csM series
Board Mount Heat Sink
For TO-220 Devices
The economically priced CSM Series is suitable for
use with TO-220 devices found in active components
offer a range of thermal performance from 18.0 to
as well as power resistors. With surface areas rang-
9.8 C/W. Each device offers solder able mounting
ing from 1188 Sq. mm to 6645 Sq. mm, the CSM
feet and anywhere from 1, 2 or 3 mounting holes are
family comes in 5 configurations, all of them with
available for convenient device attachment.
Black Anodized surface treatment. These heatsinks
series sPeciFicatiONs
Heatsink Surface Area Weight Length L Thermal
2 2
Part Number (in / mm ) (oz / g) (mm) Res.* (C/W)
CSM221-12AE 1.84 / 1,188 0.13/ 3.7 12 18.0
CSM221-28AE 4.30 / 2,772 0.3 / 8.5 28 12.8
CSM221-40AE 6.14 / 3,960 0.43 / 12.2 40 12.1
CSM222-30AE 6.25 / 4,029 0.5 / 14.2 30 11.3
CSM223-50AE 10.30 / 6,645 0.6 / 17.0 50 9.8
*Free convection at 10 watts dissipation
Available for custom orders only, not offered as standard length
characteristics
Heat Dissipation
Heat Sink Aluminum Alloy 6063-T5 or Equivalent
Heat dissipation is the total for ALL DEVICES attached to with either degreased or black anodized
the heat sink
finish.
Air Velocity (ft./min.)
300 400 500 600 700 800 900 1000 Solder Foot Cold-rolled Steel, surface tin plated.
150
10
for improvement, use thermal joint com-
Interface
135
9
pound, 0.005 Grafoil (TGon 800 by Laird),
Thermal
120
8
or phase change material (Hi-Flow by
Resistance
105
7
Bergquist)
90
6
75 Insulator (Optional) Sil-Pad 900-S, K6 800-S and
5
60 K10 by Bergquist
4
45
3
CSM221-12AE
30 CSM221-28AE
2
CSM221-40AE
15
1
0 0
0 2 4 6 8 10 12 14
Heat Dissipated (watts)
Air Velocity (ft./min.)
300 400 500 600 700 800 900 1000
150
10
135
9
120
8
105
7
90
6
75
5
60
4
45
3
CSM222-30AE
30
2
CSM223-50AE
15 1
0 0
0 2 4 6 8 10 12 14
Heat Dissipated (watts)
(continued)
164 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info@ohmite.com
Case Temp. Rise above
Case Temp. Rise above
Ambient (C) Ambient (C)
Thermal Resistance from Case Thermal Resistance from Case
Surface to Ambient (C/watts) Surface to Ambient (C/watts)csM series
Board Mount Heat Sink For TO-220 Devices
diMeNsiONs
Dimensions in mm; M3*0.5P thread Tapping. JIS-2b standard chamfer 0.3m
CSM221-12AE CSM221-40AE
26 0.20
7
12.50
6 .20
0.20 13 0.20
12.50
9
31.20
31.20
16.60
16.60 0.20
0.20
3.50
3.50
+0/-0.20
+0-0.20
2.50
2.50
1.20
1.20
7
13 0.10 13.50 0.20
3 0.25
6 3 0.25
26
9 .10
1.7 1.7
40
12
CSM221-28AE CSM222-30AE
4.1
0.20
14.90 14.27
6.50
15 0.20 12.50 0.20
0.20
9
10.10
4.55
31.20
31.20
16.60 16.60
0.20
0.20
3.50
+0-0.20
3.50 +0/-.20
2.50
2.50
15 2 0.10
1.20
1.20
22
24 0.10
3 0.25
3 0.25
28
27 0.10
1.7
1.7
29.80
CSM223-50AE*
hOw tO Order
18 0.20
13 0.20
10.45
RoHS Compliant
11.0
CSM221-12AE
31.20
Series Extrusion Extrusion Black
type width anodized
8.9
16.60
0.20
3.50
+0-0.20
5.3
2.50
1.20
35
3 0.25
45 0.10
1.7
50
*Available for custom orders only,
not offered as standard length
rev 1/20-1
1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info@ohmite.com 165