.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 Basket Heat Sink, TO3, Space-Saving, Horizontal, 13.4 Degree C/W, 19.05mm

575703B00000G
Aavid
1: $3.40
729In Stock

Mfr. Part No.
575703B00000G

Mouser Part No
532-575703B00

Aavid

Heat Sinks Basket Heat Sink, TO3, Space-Saving, Horizontal, 13.4 Degree C/W, 19.05mm

Datasheet

729In Stock

$3.40

$3.01

$2.87

$2.73

View

Min.: 1
Mult.: 1

Heat Sinks Snap-On Cover for TO-3, Nylon, Black

8909NBG
Aavid
1: $0.33
4,621In Stock

Mfr. Part No.
8909NBG

Mouser Part No
532-8909NBG

Aavid

Heat Sinks Snap-On Cover for TO-3, Nylon, Black

Datasheet

4,621In Stock

$0.33

$0.304

$0.301

Min.: 1
Mult.: 1

Heat Sinks Double-Surface Heat Sink for TO3, 120.7x38.1x31.8mm, (1) TO3 Hole Mount Pattern

401A
Wakefield Thermal
1: $13.84
29In Stock

Mfr. Part No.
401A

Mouser Part No
567-401-A

Wakefield Thermal

Heat Sinks Double-Surface Heat Sink for TO3, 120.7x38.1x31.8mm, (1) TO3 Hole Mount Pattern

Datasheet

29In Stock

$13.84

$12.67

$12.06

$11.46

View

Min.: 1
Mult.: 1

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

401K
Wakefield Thermal
1: $14.31
23In Stock
112Expected 28/10/2026

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

23In Stock

112Expected 28/10/2026

$14.31

$12.67

$12.07

$11.56

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: $17.27
27In 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

27In Stock

$17.27

$15.55

$14.81

$14.19

View

Min.: 1
Mult.: 1

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

403K
Wakefield Thermal
1: $19.05
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

$19.05

$17.82

$17.16

$16.06

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: $19.42
68In 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

68In Stock

$19.42

$17.45

$16.74

$15.14

View

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: $4.51
2In Stock
500Expected 24/09/2026

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 24/09/2026

$4.51

$4.36

$4.29

$4.04

View

Min.: 1
Mult.: 1

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

641A
Wakefield Thermal
1: $12.68
86In 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

86In Stock

$12.68

$11.40

$10.75

$10.36

View

Min.: 1
Mult.: 1

Heat Sinks Natural Convection Heat Sink for Metal-Case Semis, No Hole Pattern, 25.4mm H

641K
Wakefield Thermal
1: $12.41
40In Stock

Mfr. Part No.
641K

Mouser Part No
567-641-K

Wakefield Thermal

Heat Sinks Natural Convection Heat Sink for Metal-Case Semis, No Hole Pattern, 25.4mm H

Datasheet

40In Stock

$12.41

$11.57

$10.84

$9.91

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: $9.69
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

$9.69

$9.33

$8.81

$8.29

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: $10.11
2,570On 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

2,570On Order

$10.11

$9.26

$8.74

$8.51

View

Min.: 1
Mult.: 1

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

421A
Wakefield Thermal
1: $23.34
67Expected 04/09/2026

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 04/09/2026

$23.34

$21.18

$20.10

$19.55

View

Min.: 1
Mult.: 1

Heat Sinks Maximum Efficiency, Omnidirectional Heat Sink for TO-3, 12.7mm Height

680-5A
Wakefield Thermal
1: $17.42
19Expected 09/11/2026

Mfr. Part No.
680-5A

Mouser Part No
567-680-5A

Wakefield Thermal

Heat Sinks Maximum Efficiency, Omnidirectional Heat Sink for TO-3, 12.7mm Height

Datasheet

19Expected 09/11/2026

$17.42

$16.58

$16.57

Min.: 1
Mult.: 1

Heat Sinks Heatsink, T03

HS03
Apex Microtechnology
1: $86.58
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

$86.58

$78.83

$73.57

$70.94

View

Min.: 1
Mult.: 1

Heat Sinks Heatsink, T03

HS04
Apex Microtechnology
1: $162.10
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

$162.10

$143.41

$136.59

$131.68

View

Min.: 1
Mult.: 1

Heat Sinks Heatsink, T03

HS05
Apex Microtechnology
1: $129.43
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

$129.43

$120.25

$112.22

$108.22

View

Min.: 1
Mult.: 1

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

HS11
Apex Microtechnology
1: $402.05
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

$402.05

$370.45

$343.99

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

$0.96

$0.935

$0.909

View

Min.: 1
Mult.: 1

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

520329B00000G
Aavid
25,000: $0.662
Non-Stocked Lead-Time 8 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 8 Weeks

$0.662

Min.: 25,000
Mult.: 500

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

CD-02-05-3-4
Wakefield Thermal
1,000: $1.41
Non-Stocked Lead-Time 8 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 8 Weeks

$1.41

$1.19

Min.: 1,000
Mult.: 500

Thermal Interface Products Insulator

110500F00000G
Aavid
10,000: $2.13
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

$2.13

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: $54.05
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

$54.05

View

Min.: 100
Mult.: 50

Heat Sinks Mounting Kit with Thermalfilm Insulator for TO-3

4804 REV D-G
Aavid
2,000: $5.97
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

$5.97

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: $5.83
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

$5.83

$5.20

$4.97

$4.75

View

Min.: 1
Mult.: 1

TO-3 Thermal Management

Types of Thermal Management

Customer Service Office

Company

Resources

Support