270-AB Wakefield Thermal Solutions, 270-AB Datasheet - Page 11

• Manufacturer Part Number: 270-AB
• Description: HEATSINK TO-220 SM FOOTPRINT BLK
• Manufacturer: Wakefield Thermal Solutions
• Series: 270r

Specifications of 270-AB

• Thermal Resistance: 6 C / W
• Height: 0.375" (9.53mm)
• Color: Black
• Package Cooled: TO-220, TO-202
• Attachment Method: Bolt On
• Outline: 44.45mm x 17.78mm
• Power Dissipation @ Temperature Rise: 4W @ 70°C
• Thermal Resistance @ Forced Air Flow: 6.0°C/W @ 400 LFM
• Thermal Resistance @ Natural: 17.5°C/W
• Product: Heatsinks
• Mounting Style: SMD/SMT
• Heatsink Material: Aluminum
• Fin Style: Folded
• Dimensions: 28.45 mm L x 11.05 mm W x 19.05 mm H
• Designed For: TO-220, TO-202
• Packages Cooled: TO-202 / TO-220
• Width: 17.8mm
• Heat Sink Material: Aluminum
• Length: 44.5mm
• Mounting Type: Screw
• Size: 1.75L X 0.375H X 0.530W"
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 345-1041

WTS001_p26-49
BOARD LEVEL HEAT SINKS FOR TO-220, TO-218 AND M
32
Dimensions: in. (mm)
Dimensions: in. (mm)
Dimensions: in. (mm)
MECHANICAL DIMENSIONS
MECHANICAL DIMENSIONS
MECHANICAL DIMENSIONS
Board Level
Heat Sinks
6/14/07
Standard
P/N
247-195AB
247-195ABE-50 1.950 (49.5)
Order SpeedClip™ 285SC or 330SC separately. (See 248 Series section).
Material: Aluminum, Black Anodized
Standard
P/N
248-162AB
248-162ABE-50 1.620 (41.1)
Order SpeedClip™ 285SC or 330SC separately.
Material: Aluminum, Black Anodized
Standard
P/N
249-113AB
249-113ABE-50 1.130 (28.7)
Order SpeedClip™ 285SC or 330SC separately. (See 248 Series section).
Material: Aluminum, Black Anodized
247 SERIES
249 SERIES
248 SERIES
10:55 AM
Height Above
Height Above
Height Above
1.950 (49.5)
1.620 (41.1)
1.130 (28.7)
PC Board
PC Board
PC Board
in. (mm)
in. (mm)
in. (mm)
Page 32
Medium Height, Deep Profile Wavesolderable Folded Fin Heat Sinks
Low Height, Medium Profile Wavesolderable Folded Fin Heat Sinks
Medium Height, Deep Profile Wavesolderable Folded Fin Heat Sinks
1.900 (48.3) x .950 (24.1)
1.900 (48.3) x .950 (24.1)
2.000 (50.8) x .750 (19.1)
2.000 (50.8) x .750 (19.1)
1.900 (48.3) x .950 (24.1)
1.900 (48.3) x .950 (24.1)
Dimensions
Dimensions
Dimensions
Footprint
Footprint
Footprint
in. (mm)
in. (mm)
in. (mm)
Configuration
Configuration
Configuration
Vert./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
Convection
Convection
35°C @ 4W
35°C @ 4W
Convection
25°C@ 4W
25°C@ 4W
35°C@ 4W
35°C@ 4W
Order SpeedClips™ separately for use
with Series 246, 247, 248 or 249
Natural
Natural
Natural
™ COMPONENTS
3.29°C/W @ 400 LFM
3.29°C/W @ 400 LFM
2.4°C/W @ 400 LFM
2.4°C/W @ 400 LFM
2.5°C/W @ 400 LFM
2.5°C/W @ 400 LFM
Convection
Convection
Convection
Forced
Forced
Forced
MULTIWATT
MULTIWATT
MULTIWATT
.0330 (15.10)
.0340 (15.60)
lbs. (grams)
lbs. (grams)
lbs. (grams)
.026 (11.60)
.027 (12.20)
.020 (8.90)
.021 (9.40)
Weight
Weight
Weight