CUSTOM ENGINEERED HEAT SINKS
Forced air and natural convection profiles are available in a variety of finishes. The ability to choose
from various configurations enables the engineer to tailor the heat sink profile to meet specific
thermal needs of the application. By using the chart on the following page, fin spacing, profile
width, heat sink length, fin height and mounting options can all be selected. Approximate thermal
resistance is given for common fin heights. They are calculated with an airflow of 500LFM and a
heat sink length of 5 inches. Increases in airflow, fin height, heat sink length will provide higher
thermal performance.
Ordering Information
Using the example on the following page and drawing below, heat sinks are selected from the table
of options using the following format:
CHE01 1A 2F W
G
Plating options: gold iridite, Thermo-Coat (gray thermal paint),
clear chromate, black anodizing
Mounting options: mounting legs, fan brackets, no brackets, fans installed
Heat sink overall length in inches. (specify lengths not shown)
Fin height in half-inch increments. (specify lengths not shown)
Base Profile includes base thickness, fin spacing, number of fins, fin pitch, fin thickness,
base width
ORDERING INFORMATION:
CHE 01
1A 2F
W
G
CUSTOM ENGINEERED HEAT SINKS
PLATING OPTIONS
G
C
N
T
B
GOLD IRIDITE
CLEAR CHROMATE
NO FINISH OR PLATING
(WASH & ETCH)
THERMO-COAT
(GREY THERMAL PAINT)
BLACK ANODIZING
MOUNTING OPTIONS
L LEG MOUNTS
W NO BRACKETS
F FAN SHROUD & LEGS
H FAN INSTALLED
FIN HEIGHT in.
1A
1B
1C
1D
1E
1F
1G
1H
1I
1.50
2.00
2.50
3.00
3.50
4.00
4.50
5.00
5.50
BASE LENGTH in.
2A
2B
2C
2D
2E
2F
2G
2H
2I
2J
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00
11.00
2K
2L
2M
2N
2O
2P
2Q
2R
2S
12.00
13.00
14.00
15.00
16.00
17.00
18.00
19.00
20.00
CUSTOM ENGINEERED PROFILES
--measurements in inches
Base #
13
14
01
15
02
25
03
24
16
04
17
18
05
22
06
26
23
07
19
08
09
20
10
11
21
Base
Width
1.20”
2.37”
2.40”
4.00”
4.60”
4.75”
4.78”
4.78”
5.00”
5.65”
6.25”
6.61”
6.80”
6.93”
7.38”
7.37”
8.00”
8.06”
8.35”
10.78”
11.25”
12.00”
12.45”
15.00”
17.00
Base
Thickness
.37”
.26”
.25”
.50”
.37”
.62”
.50”
.60”
.52”
.50”
.60”
.50”
.50”
.39”
.50”
.50”
.50”
.57”
.56”
.55”
.60”
.54”
.54”
.58”
.50”
Fin
Thickness
.040”
.040”
.032”
.050”
.040”
.050”
.063”
.050”
.040”
.050”
.050”
.050”
.050”
.050”
.050”
.080”
.040”
.032”
.050”
.050”
.050”
.040”
.050”
.050”
.090”
#Fins
8
18
16
20
30
20
16
20
39
28
33
33
34
46
19
20
63
64
33
45
44
95
60
60
49
Fin
Pitch
.150”
.132”
.150”
.200”
.150”
.236”
.288”
.228”
.125”
.200”
.185”
.200”
.200”
.150”
.340”
.364”
.125”
.125”
.238”
.238”
.250”
.125”
.185”
.250”
.348”
Fin
Spacing
.110”
.092”
.118”
.150”
.110”
.186”
.225”
.178”
.085”
.150”
.135”
.150”
.150”
.100”
.290”
.284”
.085”
.093”
.188”
.188”
.200”
.085”
.135”
.200”
.258”
Thermal
Resistance
Examples
°
C/W
2″ Fin
″
Height
.50
.25
.25
.20
.13
.20
.24
.20
.12
.15
.13
.12
.12
.11
.30
.22
.07
.07
.14
.09
.10
.08
.06
.07
.08
4″ Fin
″
Height
.26
.13
.12
.11
.07
.10
.13
.10
.06
.07
.06
.06
.06
.06
-
.12
-
.04
.07
.05
.05
-
.03
.04
.04
