274-1AB Wakefield Thermal Solutions, 274-1AB Datasheet - Page 14
![HEATSINK TO-220 LOW HEIGHT BLK](/photos/5/88/58821/274-1ab_sml.jpg)
274-1AB
Manufacturer Part Number
274-1AB
Description
HEATSINK TO-220 LOW HEIGHT BLK
Manufacturer
Wakefield Thermal Solutions
Series
274r
Specifications of 274-1AB
Thermal Resistance
8 C / W
Height
0.375" (9.53mm)
Color
Black
Package Cooled
TO-220
Attachment Method
Bolt On and PC Pin
Outline
19.05mm x 13.21mm
Power Dissipation @ Temperature Rise
2W @ 56°C
Thermal Resistance @ Forced Air Flow
8.0°C/W @ 400 LFM
Thermal Resistance @ Natural
28°C/W
Product
Heatsinks
Mounting Style
SMD/SMT
Heatsink Material
Aluminum
Fin Style
Folded
Dimensions
13.21 mm L x 9.53 mm W x 19.05 mm H
Designed For
TO-220
Packages Cooled
TO-220
Width
19.1mm
Heat Sink Material
Aluminum
Length
13.2mm
Mounting Type
Screw
Package / Case
TO-220
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
345-1023
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
274-1AB
Manufacturer:
WAK
Quantity:
13 432
WTS001_p26-49
BOARD LEVEL POWER SEMICONDUCTOR HEAT SINKS
MECHANICAL DIMENSIONS
MECHANICAL DIMENSIONS
MECHANICAL DIMENSIONS
Dimensions: in. (mm)
Dimensions: in. (mm)
6/14/07
237 AND 252 SERIES
250-122AB
10:55 AM
Standard
P/N
250-122AB
250-122ABE-09
250-122ABE-25
Material: Aluminum, Black Anodized
Standard
P/N
237-167AB2
237-167AB3
237-167ABE2-24 1.675 (42.5)
252-167AB2
252-167AB3
252-167ABE2-24 1.675 (42.5)
Order SpeedClips™ 285SC or 330SC separately for rapid component installation, lowering manufacturing costs. Material: Aluminum, Black Anodized
Standard
P/N
291-C236AB
291-H36AB
Material: Aluminum, Black Anodized
Designed for mounting horizontally or vertically on a circuit board, 291 Series
heat sinks employ a unique clip for attachment of TO-220 case styles.
250 SERIES
291 SERIES
237 & 252 SERIES
237-167AB3
252-167AB3
227-167
Page 35
Height Above
1.675 (42.5)
1.675 (42.5)
1.675 (42.5)
1.675 (42.5)
Dimensions: in. (mm)
Height Above
1.220 (31.0)
1.220 (31.0)
1.380 (35.1)
PC Board
in. (mm)
Height Above
0.860 (21.)9
0.860 (21.9)
237-167AB3
PC Board
in. (mm)
PC Board
in. (mm)
237 AND 252 SERIES
High-Performance Slim Profile Heat Sinks With Integral Clips
Labor-Saving Clip-on Heat Sinks
291-C2
High-Performance, High-Power Vertical Mount Heat Sinks
1.000 (25-4) x 1.000 (25.4)
1.000 (25.4) x 1.000 (25.4)
1.000 (25.4) x 1.000 (25.4)
1.000 (25.4) x 1.000 (25.4)
1.000 (25.4) x 1.000 (25.4)
1.000 (25.4) x 1.000 (25.4)
252-167
1.000 (25.4) x .500 (12.7)
1.000 (25.4) x .500 (12.7)
1.000 (25.4) x .500 (12.7)
1.100 (27.0) x 0.360 (9.1)
1.100 (27.0) x 0.360 (9.1)
Mounting Footprint
Dimensions
Dimensions
Footprint
Footprint
in. (mm)
in. (mm)
250 SERIES
252-167AB3
Dimensions
in. (mm)
Vertical
291 SERIES
237-167AB2
252-167AB2
291-H
250-122AB-09
Configuration
Configuration
Vert./Horiz.
237-167AB2-24
252-167AB2-24
Mounting
Mounting
TO-220 (Mtg. Hole)
Vertical
Vertical
Vertical
Vertical
Vertical
Vertical
Vertical
Vertical
TO-220 (Clip)
Mounting
Style
One type is available with a locking clip and one with a 0.140 in. (3.6) diameter
mounting hole only.
2, Solderable
2, Solderable
Tab Options
Tab Options
Solderable
Solderable
2, Twisted
3, Twisted
2, Twisted
3, Twisted
No Tab
09
25
250-122AB-25
Thermal Performance at Typical Load
80°C @ 2W
68°C @ 2W
Convection
Natural
Clip/Mtg Slot
Clip/Mtg Slot
Clip/Mtg Slot
Clip/Mtg Slot
Clip/Mtg Slot
Clip/Mtg Slot
Mounting
Mounting
CONVECTION CHARACTERISTICS
Style
Style
Clip
Clip
Clip
NATURAL AND FORCED
CONVECTION CHARACTERISTICS
CONVECTION CHARACTERISTICS
24°C/W @ 600 LFM
16°C/W @ 600 LFM
Thermal Performance at Typical Load
Thermal Performance at Typical Load
NATURAL AND FORCED
46°C @ 4W
46°C @ 4W
46°C @ 4W
40°C @ 4W
40°C @ 4W
40°C @ 4W
NATURAL AND FORCED
Convection
50°C @ 4W
50°C @ 4W
50°C @ 4W
Convection
Convection
Natural
Natural
Forced
3.7°C/W @ 400 LFM
3.7°C/W @ 400 LFM
3.7°C/W @ 400 LFM
4.5°C/W @ 200 LFM
4.5°C/W @ 200 LFM
4.5°C/W @ 200 LFM
4.5°C/W @ 200 LFM
4.5°C/W @ 200 LFM
4.5°C/W @ 200 LFM
Board Level
Heat Sinks
Convection
Convection
Forced
Forced
0.0026 (1.18))
0.0026 (1.18)
MULTIWATT
lbs. (grams)
TO-220
TO-220
Weight
35