270-AB Wakefield Thermal Solutions, 270-AB Datasheet - Page 6

• 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

BOARD LEVEL POWER SEMICONDUCTOR HEAT SINKS
Material: Aluminum,
Black Anodized
MECHANICAL DIMENSIONS
Normally stocked
MECHANICAL DIMENSIONS
232-200AB
251-62AB
242 SERIES
Standard
P/N
242-125AB-22 1.285 (32.6)
Material: Aluminum, Black Anodized
232 AND 238 SERIES
Standard
P/N
232-200AB
232-200AB-23 2.000 (50.8)
238-200AB
238-200AB-23 2.000 (50.8)
251 SERIES
P/N
251-62AB
251-80AB
251-80AB-19
Material: Aluminum, Black Anodized
Standard
242-125AB-22
232-200AB-23
Height Above
Height Above
Height Above
2.000 (50.8)
2.000 (50.8)
.620 (15.7)
.845 (21.5)
.875 (22.2)
Low-Height, Low-Profile Twisted Fin Heat Sinks
Slim-Profile Heat Sinks With Integral Clips
PC Board
PC Board
PC Board
in. (mm)
in. (mm)
in. (mm)
251-80AB
MECHANICAL DIMENSIONS
Staggered Fin Heat Sinks for Vertical Mounting
1.380 (35.1) x .500 (12.7)
1.380 (35.1) x .500 (12.7)
1.380 (35.1) x .500 (12.7)
1.380 (35.1) x .500 (12.7)
.875 (22.2) x .250 (6.4)
.910 (23.1) x .380 (9.7)
.910 (23.1) x .380 (9.7)
.910 (23.1) x .380 (9.7)
238-200AB
Dimensions
Dimensions
Dimensions
Footprint
Footprint
Footprint
in. (mm)
in. (mm)
in. (mm)
Dimensions: in. (mm)
Dimensions: in. (mm)
238 SERIES
251 SERIES
35
238-200AB-23
Configuration
Configuration
Configuration
251-80AB-19
Vert./Horiz.
Vert./Horiz.
Mounting
Mounting
Mounting
Vertical
Vertical
Vertical
Verlical
Verlical
Vertical
242 SERIES
232 AND 238 SERIES
Dimensions: in. (mm)
2, Solderable
2, Solderable
Tab Options
Tab Options
Tab Options
Solderable
Solderable
Solderable
2, Twisted
2, Twisted
All other products, please contact factory for price, delivery, and minimums.
No Tab
No Tab
19
22
Clip/Mtg Hole
Clip/Mtg Hole
Mounting
Mounting
Mounting
Mtg Hole
Mtg Slot
Mtg Slot
Style
Style
Style
Clip
Clip
Clip
CONVECTION CHARACTERISTICS
CONVECTION CHARACTERISTICS
CONVECTION CHARACTERISTICS
NATURAL AND FORCED
NATURAL AND FORCED
NATURAL AND FORCED
48°C @ 4W
48°C @ 4W
48°C @ 2W
48°C @ 4W
48°C @ 4W
66°C @ 3W
64°C @ 3W
64°C @ 3W
Thermal Performance at Typical Load
Convection
Thermal Performance at Typical Load
Convection
Thermal Performance at Typical Load
Convection
Natural
Natural
Natural
66°C/W @ 400 LFM
6.2°C/W @ 400 LFM
3.3°C/W @ 400 LFM
3.3°C/W @ 400 LFM
3.3 °C/W @ 400 LFM
3.3 °C/W @ 400 LFM
66°C/W @ 400 LFM
66°C/W @ 400 LFM
Board Level
Convection
Convection
Convection
Heat Sinks
15 Lead Multiwatt
TO-202, TO-220
Forced
Forced
Forced
TO-220