270-AB Wakefield Thermal Solutions, 270-AB Datasheet - Page 18

• 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
MECHANICAL DIMENSIONS
MECHANICAL DIMENSIONS
MECHANICAL DIMENSIONS
Normally stocked
Dimensions: in. (mm)
Dimensions: in. (mm)
Dimensions: in. (mm)
657 SERIES
Standard
P/N
657-10ABPN
657-15ABPN
657-20ABPN
657-25ABPN
Wave-solderable pins. Material: Aluminum, Black Anodized
657 SERIES
Standard
P/N
657-10ABPSC
657-15ABPSC
657-20ABPSC
657-25ABPSC
Wave-solderable pins. Material: Aluminum, Black Anodized
677 SERIES
Standard
P/N
677-10ABP
677-15ABP
677-20ABP
677-25ABP
Wave-solderable pins. Material: Aluminum, Black Anodized
High-Performance Notched Heat Sinks for Vertical Board Mounting
High-Performance Heat Sinks with SpeedClips™ for Vertical Board Mounting
High-Performance, High-Power Heat Sinks for Vertical Board Mounting
(EXTRUSION PROFILE 8719)
657 SERIES
677 SERIES
677 SERIES
PC Board “A”
PC Board “A”
PC Board “A”
Height Above
Height Above
Height Above
1.000 (25.4)
1.500 (38.1)
2.000 (50.8)
2.500 (63.5)
1.000 (25.4)
1.500 (38.1)
2.000 (50.8)
2.500 (63.5)
1.000 (25.4)
1.500 (38.1)
2.000 (50.8)
2.500 (63.5)
in. (mm)
in. (mm)
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)
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)
47
(EXTRUSION PROFILE 6533)
Maximum
Maximum
Maximum
Footprint
in. (mm)
Footprint
in. (mm)
Footprint
in. (mm)
(EXTRUSION PROFILE 6533)
657 SERIES
657 SERIES
657 SERIES
All other products, please contact factory for price, delivery, and minimums.
41°C @ 6W
38°C @ 6W
32°C @ 6W
25°C @ 6W
Convection
41°C @ 6W
38°C @ 6W
32°C @ 6W
25°C @ 6W
Convection
52°C @ 6W
46°C @ 6W
40°C @ 6W
35°C @ 6W
Convection
Natural
Natural
Natural
Thermal Performance at Typical Load
CONVECTION CHARACTERISTICS
Thermal Performance at Typical Load
Thermal Performance at Typical Load
CONVECTION CHARACTERISTICS
CONVECTION CHARACTERISTICS
NATURAL AND FORCED
NATURAL AND FORCED
NATURAL AND FORCED
TO-218, TO-220, TO-247
15-LEAD Multiwatt
TO-220, TO-247, TO-218
TO-220, TO-247, TO-218
3.7°C/W @ 200 LFM
3.3°C/W @ 200 LFM
2.9°C/W @ 200 LFM
2.7°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
3.1°C/W @ 200 LFM
2.8°C/W @ 200 LFM
2.5°C/W @ 200 LFM
2.2°C/W @ 200 LFM
Board Level
Convection
Convection
Convection
Heat Sinks
Forced
Forced
Forced