274-1AB Wakefield Thermal Solutions, 274-1AB Datasheet - Page 20
![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
Wave-solderable pins on 1 in. centers for vertical mounting of larger devices on printed
circuit boards. Maximum semiconductor package width: 0.625 (15.9). Refer to the Accessory
Dimensions: in. (mm)
MECHANICAL DIMENSIONS
MECHANICAL DIMENSIONS
Dimensions: in. (mm)
6/14/07
10:56 AM
Standard
P/N
647-1OABEP
647-15ABEP
647-175ABEP
647-20ABEP
647-25ABEP
Material: Aluminum, Black Anodized
Standard
P/N
657-10ABEP
657-15ABEP
657-20ABEP
657-25ABEP
Wave-solderable pins. Material: Aluminum, Black Anodized
657 SERIES
647 SERIES
Page 41
Height Above
PC Board “A”
1.000 (25.4)
1.500 (38.1)
2.000 (50.8)
2.500 (63.5)
in. (mm)
PC Board “A”
High-Performance Heat Sinks for Vertical Board Mounting
High-Performance Heat Sinks for Vertical Board Mounting
1.000 (25.4)
1.500 (38.1)
1.750 (44.5)
2.000 (50.8)
2.500 (63.5)
Height Above
in. (mm)
1.650 (41.9) x 1.000 (25.4)
1.650 (41.9) x 1.000 (25.4)
1.650 (41.9) x 1.000 (25.4)
1.650 (41.9) x 1.000 (25.4)
1.650 (41.9) x 1.000 (25.4)
1.650 (41.9) x 1.000 (25.4)
1.650 (41.9) x 1.000 (25.4)
1.650 (41.9) x 1.000 (25.4)
1.650 (41.9) x 1.000 (25.4)
Maximum Footprint
Maximum
Footprint
in. (mm)
(EXTRUSION PROFILE 5195)
in. (mm)
657 SERIES
(EXTRUSION PROFILE 6533)
657 SERIES
647 SERIES
Products section for thermal interface materials, 126 Series silicone-free thermal compounds,
and other accessories products.
Convection
41°C @ 6W
38°C @ 6W
32°C @ 6W
25°C @ 6W
Thermal Performance at Typical Load
Natural
42°C @ 6W
37°C @ 6W
34°C @ 6W
31°C @ 6W
25°C @ 6W
Thermal Performance at Typical Load
Convection
Natural
CONVECTION CHARACTERISTICS
CONVECTION CHARACTERISTICS
NATURAL AND FORCED
3.8°C/W @ 200 LFM
3.5°C/W @ 200 LFM
3.3°C/W @ 200 LFM
3.1°C/W @ 200 LFM
2.8°C/W @ 200 LFM
3.7°C/W @ 200 LFM
3.3°C/W @ 200 LFM
2.9°C/W @ 200 LFM
2.7°C/W @ 200 LFM
NATURAL AND FORCED
Convection
Convection
Forced
Forced
TO-220, TO-247, TO-218
Board Level
Heat Sinks
0.055 (24.95)
0.075 (34.02)
0.090 (40.82)
0.104 (47.17)
0.125 (56.70)
lbs. (grams)
0.0515 (23.36)
0.0760 (34.60)
0.1030 (47.00)
0.1250 (57.00)
lbs (grams)
Weight
TO-220
Weight
41