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Air cooling

Heat sinks

Heat sinks are passive cooling components that dissipate heat from electronic devices or systems that generate high heat loads, such as computers, servers and industrial equipment. Main heat sink components include a base and a series of fins made from high thermal conductivity materials like aluminum or copper. By carrying heat to the surrounding air, heat sinks ensure high thermal performance and prevent system failure or damage.

Eaton extrude heat sink

How do heat sinks work?

Heat sinks transfer heat away from a device or heat source and into the surrounding environment using conduction, convection and radiation. Generated heat is conducted through a high thermal conductivity heat sink base which conducts energy into heat sink fins. Additional surface area from the heat sinks fins increases heat transfer to the surrounding air with conduction. As air passes over these heat sink fins, it absorbs the heat from the heat sink and convects it away, either through natural convection or forced convection with a fan or blower.

Integrate heat sinks with more Eaton thermal technologies

While standalone heat sinks are suitable for many applications, heat sinks integrated with fans, heat pipes or liquid cooling systems boost cooling capacity, enable customized design, streamline installation and provide comprehensive thermal management for demanding applications. Eaton’s comprehensive thermal portfolio enables us to serve our customers with a best fit solution for their applications.

Eaton two phase cooling

Advanced heat sinks and assemblies

High fin densities and more design flexibility

Improve air cooling performance with fans or advanced heat sink constructions like skiving, die casting or bonding to improve fin aspect ratio and fin density for higher heat applications. Advanced heat sinks use more complex manufacturing methods or leverage multiple processes to construct a base and fin. They also have greater design flexibility compared to standard extruded or stamped heat sinks. Advanced heat sink constructions include skived fin and die cast heat sinks and bonded or brazed fin heat sinks using zipper or folded fin stacks.

Aluminum extruded heat sinks

Cost effective air cooling

An extruded aluminum heat sink is one of the most popular and cost-efficient heat sink fabrication methods. Eaton produces a wide variety of extruded heat sink options that can be customized with various mounting methods, pre-applied thermal interface materials and other features to streamline assembly into your PCB.

Eaton aluminum extrude

Stamped heat sinks and accessories

Eaton board level

Board-level stamped cooling solutions

Stamped heat sinks are a cost-effective solution that add surface area to increase heat transfer for board level products. These heat sinks are formed through progressive punching processes, where details and features are progressively added with each stamp of sheet metal going through the punching die. Stamped heat sinks are designed for specific electronic package types to ensure optimized fit and function. These heat sinks come in a variety of mounting methods, including solder tabs and pins, interference fit with the device through integrated clips or slide-on features or through-hole hardware like screws and nuts. Most stamped heat sinks are available with a finish to improve heat radiation and thermal performance for natural convection applications.

Heat sink accessories

A complete thermal management solution requires not only the main method of heat transfer like a heat sink, but additional components for installation and optimal performance. Thermal accessories include items like hardware to mount the cooling solution and heat sources together, thermally conductive insulation and thermal interface materials.

Eaton wavy folded fin

Folded fin stock

Folded fin stock is manufactured in a progressive stamping process that folds sheet metals into fin stacks that increases surface area to improve cooling when used as heat transfer fins. Eaton varies heat transfer fin material, configuration, thickness and density to boost the performance of other thermal management technologies including heat exchangers, heat sinks and vacuum brazed cold plates. Our manufacturing flexibility and thermal innovation allows us to extend thermal performance of existing cooling technologies in an application, negating the need to transition to next level cooling technologies for increasing heat loads.

Eaton mountain kits

Heat sink mounting kits

Eaton’s mounting kits are pre-packaged in heat-sealed plastic bags for easy use on an assembly line. Eaton offers kits for DO-4, DO-5, TO-220, TO-3 and TO-66 device packages. Mounting kits for DO-4 and DO-5 include an insulator, bushing, washer, lock washer and hex nut. For TO-220, TO-3 and TO-66 devices, kits include 1-2 screws, insulating material, bushing, washer, lock washer and hex nut.

Popular mounting kits

 

Solder anchors

Solder anchors are wire loops used to lock down heat sinks with spring clips, such as Z-Clips, to the printed circuit board (PCB). Solder anchors are soldered directly into the PCB and enable secure mounting for rugged applications and easy maintenance rework. When used in conjunction with Z-clips, solder anchors improve thermal contact between the heat sink and device, reduce thermal interface resistance and minimize keep-out areas.

Eaton solder anchor heat sink
Eaton spring clips

Heat sink spring clips

Heat sink spring clips are an effective way to quickly mount electronic devices with TO package types to extruded heat sinks. Reduce interface resistance between the heat source and heat sink solution to improve thermal performance by utilizing Heat sink spring clips. Spring clips are designed to work in conjunction with an extruded profile’s geometry to ensure adequate mounting pressure on the device.

Card ejectors and pullers

PCB card ejectors, pullers and snap-on hardware aid safe card insertion and extraction. PCB cards, their components and connectors are less frequently damaged during extraction from PC boards when using appropriate ejector, puller and extractor hardware. Single-piece snap-on PCB ejectors and pullers reduce assembly time and complexity and are excellent for retrofit applications.

Eaton card ejectors
Eaton skived fin

Shurlock pins

Shurlock pins mount heat sinks to PCB assemblies and provide spring force to ensure good thermal contact with heat sources below. Shurlock pins lock in place when installed in a PCB through hole.

Eaton bushings

Bushings and shoulder washers

Bushings, washers and spacers electrically insulate hardware such as screws, rivets or wires, reduce vibration and can be used as a guide for materials. Insulating bushings and washers offer mechanical benefits, electrical insulation and environmental protection such as noise, vibration and harshness (NVH) and shock. They increase device structural integrity, electrical performance and reliability.

Insulating shoulder washers bear similarities to bushings and vary in geometry and materials for NVH and protection as well as electrical and thermal insulation. Often constructed of aluminum alloys, they can also be made from a range of flexible or rigid materials to suit the application.

Specifications

Popular stamped heat sinks

Part number

Length (mm)

Width (mm)

Height (mm)

Primary device types

Materials

RoHS

6000DG 6.35 25.4 25.4 Axial Lead Cu (Tin) Compliant
6021BG 12.7 25.4 29.97 TO-220* Al Compliant
6043BG 6.81 20.32 25.4 TO-220* Al Compliant
6238B-MTG 15.49 25.53 29.44 TO-220* Al Compliant
7020B-MTG 11.94 33.2 36.83 TO-220* Al Compliant
7023B-MTG 24.13 48.26 49.53 TO-220* Al Compliant
7106DG 14.99 25.91 9.52 D2 pak (TO-263), SO-10 (MO-184) Cu (Tin) Compliant
7109DG 11.43 25.4 19.38 D2 pak, TO-263 Cu (Tin) Compliant
7136DG 13.08 13.21 21.54 TO-220* Cu (Tin) Compliant
7141DG 13.08 13.21 19.8 TO-220* Cu (Tin) Compliant
507302B00000G 19.05 19.05 9.65 TO-220 Al Compliant
530614B00000G 29.97 25.4 12.7 TO-220* Al Compliant
534202B02853G 12.7 25.4 29.97 TO-220* Al Compliant
563002T00000G 12.7 25.4 29.97 TO-220** Al (Paint) Compliant
566010B03400G 12.7 25.4 30.99 Multiwatt, SIP Al Compliant
573100D00000G 8 22.86 10.16 D-Pak, TO-252 Al (Tin) Compliant
574502B03300G 9.02 21.84 19.05 TO-220 Al Compliant
574502B03700G 9.02 21.84 19.05 TO-220 Al Compliant
576802B00000G 12.7 12.7 19.05 TO-220*, TO-262 Al Compliant
576802B03100G 12.7 12.7 19.05 TO-220*, TO-262 Al Compliant
576802B04000G 12.7 12.7 19.05 TO-220*, TO-262 Al Compliant
577102B00000G 9.52 13.21 19.05 TO-220* Al Compliant
577202B00000G 12.7 13.21 19.05 TO-220* Al Compliant
592502B03400G 6.35 22.22 31.75 TO-220* Al Compliant
593002B03400G 12.7 23.93 29.97 TO-220* Al Compliant
593202B03500G 12.2 25.5 50.8 TO-220* Al Compliant
PF750G 11 22 19 TO-220* Al (Tin) Compliant

Popular mounting kits

Part number

Device types

Contents of kit

4880G TO-220 Qty 1, thermalfilm insulator
Qty 1, shoulder washer
Qty 1, flat washer #4
Qty 1, No. 4-40 UNC-2B, hex nut
Qty 1, No. 4-40 UNC-2A x 1/2 in. Long phillips pan head screw
Qty 1, Lockwasher, No.4.
4880SG TO-220 Qty 1, In-Sil-8 insulator
Qty 1, shoulder washer
Qty 1, flat washer #4
Qty 1, No. 4-40 UNC-2B, hex nut
Qty 1, No. 4-40 UNC-2A X, 1/2 in. Long phillips pan head screw
Qty 1, Lockwasher, No.4.
Part number
10-6327-01G
10-L4LB-05G
10-L4LB-11G
2227BG
2292BG
2327B-ACHG
241202B91200G
241202B92200G
241204B91200G
241204B92200G
241214B91200G
241214B92200G
241402B91200G
241402B92200G
241404B91200G
241404B92200G
241409B91200G
241409B92200G
241802B91200G
241802B92200G
241804B91200G
241804B92200G
241809B91200G
241809B92200G
242109B93000G
242109B93600G
242209B93000G
242209B93600G
242409B93000G
320105B00000G
320205B00000G
322505B00000G
322605B00000G
322805B00000G
323005B00000G
325705B00000G
326005B00000G
326005R00000G
335224B00032G
335224B00034G
335714B00000G
335714B00032G
335824B00032G
335824B00034G
364424B00032G
364424B00034G
371824B00032G
371824B00034G
371924B00000G
371924B00032G
371924B00034G
372024B00032G
372924M02000G
373324M00000G
373324M00032G
374024B00035G
374124B00035G
374124B60023G
374224B00035G
374224B60023G
374324B00032G
374324B00035G
374324B60023G
374424B00032G
374424B00035G
374424B60023G
374524B00032G
374524B60023G
374624B00032G
374624B00035G
374624B60024G
374724B00032G
374724B00035G
374724B60024G
374824B00032G
374824B00035G
374824B60024G
374924B00035G
374924B60024G
375024B00032G
375024B60024G
375124B00032G
375124B60024G
375224B00032G
375324B00035G
375424B00034G
501100B00000G
508500B00000G
508700B00000G
513001B02500G
513201B02500G
513301B02500G
529701B02100G
529701B02100G
529701B02500G
529801B02500G
529901B02100G
529901B02500G
529902B02100G
529902B02500G
530001B02100G
530001B02500G
530002B02500G
531002B00000G
531002B02100G
531102B00000G
531102B02100G
531202B00000G
531202B02100G
531202B02500G
531302B02500G
532602B02500G
532702B02500G
532802B02500G
581101B02500G
581102B02100G
6299BG
6322BG
6374BG
6380BG
6380BG
6396BG
6399BG
6400BG
6400BG
6400BG
6400BG
6400B-P2G
a10-5607-04G
BW38-2G
DIP1490
DIP1494
EA-160-H095-710
EA-160-H125-710
EA-160-H145-710
EA-160-H175-710
EA-160-H195-710
EA-160-H225-710
EA-160-H245-710
EA-170-H095-710
EA-170-H125-710
EA-170-H145-710
EA-170-H175-710
EA-170-H195-710
EA-170-H225-710
EA-170-H245-710
EA-190-H095-710
EA-190-H125-710
EA-190-H145-710
EA-190-H175-710
EA-190-H195-710
EA-190-H225-710
EA-190-H245-710
EA-210-H095-710
EA-210-H125-710
EA-210-H145-710
EA-210-H175-710
EA-210-H195-710
EA-210-H225-710
EA-210-H245-710
EA-230-H095-710
EA-230-H125-710
EA-230-H145-710
EA-230-H175-710
EA-230-H195-710
EA-230-H225-710
EA-230-H245-710
EA-250-H095-710
EA-250-H125-710
EA-250-H145-710
EA-250-H175-710
EA-250-H195-710
EA-250-H225-710
EA-250-H245-710
EA-270-H095-710
EA-270-H125-710
EA-270-H145-710
EA-270-H175-710
EA-270-H195-710
EA-270-H225-710
EA-270-H245-710
EA-290-H095-710
EA-290-H125-710
EA-290-H145-710
EA-290-H175-710
EA-290-H195-710
EA-290-H225-710
EA-290-H245-710
EA-300-H095-710
EA-300-H125-710
EA-300-H145-710
EA-300-H175-710
EA-300-H195-710
EA-300-H225-710
EA-300-H245-710
EA-310-H095-710
EA-310-H125-710
EA-310-H145-710
EA-310-H175-710
EA-310-H195-710
EA-310-H225-710
EA-310-H245-710
EA-325-H095-710
EA-325-H125-710
EA-325-H145-710
EA-325-H175-710
EA-325-H195-710
EA-325-H225-710
EA-325-H245-710
EA-330-H095-710
EA-330-H125-710
EA-330-H145-710
EA-330-H175-710
EA-330-H195-710
EA-330-H225-710
EA-330-H245-710
EA-350-H095-710
EA-350-H125-710
EA-350-H145-710
EA-350-H175-710
EA-350-H195-710
EA-350-H225-710
EA-350-H245-710
EA-375-H095-710
EA-375-H125-710
EA-375-H145-710
EA-375-H175-710
EA-375-H195-710
EA-375-H225-710
EA-375-H245-710
EA-400-H095-710
EA-400-H125-710
EA-400-H145-710
EA-400-H175-710
EA-400-H195-710
EA-400-H225-710
EA-400-H245-710
EA-425-H095-710
EA-425-H125-710
EA-425-H145-710
EA-425-H175-710
EA-425-H195-710
EA-425-H225-710
EA-425-H245-710
EA-450-H095-710
EA-450-H125-710
EA-450-H145-710
EA-450-H175-710
EA-450-H195-710
EA-450-H225-710
EA-450-H245-710
EA-MT001
k2338B-ACHG
ML24G
ML33G
ML33G
ML4G
ML97/38
ML97/38WPINS
ML97/50
ML97/50WPINS
SW25-2G
SW25-4G
SW25-4G
SW25-6G
SW36-33G
SW38-2G
SW38-4G
SW50-2G
SW50-4G
SW63-2G
SW63-4G
YB324G
MAX01NG
MAX02-HNG
MAX02NG
MAX03HNG
MAX03NG
MAX04NG
MAX07NG
MAX08NG
MAX09NG
MAX10NG
MAX11NG
MAX12NG
MAX13NG
MAX23NG
10-5607-04G
M45165B021000G
M46165B021000G
M47059B011000G
M47079B011000G
M47098B011000G
M47118B021000G
M48059B011000G
M48079B011000G
M48098B011000G
M48118B021000G
M49138B011000G
M49165B021000G
4860
4804G
4860M
4870M
4880G
4880MG
4880SG
342940
342941
342942
342943
342945
342946
342947
342948
342949
342950
115000F00000G
115100F00000G
115200F00000G
115300F00000G
115400F00000G
116200F00000G
118300F00000G
CLP-201
CLP-207
CLP-212G
CLP-212MG
CLP-212PG
CLP-212SG
CLP-212TG
1130BG
220SA
220SA
311505B00000G
321127B00000G
321527A00000G
321527B00000G
322400B00000G
341700F00000G
341800F00000G
341900F00000G
500103B00000G
500203B00000G
500403B00000G
501200B00000G
501303B00000G
501403B00000G
501503B00000G
501603B00000G
501706B00000G
501806B00000G
501906B00000G
502006B00000G
504102B00000G
504222B00000G
505403B00000G
505403B00100G
506003B00000G
506007B00000G
506902B00000G
507002B00000G
507002B05300G
507102B00000G
507222B00000G
507222B05300G
507302B00000G
516829B00000G
519903B00000G
520329B00000G
523002B00000G
523002D00000G
523002T00000G
530101B00100G
530101B00150G
530102B00100G
530102B00150G
530122B00162G
530161B00162G
530162B00162G
530400B00100G
530400B00100G
530402B00100G
530402B00150G
530510B00000G
530613B00000G
530614B00000G
530714B00000G
530714B05300G
530801B05150G
530802B05100G
530802B05100G
530861B05162G
533802B02500G
534202B02853G
534202B03453G
534202B33453G
542502B00000G
542502D00000G
551002B00000G
552507B00000G
552703B00000G
552844B00000G
553003B00000G
560200B00000G
563002B00000G
563002D00000G
563002T00000G
563202B00000G
566010B00000G
566010B03400G
569003B00000G
569022B00000G
572802B00000G
572802B03100G
572802B03900G
572802B04000G
572802B04100G
573100D00000G
573300D00000G
573400D00000G
573902B00000G
573902B04000G
574004B00000G
574102B00000G
574102B03300G
574102B03700G
574204B00000G
574204B03300G
574402B03200G
574502B00000G
574502B03200G
574502B03300G
574502B03700G
574602B00000G
574602B03300G
574602B03700G
574802B03300G
574802B03700G
574902B00000G
574902B03300G
574902B03700G
574902B04300G
575002B00000G
575002D00000G
575002T00000G
575102B00000G
575200B00000G
575603B00000G
575703B00000G
575803B00000G
575815B00000G
575903B00000G
576012B00000G
576403B00000G
576602B00000G
576602D00000G
576602T00000G
576802B00000G
576802B03100G
576802B03300G
576802B03700G
576802B03900G
576802B04000G
576802B04100G
576904B00000G
577002B00000G
577002B04000G
577102B00000G
577102B04000G
577202B00000G
577202B04000G
577304B00000G
577404B00000G
577500B00000G
577922B00000G
578105B00000G
578205B00000G
578305B00000G
578405B00000G
578622B00000G
578622B03200G
578902B03200G
579103B00000G
579103V00000G
579206B00000G
579302B00000G
579402B00000G
579604B00000G
579704B00000G
580100B00000G
580200B00000G
580200W00000G
580400B00000G
580500B00000G
584000B00000G
590102B03600G
590302B03600G
591202B00000G
591202B03100G
591202B03700G
591202B04000G
591302B00000G
591302B02800G
591302B04000G
592201B03400G
592502B02800G
592502B03400G
592902B03400G
593002B00000G
593002B03400G
593101B03600G
593202B03400G
593202B03500G
6000DG
6021BG
6021B-SF1G
6022BG
6025B-TTG
6025DG
6030B-TTG
6030D(COPPER)G
6032B-TTG
6038BG
6038B-TTG
6043BG
6084BG
6094BG
6222BG
6223BG
6224BG
6225B-MTG
6236BG
6237BG
6238BG
6238B-MTG
6239B-MTG
6263B-MT5G
6273BG
7019BG
7019B-MTG
7020BG
7020B-MTG
7020B-TC12-MTG
7021BG
7021B-MTG
7021B-TC10-MTG
7021B-TC12-MTG
7022B-MTG
7023BG
7023B-MTG
7023B-TC12-MTG
7023B-TC6-MTG
7024B-MTG
7025BG
7025B-MTG
7038BG
7106DG
7109DG
7121DG
7128DG
7136DG
7137DG
7138DG
7139DG
7140DG
7141DG
7142DG
7148DG
7173DG
7178DG
CP68G
ML7G
ML8G
PF432G
PF433G
PF434G
PF435G
PF436G
PF720G
PF730G
PF750G
PF752BG
PF758G
TV-100G
TV-1500G
TV-1505G
TV-265G
TV-265G
TV-265G
TV-35G
TV-3G
TV-40G
TV-47G
TV-4G
TV-58G
TV-5G
TV-96G
TV-96G
103G
110700F00000G
110G
113G
114G
4003-1G
4003G
4005G
4018G
4103G
4169G
4170G
4171G
4177G
4180G
56-02-101G
56-02-10G
56-02-72G
56-03-2G
56-03-8G
56-77-10G
56-77-11G
7717-108NG
7717-122DAPG
7717-130NG
7717-137DAPG
7717-149DAPG
7717-149NG
7717-153DAPG
7717-156DAPG
7717-156NG
7717-15DAPG
7717-15NG
7717-167NG
7717-16DAPG
7717-16NG
7717-175DAPG
7717-175NG
7717-178DAPG
7717-178NG
7717-18DAPG
7717-18NG
7717-19NG
7717-21NG
7717-22NG
7717-247NG
7717-30NG
7717-3DAPG
7717-3NG
7717-44NG
7717-4DAPG
7717-4NG
7717-5DAPG
7717-5NG
7717-79NG
7717-7DAPG
7717-7NG
7717-86NG
7717-89DAPG
7717-89NG
7717-8DAPG
7717-93NG
7717-94NG
7721-10PPSG
7721-12NG
7721-13NG
7721-14NG
7721-15NG
7721-3PPSG
7721-4PPSG
7721-5PPSG
7721-6PPSG
7721-7PPSG
7721-8PPSG
7721-9PPSG
8903NWG
8903VBG
8909NBG
B-250-130-62G
B-470-235-40G
B-510-200-40G
B-800-260-62G
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