218-40CT3 Wakefield Thermal Solutions, 218-40CT3 Datasheet - Page 18

• Manufacturer Part Number: 218-40CT3
• Description: HEATSINK ALUM BLACK SMD
• Manufacturer: Wakefield Thermal Solutions
• Series: 218r

Specifications of 218-40CT3

• Thermal Resistance: 21 C / W
• Height: 0.4" (10.16mm)
• Package Cooled: SMD
• Attachment Method: SMD Pad
• Outline: 22.86mm x 8.12mm
• Power Dissipation @ Temperature Rise: 2W @ 52°C
• Thermal Resistance @ Forced Air Flow: 21°C/W @ 200 LFM
• Thermal Resistance @ Natural: 31°C/W
• Product: Heatsinks
• Mounting Style: SMD/SMT
• Heatsink Material: Aluminum
• Fin Style: Folded
• Dimensions: 22.86 mm L x 8 mm W x 10.16 mm H
• Designed For: SMT Devices
• Packages Cooled: TO-218 / TO-220
• Width: 22.9mm
• Heat Sink Material: Copper
• Mounting Type: PC Board Surface Mount
• Length: 8mm
• Body Plating: Matte Tin
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 21840CT3; 345-1082

WTS001_p26-49
BOARD LEVEL POWER SEMICONDUCTOR HEAT SINKS
These slim profile unidirectional fin heat sinks offer users two assembly alternatives for verti-
cally mounting TO-220 and TO-218 components. Models are available with or without wave-
Wave-solderable pins on 1 in. centers for vertical mounting on printed circuit boards. Maxi-
mum semiconductor package width 0.625 in. (15.9). Use this heat sink where weight and
MECHANICAL DIMENSIONS
MECHANICAL DIMENSIONS
Dimensions: in. (mm)
Dimensions: in. (mm)
Notes:
1. Thermal compound is as-
2. Tab temp with longer heat
sumed between device
and heat sink.
sink (634-20ABP) will
typically be about 15%
cooler. Tab temp with
shorter heat sink
(634- I0ABP) will typically
be about 25% higher.
6/14/07
10:56 AM
Material: Aluminum, Black Anodized.
Standard
P/N
637-10ABEP
637-15ABEP
637-20ABEP
637-25ABEP
Material: Aluminum, Black Anodized
634 SERIES
637 SERIES
634-10ABEP
634-15ABEP
634-20ABEP
Plain Pin
Page 39
Standard
P/N
PC Board “A”
Slim Profile Unidirectional Fin Vertical Mount Heat Sink
1.000 (25.4)
1.500 (38.1)
2.000 (50.8)
2.500 (63.5)
High-Efficiency Heat Sinks For Vertical Board Mounting
Height Above
in. (mm)
Without Pin
634-10AB
634-15AB
634-20AB
(EXTRUSION PROFILE 5183)
634 SERIES
637 SERIES
1.375 (34.9) x 0.500 (12.7)
1.375 (34.9) x 0.500 (12.7)
1.375 (34.9) x 0.500 (12.7)
1.375 (34.9) x 0.500 (12.7)
Maximum Footprint
in. (mm)
Height Above
1.000 (25.4)
1.500 (38.1)
2.000 (50.8)
PC Board
in. (mm)
solderable pins on 0.40 in. (10.2) centers, making them ideal for a variety of applications
where quick assembly is needed and space is at a premium.
board space occupied must be minimized. Refer to the Accessory products section for thermal
interface materials, thermal compounds, and other accessories products.
0.640 (16.26) x 0.640 (16.26)
0.640 (16.26) x 0.640 (16.26)
0.640 (16.26) x 0.640 (16.26)
76°C @ 6W
55°C @ 6W
48°C @ 6W
Thermal Performance at Typical Load
Convection
65°C @ 6w
Natural
TYPICAL THERMAL PERFORMANCE
Dimensions
Footprint
in. (mm)
FOR 634-15ABP
CONVECTION CHARACTERISTICS
NATURAL AND FORCED
5.8°C/W @ 200 LFM
5.5°C/W @ 200 LFM
4.7°C/W @ 200 LFM
4.2°C/W @ 200 LFM
Convection
Forced
0.025 (11.21)
0.033 (14.95)
lbs. (grams)
0.016 (7.48
Board Level
TO-220 and TO-218
Weight
Heat Sinks
0.023 (10.43)
0.035 (15.88)
0.050 (22.68)
0.062 (28.12)
lbs. (grams)
Weight
TO-220
39