274-2AB Wakefield Thermal Solutions, 274-2AB Datasheet - Page 2

• Manufacturer Part Number: 274-2AB
• Description: HEATSINK LOW HEIGHT BLK TO-220
• Manufacturer: Wakefield Thermal Solutions
• Series: 274r

Specifications of 274-2AB

• Thermal Resistance: 7 C / W
• Height: 0.500" (12.70mm)
• Color: Black
• Package Cooled: TO-220
• Attachment Method: Bolt On
• Outline: 19.05mm x 12.70mm
• Power Dissipation @ Temperature Rise: 2W @ 50°C
• Thermal Resistance @ Forced Air Flow: 7.0°C/W @ 400 LFM
• Thermal Resistance @ Natural: 25°C/W
• Product: Heatsinks
• Mounting Style: SMD/SMT
• Heatsink Material: Aluminum
• Fin Style: Folded
• Dimensions: 19.05 mm L x 12.7 mm W x 13.46 mm H
• Designed For: TO-220
• Packages Cooled: TO-220
• Width: 46mm
• Heat Sink Material: Aluminum
• Length: 13.2mm
• Size: 0.75L X 0.500H X 0.520W"
• 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: 2742AB; 345-1087

WTS001_p1-25
BOARD LEVEL POWER SEMICONDUCTOR HEAT SINKS
217 SERIES
MECHANICAL DIMENSIONS
Dimensions: in.
217 SERIES
TUBE: 16.25 Inches Long,
20 Pieces per Tube
6/14/07
MECHANICAL DIMENSIONS
Min. ESD Material with Nail
Stops
TUBE DETAILS
217-36CTT6
10:54 AM
218-40CT3
Surface Mount Heat Sinks
Standard
P/N
218-40CTE3
218-40CTE5
Material: Copper, Matte Tin Plated
218 SERIES
Page 23
REF: JEDEC TO-263 (DD PAK)
REF: JEDEC MO-169 (DD PAK)
Surface Mount Heat Sink
BOARD LAYOUT RECOMMENDATIONS
Height Above
PC Board
.40 (10.2)
.40 (10.2)
in. (mm)
218-40CT5
1.03 (26.2) x .50 (12.7)
.90 (22.9) x .315 (8.0)
Maximum
Footprint
in. (mm)
SOL 20
100
80
60
40
20
0
Solid line = 218-40CT5
0
0
200
200
CONVECTION CHARACTERISTICS
0.5
Natural Convection
62°C rise @ 2W
62°C rise @ 2W
HEAT DISSIPATED (WATTS)
NATURAL AND FORCED
AIR VELOCITY (LFM)
400
400
1.0
Thermal Performance at Typical Load
Dashed Line = 218-40CT3
600
600
1.5
800
800
2.0
217-36CT6
D
1000
1000
2.5
2
PAK, TO-220, SOL-20
Board Level
21°C/W @ 200LFM
21°C/W @ 200LFM
Forced Convection
25
20
15
10
5
0
Heat Sinks
SMT Devices
23