.hide-partial { max-height: none; } .show-more { display: none; }

TO-3 Thermal Management

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Types of Thermal Management

List Images

Results: 67

Applied Filters:

Designed for = TO-3

Reset All

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Part #

Heat Sinks Double-Surface Heat Sink for TO-3 Case Styles, 120.7x38.1x31.8mm

401K
Wakefield Thermal
1: $17.67
27In Stock

Mfr. Part No.
401K

Mouser Part No
567-401-K

Wakefield Thermal

Heat Sinks Double-Surface Heat Sink for TO-3 Case Styles, 120.7x38.1x31.8mm

27In Stock

$17.67

$17.19

$16.04

$16.03

View

Min.: 1
Mult.: 1

Heat Sinks Double-Surface Heat Sink for TO-3 Case, 120.7x38.1x31.8mm, 6.9mm Dia. Mount Hole

401F
Wakefield Thermal
1: $20.25
104In Stock

Mfr. Part No.
401F

Mouser Part No
567-401F

Wakefield Thermal

Heat Sinks Double-Surface Heat Sink for TO-3 Case, 120.7x38.1x31.8mm, 6.9mm Dia. Mount Hole

Datasheet

104In Stock

$20.25

$17.79

$17.03

$16.21

View

Min.: 1
Mult.: 1

Heat Sinks Double-Surface Heat Sink for TO-3 Case Styles, 120.7x76.2x31.8mm

403K
Wakefield Thermal
1: $22.28
46In Stock

Mfr. Part No.
403K

Mouser Part No
567-403K

Wakefield Thermal

Heat Sinks Double-Surface Heat Sink for TO-3 Case Styles, 120.7x76.2x31.8mm

Datasheet

46In Stock

$22.28

$20.85

$20.07

$18.79

View

Min.: 1
Mult.: 1

Heat Sinks Double-Surface Heat Sink for TO-3 Case Styles and Diodes, 120.7x76.2x47.6mm

413K
Wakefield Thermal
1: $24.98
70In Stock

Mfr. Part No.
413K

Mouser Part No
567-413K

Wakefield Thermal

Heat Sinks Double-Surface Heat Sink for TO-3 Case Styles and Diodes, 120.7x76.2x47.6mm

Datasheet

70In Stock

$24.98

$21.22

$19.83

$19.07

Min.: 1
Mult.: 1

Heat Sinks Low Profile Heat Sink for All Metal-Case Power Semis, No Hole, 120.6x38.1x11.7mm

621K
Wakefield Thermal
1: $6.19
2In Stock
500Expected 2026/09/24

Mfr. Part No.
621K

Mouser Part No
567-621K

Wakefield Thermal

Heat Sinks Low Profile Heat Sink for All Metal-Case Power Semis, No Hole, 120.6x38.1x11.7mm

Datasheet

2In Stock

500Expected 2026/09/24

$6.19

$5.87

$5.72

$5.40

View

Min.: 1
Mult.: 1

Heat Sinks Natural Convection Heat Sink for Metal-Case Semis for TO3, 25.4mm H

641A
Wakefield Thermal
1: $15.07
98In Stock

Mfr. Part No.
641A

Mouser Part No
567-641-A

Wakefield Thermal

Heat Sinks Natural Convection Heat Sink for Metal-Case Semis for TO3, 25.4mm H

Datasheet

98In Stock

$15.07

$13.34

$12.57

$12.12

View

Min.: 1
Mult.: 1

Heat Sinks Diamond Shaped, Basket Heat Sink for TO-3, Horizontal, 10.1 Degree C/W, 12.5mm

PF523G
Aavid
1: $8.89
156In Stock

Mfr. Part No.
PF523G

Mouser Part No
532-PF-523

Aavid

Heat Sinks Diamond Shaped, Basket Heat Sink for TO-3, Horizontal, 10.1 Degree C/W, 12.5mm

Datasheet

156In Stock

$8.89

$8.82

$8.29

$7.97

Quote

Min.: 1
Mult.: 1

Heat Sinks Heatsink, T03

HS13
Apex Microtechnology
1: $150.68
60Expected 2026/06/25

Mfr. Part No.
HS13

Mouser Part No
137-HS13

Apex Microtechnology

Heat Sinks Heatsink, T03

Datasheet

60Expected 2026/06/25

$150.68

$136.28

$127.58

$122.88

View

Min.: 1
Mult.: 1

Heat Sinks Square Basket Heat Sink for TO-3, Slanted Fin, Horizontal, 5 Degree C/W, 31.75mm

500403B00000G
Aavid
1: $12.92
2,582On Order

Mfr. Part No.
500403B00000G

Mouser Part No
532-500403B00

Aavid

Heat Sinks Square Basket Heat Sink for TO-3, Slanted Fin, Horizontal, 5 Degree C/W, 31.75mm

Datasheet

2,582On Order

$12.92

$12.39

$11.68

$11.58

View

Min.: 1
Mult.: 1

Heat Sinks Basket Heat Sink for TO-3, Fold Back Fin, Horizontal, 5.5 Degree C/W, 33.27mm

569003B00000G
Aavid
1: $5.33
1,498Expected 2026/08/11

Mfr. Part No.
569003B00000G

Mouser Part No
532-569003B00

Aavid

Heat Sinks Basket Heat Sink for TO-3, Fold Back Fin, Horizontal, 5.5 Degree C/W, 33.27mm

Datasheet

1,498Expected 2026/08/11

$5.33

$4.84

$4.56

$4.40

View

Min.: 1
Mult.: 1

Heat Sinks Maximum Efficiency, Omnidirectional Heat Sink for TO-3, 31.8mm Height

680-125A
Wakefield Thermal
1: $19.26
497Expected 2026/07/16

Mfr. Part No.
680-125A

Mouser Part No
567-680-125A

Wakefield Thermal

Heat Sinks Maximum Efficiency, Omnidirectional Heat Sink for TO-3, 31.8mm Height

Datasheet

497Expected 2026/07/16

$19.26

$17.95

$16.90

$15.84

View

Min.: 1
Mult.: 1

Heat Sinks Maximum Efficiency, Omnidirectional Heat Sink, No Hole Pattern, 31.8mm Height

680-125K
Wakefield Thermal
1: $20.02
238Expected 2026/07/15

Mfr. Part No.
680-125K

Mouser Part No
567-680-125K

Wakefield Thermal

Heat Sinks Maximum Efficiency, Omnidirectional Heat Sink, No Hole Pattern, 31.8mm Height

Datasheet

238Expected 2026/07/15

$20.02

$20.00

$19.91

$19.86

View

Min.: 1
Mult.: 1

Heat Sinks Heat Sink for TO3, 120.7x76.2x66.7mm, (1) TO3 Mounting Hole Pattern

421A
Wakefield Thermal
1: $26.18
67Expected 2026/08/14

Mfr. Part No.
421A

Mouser Part No
567-421A

Wakefield Thermal

Heat Sinks Heat Sink for TO3, 120.7x76.2x66.7mm, (1) TO3 Mounting Hole Pattern

Datasheet

67Expected 2026/08/14

$26.18

$25.40

$23.17

$22.52

View

Min.: 1
Mult.: 1

Heat Sinks Double-Surface Heat Sink for TO-3 Case, 120.7x76.2x31.8mm, 6.9mm Dia. Mount Hole

403F
Wakefield Thermal
1: $23.62
90Expected 2026/07/13

Mfr. Part No.
403F

Mouser Part No
567-403F

Wakefield Thermal

Heat Sinks Double-Surface Heat Sink for TO-3 Case, 120.7x76.2x31.8mm, 6.9mm Dia. Mount Hole

Datasheet

90Expected 2026/07/13

$23.62

$20.06

$18.70

Min.: 1
Mult.: 1

Heat Sinks Heatsink, T03

HS03
Apex Microtechnology
1: $86.60
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
HS03

Mouser Part No
137-HS03

Apex Microtechnology

Heat Sinks Heatsink, T03

Datasheet

Non-Stocked Lead-Time 16 Weeks

$86.60

$78.84

$73.58

$70.95

View

Min.: 1
Mult.: 1

Heat Sinks Heatsink, T03

HS04
Apex Microtechnology
1: $162.13
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
HS04

Mouser Part No
137-HS04

Apex Microtechnology

Heat Sinks Heatsink, T03

Datasheet

Non-Stocked Lead-Time 16 Weeks

$162.13

$143.43

$136.62

$131.83

Min.: 1
Mult.: 1

Heat Sinks Heatsink, T03

HS05
Apex Microtechnology
1: $129.45
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
HS05

Mouser Part No
137-HS05

Apex Microtechnology

Heat Sinks Heatsink, T03

Datasheet

Non-Stocked Lead-Time 16 Weeks

$129.45

$120.28

$112.24

$108.24

View

Min.: 1
Mult.: 1

Heat Sinks Heatsink, T03, PDIP, Pwr Pkg, H2O-cooled

HS11
Apex Microtechnology
1: $402.12
Non-Stocked Lead-Time 16 Weeks

Mfr. Part No.
HS11

Mouser Part No
137-HS11

Apex Microtechnology

Heat Sinks Heatsink, T03, PDIP, Pwr Pkg, H2O-cooled

Datasheet

Non-Stocked Lead-Time 16 Weeks

$402.12

$370.52

$344.05

Min.: 1
Mult.: 1

Heat Sinks Hat Section Heat Sink for TO-3, Low Profile, Horizontal, 7 Degree C/W, Black

506003B00000G
Aavid
1: $1.09
Non-Stocked Lead-Time 4 Weeks

Mfr. Part No.
506003B00000G

Mouser Part No
532-506003B00000G

Aavid

Heat Sinks Hat Section Heat Sink for TO-3, Low Profile, Horizontal, 7 Degree C/W, Black

Datasheet

Non-Stocked Lead-Time 4 Weeks

$1.09

$0.961

$0.935

$0.909

View

Min.: 1
Mult.: 1

Thermal Interface Products ulTIMiFlux Dielectric Phase Change Thermal Material, TO-3 Pad, 4 Pin

CD-02-05-3-4
Wakefield Thermal
1,000: $1.65
Non-Stocked Lead-Time 9 Weeks

Mfr. Part No.
CD-02-05-3-4

Mouser Part No
567-CD-02-05-3-4

Wakefield Thermal

Thermal Interface Products ulTIMiFlux Dielectric Phase Change Thermal Material, TO-3 Pad, 4 Pin

Learn More

Datasheet

Non-Stocked Lead-Time 9 Weeks

$1.65

$1.42

Min.: 1,000
Mult.: 500

Thermal Interface Products Insulator

110500F00000G
Aavid
10,000: $2.07
Non-Stocked Lead-Time 13 Weeks

Mfr. Part No.
110500F00000G

Mouser Part No
532-110500F00G

Aavid

Thermal Interface Products Insulator

Non-Stocked Lead-Time 13 Weeks

$2.07

Min.: 10,000
Mult.: 2,000

Thermal Interface Products Conductive Hardware for TO3, 39.65mm L, 26.67mm W, 0.81mm Thick, Ceramic

4003-1G
Aavid
100: $53.31
Non-Stocked Lead-Time 13 Weeks

Mfr. Part No.
4003-1G

Mouser Part No
532-4003-1

Aavid

Thermal Interface Products Conductive Hardware for TO3, 39.65mm L, 26.67mm W, 0.81mm Thick, Ceramic

Datasheet

Non-Stocked Lead-Time 13 Weeks

$53.31

$53.15

Quote

Min.: 100
Mult.: 50

Heat Sinks Mounting Kit with Thermalfilm Insulator for TO-3

4804 REV D-G
Aavid
2,000: $5.61
Non-Stocked Lead-Time 13 Weeks

Mfr. Part No.
4804 REV D-G

Mouser Part No
532-4804G

Aavid

Heat Sinks Mounting Kit with Thermalfilm Insulator for TO-3

Datasheet

Non-Stocked Lead-Time 13 Weeks

$5.61

Min.: 2,000
Mult.: 1,000

Heat Sinks Basket Heat Sink for TO-3, Straight Fin, Horizontal, 6 Degree C/W, 31.75mm

505403B00000G
Aavid
1: $7.90
Non-Stocked Lead-Time 13 Weeks

Mfr. Part No.
505403B00000G

Mouser Part No
532-505403B00000

Aavid

Heat Sinks Basket Heat Sink for TO-3, Straight Fin, Horizontal, 6 Degree C/W, 31.75mm

Datasheet

Non-Stocked Lead-Time 13 Weeks

$7.90

$7.26

$6.99

$6.78

View

Min.: 1
Mult.: 1

Heat Sinks Channel Style Heat Sink for TO-3, Base Only

520329B00000G
Aavid
1: $3.54
Non-Stocked Lead-Time 32 Weeks

Mfr. Part No.
520329B00000G

Mouser Part No
532-520329B00000G

Aavid

Heat Sinks Channel Style Heat Sink for TO-3, Base Only

Datasheet

Non-Stocked Lead-Time 32 Weeks

$3.54

$3.29

$3.20

$3.02

View

Min.: 1
Mult.: 1

TO-3 Thermal Management

Types of Thermal Management

Customer Service Office

Company

Resources

Support