273-AB Wakefield Thermal Solutions, 273-AB Datasheet - Page 7
![HEATSINK TO-220 LOW HEIGHT BLK](/photos/5/88/58838/273-ab_sml.jpg)
273-AB
Manufacturer Part Number
273-AB
Description
HEATSINK TO-220 LOW HEIGHT BLK
Manufacturer
Wakefield Thermal Solutions
Series
273r
Specifications of 273-AB
Thermal Resistance
7.2 C / W
Height
0.375" (9.53mm)
Color
Black
Package Cooled
TO-220, TO-218
Attachment Method
Bolt On and PC Pin
Outline
19.05mm x 19.05mm
Power Dissipation @ Temperature Rise
2W @ 49°C
Thermal Resistance @ Forced Air Flow
7.2°C/W @ 400 LFM
Thermal Resistance @ Natural
24.5°C/W
Product
Heatsinks
Mounting Style
SMD/SMT
Heatsink Material
Aluminum
Fin Style
Folded
Dimensions
19.05 mm L x 9.53 mm W x 19.05 mm H
Designed For
TO-218, TO-220
Packages Cooled
TO-218 / TO-220
Width
19.1mm
Heat Sink Material
Aluminum
Length
19.1mm
Mounting Type
Screw
Size
0.75L X 0.375H X 0.750W"
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
345-1022
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
273-AB
Manufacturer:
WAK
Quantity:
14 891
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