270-AB Wakefield Thermal Solutions, 270-AB Datasheet - Page 17

• 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 POWER SEMICONDUCTOR HEAT SINKS
260 SERIES
38
MECHANICAL DIMENSIONS
Dimensions: in. (mm)
Board Level
Heat Sinks
MECHANICAL DIMENSIONS
Dimensions: in. (mm)
258 SERIES
6/14/07
Epoxy Insulated For TO-5
Power semiconductors packaged in a TO-92 style plastic case can be cooled ef-
fectively at little additional cost with the addition of the 292-AB heat sink. The
Standard
P/N
258
Standard
P/N
292-AB
The thermal resistance from diode leads to chassis or heat sink is 12°C/watt,
when unit is mounted with TYPE 120 Joint Compound. If a 10°C/watt chassis or
258 SERIES
292 SERIES
260-4T5E
10:56 AM
0.500 (12.7) x 0.250 (6.4) x 0.340 (8.6)
Height Above
Page 38
0.750 (19.1)
Heat Sink for Single TO-92
PC Board
in. (mm)
Thermal Links for Fused Glass Diodes
Dimensions
in. (mm)
0. 600 (15.3)
Fin Width
in. (mm)
260-4TH5E
Overall
Aluminum
Material
292 SERIES
Thermal Performance
0.225°C/W @ 0.250 W
Natural Convection
292-AB is effective over the typical power range of such devices.
Material: Aluminum, Black Anodized
sink to ambient impedance is available, the thermal resistance from the diode
leads to ambient is reduced from about 150°C/watt to 22°C/watt.
DeltaCoate™ 151 on all surfaces
except solder pads and base
Finish
260-6SH5E
Black Anodized
CONVECTION CHARACTERISTICS
Finish
NATURAL AND FORCED
0.0018 (0.82)
lbs. (grams)
Weight
0.00049 (0.22)
lbs. (grams)
Weight
DIODES
TO-92