TO-218, TO-220, TO-247 Heat Sinks

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Mfr Part #
Quantity Available
Price
Series
Package
Product Status
Type
Package Cooled
Attachment Method
Shape
Length
Width
Diameter
Fin Height
Power Dissipation @ Temperature Rise
Thermal Resistance @ Forced Air Flow
Thermal Resistance @ Natural
Material
Material Finish
657-20ABP
657-20ABEP
HEATSINK TO-220 W/PINS BLK 2"
Wakefield Thermal Solutions
4,778
In Stock
1 : £1.80000
Bulk
Bulk
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
1.000" (25.40mm)
1.650" (41.91mm)
-
2.000" (50.80mm)
6.0W @ 32°C
2.90°C/W @ 200 LFM
5.30°C/W
Aluminum
Black Anodized
FA-T220-25E
FA-T220-25E
HEATSINK TO-218,TO-220,TO-247
Ohmite
13,248
In Stock
1 : £2.26000
Box
Box
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
1.000" (25.40mm)
1.638" (41.60mm)
-
0.984" (25.00mm)
4.0W @ 30°C
3.00°C/W @ 400 LFM
4.70°C/W
Aluminum
Black Anodized
RA-T2X-25E
RA-T2X-25E
HEATSINK TO-218,TO-220,TO-247
Ohmite
7,798
In Stock
1 : £2.33000
Box
Box
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
2.500" (63.50mm)
1.654" (42.00mm)
-
0.985" (25.00mm)
2.0W @ 20°C
1.50°C/W @ 200 LFM
4.80°C/W
Aluminum
Black Anodized
FA-T220-38E
FA-T220-38E
HEATSINK TO-218,TO-220,TO-247
Ohmite
13,388
In Stock
1 : £2.52000
Box
Box
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
1.500" (38.10mm)
1.638" (41.60mm)
-
0.984" (25.00mm)
10.0W @ 50°C
1.50°C/W @ 600 LFM
3.80°C/W
Aluminum
Black Anodized
FA-T220-51E
FA-T220-51E
HEATSINK TO-218,TO-220,TO-247
Ohmite
2,656
In Stock
1 : £3.00000
Box
Box
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
2.000" (50.80mm)
1.638" (41.60mm)
-
0.984" (25.00mm)
4.0W @ 20°C
2.00°C/W @ 300 LFM
3.40°C/W
Aluminum
Black Anodized
RA-T2X-51E
RA-T2X-51E
HEATSINK TO-218,TO-220,TO-247
Ohmite
2,689
In Stock
1 : £3.34000
Box
Box
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
2.500" (63.50mm)
1.654" (42.00mm)
-
0.985" (25.00mm)
8.0W @ 40°C
1.00°C/W @ 300 LFM
3.50°C/W
Aluminum
Black Anodized
RA-T2X-64E
RA-T2X-64E
HEATSINK TO-218,TO-220,TO-247
Ohmite
1,926
In Stock
1 : £3.93000
Box
Box
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
2.500" (63.50mm)
1.654" (42.00mm)
-
0.985" (25.00mm)
4.0W @ 20°C
1.00°C/W @ 200 LFM
3.10°C/W
Aluminum
Black Anodized
657-10ABPNE
657-10ABPNE
HEATSINK TO-220 W/PINS BLK 1"
Wakefield Thermal Solutions
2,638
In Stock
1 : £1.67000
Bulk
Bulk
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
1.000" (25.40mm)
1.650" (41.91mm)
-
1.000" (25.40mm)
6.0W @ 41°C
3.70°C/W @ 200 LFM
-
Aluminum
Black Anodized
657-15ABPE
657-15ABPE
HEATSINK TO-220 W/PINS BLK 1.5"
Wakefield Thermal Solutions
2,070
In Stock
1 : £1.80000
Bulk
Bulk
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
1.000" (25.40mm)
1.650" (41.91mm)
-
1.500" (38.10mm)
6.0W @ 38°C
3.30°C/W @ 200 LFM
6.30°C/W
Aluminum
Black Anodized
657-10ABPE
657-10ABPE
HEATSINK TO-220 W/PINS BLK 1"
Wakefield Thermal Solutions
2,202
In Stock
1 : £1.83000
Bulk
Bulk
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
1.000" (25.40mm)
1.650" (41.91mm)
-
1.000" (25.40mm)
6.0W @ 41°C
3.70°C/W @ 200 LFM
-
Aluminum
Black Anodized
657-25ABPE
657-25ABPE
HEATSINK TO-220 W/PINS BLK 2.5"
Wakefield Thermal Solutions
1,709
In Stock
1 : £2.21000
Bulk
Bulk
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
1.000" (25.40mm)
1.650" (41.91mm)
-
2.500" (63.50mm)
6.0W @ 25°C
2.70°C/W @ 200 LFM
-
Aluminum
Black Anodized
657-25ABPNE
657-25ABPNE
HEATSINK TO-220 W/PINS BLK 2.5"
Wakefield Thermal Solutions
866
In Stock
1 : £2.59000
Bulk
Bulk
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
1.000" (25.40mm)
1.650" (41.91mm)
-
2.500" (63.50mm)
6.0W @ 25°C
2.70°C/W @ 200 LFM
-
Aluminum
Black Anodized
ATS-PCB1052
ATS-PCB1052
HEATSINK TO-220/TO-218/TO-247
Advanced Thermal Solutions Inc.
758
In Stock
1 : £4.54000
Bulk
-
Bulk
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Clip and Board Mounts
Rectangular, Angled Fins
1.750" (44.45mm)
0.500" (12.70mm)
-
1.750" (44.45mm)
-
2.30°C/W @ 200 LFM
6.30°C/W
Aluminum
Black Anodized
657-20ABPNE
657-20ABPNE
HEATSINK TO-220 W/PINS BLK 2"
Wakefield Thermal Solutions
588
In Stock
1 : £2.65000
Bulk
Bulk
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
1.000" (25.40mm)
1.650" (41.91mm)
-
2.000" (50.80mm)
6.0W @ 32°C
2.90°C/W @ 200 LFM
-
Aluminum
Black Anodized
657-15ABPN,657-15ABP
657-15ABPEN
HEATSINK TO-220 W/PINS BLK 1.5"
Wakefield Thermal Solutions
0
In Stock
Check Lead Time
1 : £1.32000
Bulk
Bulk
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
1.000" (25.40mm)
1.650" (41.91mm)
-
1.500" (38.10mm)
6.0W @ 38°C
3.30°C/W @ 200 LFM
-
Aluminum
Black Anodized
7
In Stock
1 : £1.79000
Bulk
Bulk
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
0.500" (12.70mm)
1.375" (34.93mm)
-
1.500" (38.10mm)
6.0W @ 65°C
5.50°C/W @ 200 LFM
-
Aluminum
Black Anodized
HSE17-252525P
HSE17-252525P
HEAT SINK, EXTRUSION, TO-218, TO
Same Sky (Formerly CUI Devices)
0
In Stock
Check Lead Time
1 : £1.18000
Box
Box
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Angled Fins
1.000" (25.40mm)
1.638" (41.60mm)
-
0.984" (25.00mm)
6.5W @ 75°C
4.30°C/W @ 200 LFM
11.53°C/W
Aluminum Alloy
Black Anodized
0
In Stock
Check Lead Time
1 : £2.10000
Bulk
Bulk
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
0.500" (12.70mm)
1.375" (34.93mm)
-
2.000" (50.80mm)
6.0W @ 55°C
4.70°C/W @ 200 LFM
-
Aluminum
Black Anodized
0
In Stock
Check Lead Time
8,000 : £0.40424
Bulk
-
Bulk
Active
Board Level
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
1.248" (31.70mm)
0.700" (17.80mm)
-
0.402" (10.21mm)
1.0W @ 30°C
20.00°C/W @ 100 LFM
24.00°C/W
Aluminum
Black Anodized
HEATSINK STAMP 12.7X34.9X50.8MM
411320B02500
HEATSINK STAMP 12.7X34.9X50.8MM
Comair Rotron
0
In Stock
400 : £0.58353
Bulk
-
Bulk
Obsolete
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
2.000" (50.80mm)
1.375" (34.93mm)
-
0.500" (12.70mm)
2.0W @ 20°C
4.50°C/W @ 200 LFM
-
Aluminum
Black Anodized
HTSK-AL-000SW-50-B-PINS-PIERCE
SW50-4G
HTSK-AL-000SW-50-B-PINS-PIERCE
Boyd Laconia, LLC
0
In Stock
Check Lead Time
45,006 : £0.63537
Bulk
-
Bulk
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
1.358" (34.49mm)
0.492" (12.50mm)
-
1.969" (50.00mm)
2.0W @ 30°C
4°C/W @ 200 LFM
8.80°C/W
Aluminum
Black Anodized
411615B02500
411615B02500
HEATSINK EXTRUDED 25X41.6X38.1MM
Comair Rotron
0
In Stock
300 : £0.72640
Bulk
-
Bulk
Obsolete
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
1.500" (38.10mm)
1.650" (41.91mm)
-
1.000" (25.40mm)
10.0W @ 50°C
1.50°C/W @ 700 LFM
-
Aluminum
Black Anodized
THM,ZA3286 REV 6 SW50-2G
SW50-2G
THM,ZA3286 REV 6 SW50-2G
Boyd Laconia, LLC
0
In Stock
Check Lead Time
5,000 : £0.83001
Bulk
-
Bulk
Active
Board Level
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
1.358" (34.49mm)
0.492" (12.50mm)
-
1.968" (49.99mm)
3.0W @ 40°C
5.00°C/W @ 100 LFM
8.80°C/W
Aluminum
Black Anodized
HEATSINK EXTRUDED 25X41.6X50.8MM
411621B02500
HEATSINK EXTRUDED 25X41.6X50.8MM
Comair Rotron
0
In Stock
300 : £0.90503
Bulk
-
Bulk
Obsolete
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
2.000" (50.80mm)
1.638" (41.60mm)
-
0.984" (25.00mm)
6.0W @ 30°C
1.50°C/W @ 500 LFM
-
Aluminum
Black Anodized
0
In Stock
Check Lead Time
1,400 : £1.01711
Bulk
Bulk
Active
Board Level, Vertical
TO-218, TO-220, TO-247
Bolt On and PC Pin
Rectangular, Fins
0.500" (12.70mm)
1.375" (34.93mm)
-
1.000" (25.40mm)
6.0W @ 76°C
5.80°C/W @ 200 LFM
-
Aluminum
Black Anodized
Showing
of 56

Heat Sinks

Heat sinks are thermal management components designed to dissipate heat from high-power electronic devices and prevent overheating. Their core function is based on the principles of conduction, and convection, transferring heat from a heat source—such as a CPU, power transistor, or BGA package—to the surrounding air or a coolant. By increasing the surface area in contact with cooling media, heat sinks help maintain safe temperature levels and protect component reliability and performance.

Most heat sinks are made of aluminum or copper, materials known for their high thermal conductivity. Aluminum heat sinks are lightweight and cost-effective, ideal for general-purpose cooling solutions, while copper heat sinks offer better conductivity for high-performance or space-constrained applications. Finned and extrusion-style heat sinks use strategically shaped surfaces to maximize exposure to air, enhancing natural or forced convection. Cross-cut designs further improve airflow and thermal dispersion. In advanced applications, heat pipes, liquid cooling, or graphite spreaders may be used to rapidly move heat away from the source. For compact or passive systems, passive heat exchangers rely entirely on natural airflow without the use of fans.

Proper thermal contact between the heat sink and device is critical—thermal interface materials (TIMs) such as thermal paste, pads, or solder are used to fill microscopic gaps and reduce thermal resistance. When selecting a heat sink, consider the thermal output of the component, available space, airflow conditions, and the thermal resistance of the system.