274-1AB Wakefield Thermal Solutions, 274-1AB Datasheet - Page 8

• Manufacturer Part Number: 274-1AB
• Description: HEATSINK TO-220 LOW HEIGHT BLK
• Manufacturer: Wakefield Thermal Solutions
• Series: 274r

Specifications of 274-1AB

• Thermal Resistance: 8 C / W
• Height: 0.375" (9.53mm)
• Color: Black
• Package Cooled: TO-220
• Attachment Method: Bolt On and PC Pin
• Outline: 19.05mm x 13.21mm
• Power Dissipation @ Temperature Rise: 2W @ 56°C
• Thermal Resistance @ Forced Air Flow: 8.0°C/W @ 400 LFM
• Thermal Resistance @ Natural: 28°C/W
• Product: Heatsinks
• Mounting Style: SMD/SMT
• Heatsink Material: Aluminum
• Fin Style: Folded
• Dimensions: 13.21 mm L x 9.53 mm W x 19.05 mm H
• Designed For: TO-220
• Packages Cooled: TO-220
• Width: 19.1mm
• Heat Sink Material: Aluminum
• Length: 13.2mm
• Mounting Type: Screw
• Package / Case: TO-220
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 345-1023

BOARD LEVEL HEAT SINKS FOR TO-220, TO-218 AND M
Dimensions: in. (mm)
Dimensions: in. (mm)
Dimensions: in. (mm)
MECHANICAL DIMENSIONS
MECHANICAL DIMENSIONS
MECHANICAL DIMENSIONS
Normally stocked
247 SERIES
Standard
P/N
247-195AB
247-195AB-50
Order SpeedClip™ 285SC or 330SC separately. (See 248 Series section).
Material: Aluminum, Black Anodized
248 SERIES
Standard
P/N
248-162AB
248-162AB-50
Order SpeedClip™ 285SC or 330SC separately.
Material: Aluminum, Black Anodized
249 SERIES
Standard
P/N
249-113AB
249-113AB-50
Order SpeedClip™ 285SC or 330SC separately. (See 248 Series section).
Material: Aluminum, Black Anodized
Height Above
Height Above
Height Above
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
1.950 (49.5)
1.950 (49.5)
1.620 (41.1)
1.620 (41.1)
1.130 (28.7)
1.130 (28.7)
PC Board
PC Board
PC Board
in. (mm)
in. (mm)
in. (mm)
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)
37
Configuration
Configuration
Configuration
Vert./Horiz.
Vert./Horiz,
Vert/Horiz.
Mounting
Mounting
Mounting
Vertical
Vertical
Vertical
Tab Options
Tab Options
Tab Options
Solderable
Solderable
Solderable
All other products, please contact factory for price, delivery, and minimums.
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™ separatley 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
Board Level
Heat Sinks
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