637-20ABP Wakefield Thermal Solutions, 637-20ABP Datasheet - Page 7

• Manufacturer Part Number: 637-20ABP
• Description: HEATSINK TO-220 VERT MT BLK 2"
• Manufacturer: Wakefield Thermal Solutions
• Series: 637r

Specifications of 637-20ABP

• Thermal Resistance: 4.7 C / W
• Height: 2.000" (50.8mm)
• Color: Black
• Package Cooled: TO-220
• Attachment Method: Bolt On and PC Pin
• Outline: 34.92mm x 12.70mm
• Power Dissipation @ Temperature Rise: 6W @ 55°C
• Thermal Resistance @ Forced Air Flow: 4.7°C/W @ 200 LFM
• Thermal Resistance @ Natural: 9.2°C/W
• Product: Heatsinks
• Mounting Style: Through Hole
• Heatsink Material: Aluminum
• Fin Style: Folded
• Dimensions: 12.7 mm L x 35.05 mm W x 50.8 mm H
• Designed For: TO-220
• Packages Cooled: TO-220
• Width: 34.9mm
• Heat Sink Material: Aluminum
• Length: 12.7mm
• Mounting Type: PC Board Through Hole
• Peak Reflow Compatible (260 C): No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant, Contains lead / RoHS non-compliant
• Other names: 345-1030

BOARD LEVEL HEAT SINKS FOR TO-220, TO-218 AND M
All other products, please contact factory for price, delivery, and minimums.
Board Level
Heat Sinks
Dimensions: in. (mm)
MECHANICAL DIMENSIONS
MECHANICAL DIMENSIONS
Dimensions: in. (mm)
MECHANICAL DIMENSIONS
Dimensions: in. (mm)
244 SERIES
Standard
P/N
244-145AB
244-145AB-50
Material: Aluminum, Black Anodized
245 SERIES
Standard
P/N
245-145AB
245-145AB-50
Material: Aluminum, Black Anodized
246 SERIES
Standard
P/N
246-197AB
246-197AB-50
Order SpeedClip™ 285SC or 330SC separately. (See 248 Series section).
Material: Aluminum, Black Anodized
Height Above
Height Above
Height Above
1.450 (36.8)
1.650 (41.9)
1.450 (36.8)
1.968 (50.0)
2.168 (55.1)
1.650 (41.9)
PC Board
PC Board
PC Board
in. (mm)
in. (mm)
in. (mm)
Low Height, Slim Profile Wavesolderable Folded Fin Heat Sinks
Low Height, Slim Profile Wavesolderable Folded Fin Heat Sinks
Medium Height, Slim Profile Wavesolderable Folded Fin Heat Sinks
1.300 (33.0) x 480 (12.1)
1.300 (33.0) x 480 (12.1)
1.750 (44.5) x .380 (9.7)
1.750 (44.5) x .380 (9.7)
1.986 (50.4) x 3.75 (9.5)
1.986 (50.4) x 3.75 (9.5)
Dimensions
Dimensions
Dimensions
Footprint
Footprint
Footprint
in. (mm)
in. (mm)
in. (mm)
36
Configuration
Configuration
Configuration
Ver.t/Horiz.
Vert./Horiz.
Vert/Horiz,
Mounting
Mounting
Mounting
Vertical
Vertical
Vertical
Tab Options
Tab Options
Tab Options
Solderable
Solderable
Solderable
No Tab
No Tab
No Tab
50
50
50
ULTIWATT
Thermal Performance at Typical Load
Thermal Performance at Typical Load
Thermal Performance at Typical Load
38°C @ 4W
Convection
44°C @ 4W
44°C @ 4W
38°C @ 4W
35°C @ 4W
35°C @ 4W
Convection
Convection
Natural
Natural
Natural
™ COMPONENTS
4.4°C/W @ 400 LFM
4.4°C/W @ 400 LFM
3.2°C/W @ 400 LFM
3.2°C/W @ 400 LFM
2.8°C/W @ 400 LFM
2.8°C/W @ 400 LFM
Convection
Convection
Convection
Forced
Forced
Forced
Normally stocked
MULTIWATT
MULTIWATT
MULTIWATT
.0240 (10.90)
.0250 (11.40)
lbs. (grams)
lbs. (grams)
.0160 (7.25)
lbs. (grams)
.0160 (7.25)
.0170 (7.20)
.0170 (7.20)
Weight
Weight
Weight