274-3AB Wakefield Thermal Solutions, 274-3AB Datasheet - Page 12

• Manufacturer Part Number: 274-3AB
• Description: Heat Sink
• Manufacturer: Wakefield Thermal Solutions

Specifications of 274-3AB

• Packages Cooled: TO-220
• Thermal Resistance: 31°C/W
• Width: 13.2mm
• Height: 6.4mm
• Heat Sink Material: Aluminum
• Length: 19.1mm
• Mounting Type: Mounting Hole
• Package / Case: TO-220
• Color: Black
• Product: Heatsinks
• Mounting Style: Screw
• Heatsink Material: Aluminum
• Dimensions: 13.2 mm L x 19.1 mm W x 6.4 mm H
• Designed For: TO-220
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q5346208

WTS001_p26-49
BOARD LEVEL POWER SEMICONDUCTOR HEAT SINKS
MECHANICAL DIMENSIONS
Dimensions: in. (mm)
MECHANICAL DIMENSIONS
Dimensions: in. (mm)
6/14/07
10:55 AM
This top-hat style booster heat sink can be added to any of the 270, 272, or 280
Series for improved performance.
Standard
P/N
288-1ABE
Mounting tabs are pre-tinned to ensure excellent wave-solder bond and good
electrical connections for vertical mounting of TO-220 and TO-202 semiconduc-
tor packages. These heat sinks are designed for use where minimum PC board
Standard
P/N
271-AB
Material: Aluminum, Black Anodized
288 SERIES
271 SERIES
Page 33
Semiconductor Case
Height Above
0.500 (12.7)
Compact Wave-Solderable Low-Cost Heat Sinks
Top-Mount Booster Heat Sinks for Use with 270/272/280 Series
in. (mm)
Height Above
1.250 (31.8)
PC Board
in. (mm)
1.750 (44.5) x 0.700 (17.8)
288 SERIES
Mounting Footprint
271 SERIES
Dimensions
Horizontal
in. (mm)
0.875 (22.2) x 0.215 (5.5)
Maximum
Footprint
in. (mm)
31 °C @ 4W (NOTE B)
62°C @ 4W (NOTE A)
space is available. The 288-1AB is a stamped aluminum heat sink, black an-
odized, designed for applications requiring good heat dissipation from a heat
sink occupying minimum space, available at minimum cost.
NOTE A: Thermal resistance with one 271-AB. NOTE B: Thermal resistance
(total) as shown with (2) 271-AB types added to (1) 272-AB type.
Convection
Thermal Performance at Typical Load
Natural
Thermal Performance at Typical Load
85°C @ 4W
Convection
Natural
CONVECTION CHARACTERISTICS
CONVECTION CHARACTERISTICS
NATURAL AND FORCED
NATURAL AND FORCED
1.8°C/W 400 LFM (NOTE B)
5.1°C/W @ 400 LFM
12°C/W @ 200 LFM
Convection
Forced
Convection
Forced
Board Level
Heat Sinks
TO-220, TO-202
0.0057 (2.59)
0.0052 (2.36)
lbs. (grams)
lbs. (grams)
Weight
TO-220
Weight
33