample
S805-70-30-2570302553.70.380.290.240.221, 2, 3, 4QuoteSample
S805-70-30-3070303061.10.330.250.220.201, 2, 3, 4QuoteSample
S805-70-50-1070501038.10.5670.4060.3350.2921, 2, 3, 4QuoteSample
S805-70-50-1570501547.70.3610.2630.2190.1931, 2, 3, 4QuoteSample
S805-70-50-2570502588.20.2360.1770.1510.1351, 2, 3, 4QuoteSample
S805-70-50-307050301000.2050.1570.1350.1231, 2, 3, 4QuoteSample
S805-70-70-1070701058.00.4100.2930.2410.2101, 2, 3, 4QuoteSample
S805-70-70-1570701574.60.2580.1870.1550.1371, 2, 3, 4QuoteSample
S805-70-70-257070251230.1710.1290.1100.0981, 2, 3, 4QuoteSample
S805-70-70-307070301390.1490.1140.0980.0891, 2, 3, 4QuoteSample
S805-80-40-1080401037.80.6290.4490.3700.3221, 2, 3, 4QuoteSample
S805-80-40-1580401548.50.3970.2880.2390.2111, 2, 3, 4QuoteSample
S805-80-40-2580402579.80.2640.1980.1690.1511, 2, 3, 4QuoteSample
S805-80-40-3080403090.60.2300.1760.1520.1371, 2, 3, 4QuoteSample
S805-80-80-1080801077.20.2970.2120.1750.1521, 2, 3, 4QuoteSample
S805-80-80-1580801599.80.1870.1360.1130.0991, 2, 3, 4QuoteSample
S805-80-80-258080251640.1240.0930.0800.0711, 2, 3, 4QuoteSample
S805-80-80-308080301870.1080.0830.0720.0651, 2, 3, 4QuoteSample
S805-90-45-1090451046.80.5320.3800.3130.2721, 2, 3, 4QuoteSample
S805-90-45-1590451559.80.3360.2430.2020.1781, 2, 3, 4QuoteSample
S805-90-45-2590452598.30.2230.1670.1420.1271, 2, 3, 4QuoteSample
S805-90-45-309045301110.1930.1480.1270.1151, 2, 3, 4QuoteSample
S805-90-90-1090901095.40.2530.1800.1490.1291, 2, 3, 4QuoteSample
S805-90-90-159090151230.1590.1150.0960.0841, 2, 3, 4QuoteSample
S805-90-90-259090252020.1050.0790.0670.0601, 2, 3, 4QuoteSample
S805-90-90-309090302290.0910.0700.0600.0551, 2, 3, 4QuoteSample
S805-100-50-10100501059.80.3880.2770.2280.1991, 2, 3, 4QuoteSample
S805-100-50-15100501577.10.2450.1770.1480.1301, 2, 3, 4QuoteSample
S805-100-50-2510050251270.1630.1220.1040.0931, 2, 3, 4QuoteSample
S805-100-50-3010050301440.1410.1080.0940.0851, 2, 3, 4QuoteSample
S805-100-100-10100100101200.1960.1400.1150.1001, 2, 3, 4QuoteSample
S805-100-100-15100100151540.1230.0890.0740.0651, 2, 3, 4QuoteSample
S805-100-100-25100100252540.0820.0610.0520.0471, 2, 3, 4QuoteSample
S805-100-100-30100100302880.0710.0540.0470.0421, 2, 3, 4QuoteSample
S805-120-60-10120601084.40.2870.2050.1690.1471, 2, 3, 4QuoteSample
S805-120-60-1512060151080.1810.1310.1090.0961, 2, 3, 4QuoteSample
S805-120-60-2512060251780.1200.0900.0770.0691, 2, 3, 4QuoteSample
S805-120-60-3012060302020.1040.080.0690.0621, 2, 3, 4QuoteSample
S805-120-90-1012090101280.1870.1330.1100.0961, 2, 3, 4QuoteSample
S805-120-90-1512090151640.1170.0850.0710.0621, 2, 3, 4QuoteSample
S805-120-90-2512090252700.0780.0590.0500.0451, 2, 3, 4QuoteSample
S805-120-90-3012090303070.0680.0520.0450.0401, 2, 3, 4QuoteSample
S805-125-95-1012595101420.1650.1180.0970.0851, 2, 3, 4QuoteSample
S805-125-95-1512595151830.1040.0750.0630.0551, 2, 3, 4QuoteSample
S805-125-95-2512595253010.0690.0520.0440.0401, 2, 3, 4QuoteSample
S805-125-95-3012595303420.0600.0460.0400.0361, 2, 3, 4QuoteSample
S805-125-100-10125100101480.1600.1140.0940.0821, 2, 3, 4QuoteSample
S805-125-100-15125100151910.1000.0730.0610.0531, 2, 3, 4QuoteSample
S805-125-100-25125100253140.0670.0500.0430.0381, 2, 3, 4QuoteSample
S805-125-100-30125100303570.0580.0440.0380.0351, 2, 3, 4QuoteSample

Notes: Attachment Options: 1=push pins, 2=captive screws, 3=thermal tape, 4=grease; Thermal resistance data are for reference only.

Build Your Own Heat Sink – Semi-custom heat sink optimized to your application

You can specify the width, length and height of your heat sink. Our optimized semi-custom heat sinks are built for fast selection and deployment. There is no tooling cost or minimum order requirements, and the lead time for sampling and production is very short.

Round Pin Heat Sink Dimensions

Width
 

Length
 

Height
 

Estimated Airflow Rate
(Enter ‘0’ for Natural Convection)
 

 

Recommended Attachment Method and Thermal Interface Material

The S805 series are designed to work with thermal grease and adhesive tapes. Large size heat sinks can also be attached using wire clips or spring loaded methods. Push pins and captives screws are available attachment options.

For thermal tapes, we recommend 3M 8810 and MHS T302.

Other Benefits of Cold-Forged Round-Pin Heat Sinks

In additional to the benefits mentioned above, round pin heat sinks are also the best solution for impingement cooling, which consists of a fan mounted on top of the heat sink (namely, fansink or CPU cooler).

Round pin heat sinks offer very low thermal resistance at low airflow rates. They are particularly good for natural convection, limited airflow, fan failure and highly populated PCB.

Round pin heat sinks also offer low pressure drop, due to its smooth pin shape. Low pressure drop improves heat transfer in the entire system, especially the region behind the heat sink.

In cold forging, the pins are an integral part of the heat sink base – they are simply squeezed out of the base by high pressure. Unlike bonded fin heat sinks, there is no thermal resistance between the pins and the base in cold-forged heat sinks.

In addition to aluminum heat sinks, we also offer round pin heat sinks made of pure copper (C11000). Copper heat sinks typically improve thermal performance by 10-20%. They are recommended for critical applications where a few degrees of temperature reduction can make a big difference.

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