WTS001_p50-68
6/14/07
10:46 AM
Page 54
Bonded Fin
Heat Sinks
CUSTOM BONDED FIN HEAT SINKS AND ASSEMBLIES
Wakefield Engineering offers an extensive line of natural convection and forced convection custom bonded fin heat sinks assemblies.
Configurable in a variety of ways, they are reliable, cost effective, and highly efficient thermal management
solutions for high power and densely packaged applications, even in demanding shock and vibration environments.
MECHANICAL DIMENSIONS
MOUNTING LEG
(EXTRUSION PROFILE 8930)
(EXTRUSION PROFILE 8120)
Dimensions: in. (mm)
BONDED FIN BASES
Base
Extrusion
Profile No.
8711
8731
8546
8737
8119
8712
8732
8556
8542
8671
8823
8734
8545
8709
8715
8707
8121
8733
8714
8735
Thermal Resistance
°C/W
Max #
Fins
10
15
20
18
16
25
28
24
33
30
37
19
40
37
28
42
45
60
56
60
Natural Convection
H = 2"
H = 4"
1.360
1.110
1.330
0.937
0.880
1.122
1.011
0.751
0.880
0.655
0.820
0.550
0.591
0.507
0.384
0.361
0.348
0.383
0.275
0.264
0.830
0.685
0.823
0.580
0.539
0.692
0.625
0.438
0.519
0.399
0.500
0.310
0.353
0.310
0.231
0.220
0.209
0.235
0.168
0.161
Forced Convection
H = 2"
H = 4"
0.459
0.281
0.215
0.233
0.222
0.170
0.152
0.153
0.122
0.123
0.118
0.213
0.095
0.081
0.106
0.071
0.065
0.075
0.053
0.049
0.277
0.168
0.144
0.140
0.157
0.101
0.090
0.107
0.082
0.086
0.070
0.130
0.053
0.048
0.063
0.042
0.040
0.030
0.032
0.030
W
2.800 (71.1)
3.615 (91.8)
4.000 (101.6)
4.425 (112.4)
4.750 (120.7)
5.000 (127.0)
5.650 (143.5)
6.000 (152.4)
6.620 (168.1)
7.230 (183.6)
7.440 (189.0)
7.500 (190.5)
8.000 (203.2)
8.327 (211.5)
8.780 (223.0)
10.00 (254.0)
10.78 (273.8)
12.60 (320.0)
14.00 (355.6)
15.00 (381.0)
T
0.520 (13.2)
0.575 (14.6)
0.500 (12.7)
0.650 (16.5)
0.500 (12.7)
0.530 (13.5)
0.500 (12.7)
0.500 (12.7)
0.500 (12.7)
0.550 (14.0)
0.525 (13.3)
0.560 (14.2)
0.500 (12.7)
0.400 (10.2)
0.600 (15.2)
0.550 (14.0)
0.560 (14.2)
0.600 (15.2)
0.525 (13.3)
0.625 (15.9)
FT
.050 (1.3)
.050 (1.3)
.050 (1.3)
.050 (1.3)
.050 (1.3)
.050 (1.3)
.050 (1.3)
.050 (1.3)
.050 (1.3)
.050 (1.3)
.050 (1.3)
.050 (1.3)
.050 (1.3)
.050 (1.3)
.050 (1.3)
.050 (1.3)
.050 (1.3)
.050 (1.3)
.050 (1.3)
.050 (1.3)
FP
0.275 (5.4)
0.239 (6.1)
0.200 (5.1)
0.238 (6.0)
0.288 (7.3)
0.198 (5.0)
0.200 (5.1)
0.250 (6.4)
0.200 (5.1)
0.239 (6.1)
0.200 (5.1)
0.400 (10.2)
0.200 (5.1)
0.215 (5.5)
0.270 (6.9)
0.238 (6.0)
0.238 (6.0)
0.207 (5.3)
0.250 (6.4)
0.250 (6.4)
Contact Wakefield Thermal Solutions for additional standard profile options at 603-635-2800 / sales@wakefield.com
Notes:
1. Natural and forced convection thermal resistances based on 6.000 in. length for profiles less than 8.000” wide.
2. Natural and forced convection thermal resistances based on12.000 in. length for profiles 8.000” wide and greater
3. Forced convection thermal resistance based on 500 LFM, shrouded, horizontal. distributed heat load.
4. Forced convection bonded fin assemblies use standard "muffin" fans.
5. Dimensions shown are as extruded. To improve flatness across the width, bases can be machined. Machined base thickness will be reduced.
ORDER GUIDE - EXAMPLE
Example Part Number - BE8546-1200-U4W
• BE8546 = Bonded fin base extrusion profile identifier
• Length (inches; 12.00 shown, two decimal point assumed)
• Finish (G = Gold Chromate, U = Unfinished)
• Fin Height (4 inches shown)
• Mounting Options (L = Mounting Legs, W = No Mounting Legs)
PART NUMBERING ORDER GUIDE*
BEXXXX
- XX -
X
X
X
Mounting options (L or W)
Fin Height (inches)
Finish (G or U)
Length (inches, up to 36)
BASE EXTRUSION
PROFILE NUMBER
54
NXP MCU
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