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TO-3 Thermal Management

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (HKD) Filter the results in the table by unit price based on your quantity.	Qty.
Heat Sinks Diamond Shaped, Basket Heat Sink for TO-3, Horizontal, 7.8 Degree C/W, 31.75mm 501603B00000G Aavid 1: HK$16.44 929In Stock	Mfr. Part No. 501603B00000G Mouser Part No 532-501603B00	Aavid	Heat Sinks Diamond Shaped, Basket Heat Sink for TO-3, Horizontal, 7.8 Degree C/W, 31.75mm	Datasheet	929In Stock	HK$16.44 HK$15.12 HK$14.71 HK$14.39 View HK$13.56 HK$13.32 HK$11.26 HK$10.60	Min.: 1 Mult.: 1
Heat Sinks Basket Heat Sink, TO3, Space-Saving, Horizontal, 13.4 Degree C/W, 19.05mm 575703B00000G Aavid 1: HK$27.95 542In Stock 6,000Expected 23/4/2027	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	542In Stock 6,000Expected 23/4/2027	HK$27.95 HK$24.74 HK$23.59 HK$22.44 View HK$21.87 HK$21.78	Min.: 1 Mult.: 1
Heat Sinks Snap-On Cover for TO-3, Nylon, Black 8909NBG Aavid 1: HK$2.71 3,468In Stock	Mfr. Part No. 8909NBG Mouser Part No 532-8909NBG	Aavid	Heat Sinks Snap-On Cover for TO-3, Nylon, Black	Datasheet	3,468In Stock	HK$2.71 HK$2.50 HK$2.47	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: HK$143.03 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	HK$143.03 HK$127.82 HK$121.74 HK$116.64 View HK$112.37 HK$107.02 HK$103.65	Min.: 1 Mult.: 1
Heat Sinks Double-Surface Heat Sink for TO-3 Case Styles, 120.7x76.2x31.8mm 403K Wakefield Thermal 1: HK$164.15 44In 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	44In Stock	HK$164.15 HK$140.89 HK$135.71 HK$132.84 View HK$125.52 HK$122.31 HK$117.87	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: HK$159.63 56In 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	56In Stock	HK$159.63 HK$145.74 HK$138.51 HK$137.69 View HK$134.89 HK$132.18 HK$130.45 Quote	Min.: 1 Mult.: 1
Heat Sinks Natural Convection Heat Sink for Metal-Case Semis for TO3, 25.4mm H 641A Wakefield Thermal 1: HK$105.87 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	HK$105.87 HK$93.71 HK$88.45 HK$85.16 View HK$82.04 HK$78.58 HK$75.95 HK$73.24	Min.: 1 Mult.: 1
Heat Sinks Natural Convection Heat Sink for Metal-Case Semis, No Hole Pattern, 25.4mm H 641K Wakefield Thermal 1: HK$114.09 36In 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	36In Stock	HK$114.09 HK$101.02 HK$95.27 HK$89.93 View HK$85.73 HK$81.05 HK$78.91	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: HK$79.65 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	HK$79.65 HK$76.69 HK$72.42 HK$68.14 View HK$63.87 HK$59.60 HK$57.29 HK$56.39 Quote	Min.: 1 Mult.: 1
Heat Sinks Heatsink, T03 HS09 Apex Microtechnology 1: HK$113.19 250Expected 27/11/2026	Mfr. Part No. HS09 Mouser Part No 137-HS09	Apex Microtechnology	Heat Sinks Heatsink, T03	Datasheet	250Expected 27/11/2026	HK$113.19 HK$104.64 HK$98.48 HK$92.39 View HK$88.69 HK$84.50 HK$81.38 HK$79.16	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: HK$74.64 1,980Expected 9/10/2026	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	1,980Expected 9/10/2026	HK$74.64 HK$74.56 Quote Quote	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: HK$115.98 111In 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	111In Stock	HK$115.98 HK$108.18 HK$101.02 HK$95.93 View HK$93.46 HK$89.02 HK$84.09 HK$82.53 Quote	Min.: 1 Mult.: 1
Heat Sinks Double-Surface Heat Sink for TO-3 Case Styles, 120.7x38.1x31.8mm 401K Wakefield Thermal 1: HK$120.51 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		112Expected 28/10/2026	HK$120.51 HK$110.39 HK$100.86 HK$97.08 View HK$97.00 HK$92.39 HK$85.49 HK$83.68 Quote	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: HK$41.68 303Expected 12/10/2026	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	303Expected 12/10/2026	HK$41.68 HK$40.44 HK$39.78 HK$36.58 View HK$34.77 HK$34.69 HK$33.95 HK$32.14 HK$31.73	Min.: 1 Mult.: 1
Heat Sinks Maximum Efficiency, Omnidirectional Heat Sink for TO-3, 12.7mm Height 680-5A Wakefield Thermal 1: HK$195.14 17Expected 21/12/2026	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	17Expected 21/12/2026	HK$195.14 HK$184.62 HK$176.89 HK$168.84 HK$149.77	Min.: 1 Mult.: 1
Heat Sinks Heatsink, T03 HS03 Apex Microtechnology 1: HK$711.69 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	HK$711.69 HK$647.98 HK$604.75 HK$583.13 View HK$561.75 Quote	Min.: 1 Mult.: 1
Heat Sinks Heatsink, T03 HS04 Apex Microtechnology 1: HK$1,332.46 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	HK$1,332.46 HK$1,178.83 HK$1,122.77 HK$1,082.41 View Quote	Min.: 1 Mult.: 1
Heat Sinks Heatsink, T03 HS05 Apex Microtechnology 1: HK$1,063.91 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	HK$1,063.91 HK$988.46 HK$922.45 HK$889.57 View HK$857.02 Quote	Min.: 1 Mult.: 1
Heat Sinks Hat Section Heat Sink for TO-3, Low Profile, Horizontal, 7 Degree C/W, Black 506003B00000G Aavid 1: HK$8.96 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	HK$8.96 HK$7.89 HK$7.69 HK$7.47 View HK$7.06 HK$6.66 HK$6.42 HK$6.18 HK$5.68	Min.: 1 Mult.: 1
Heat Sinks Channel Style Heat Sink for TO-3, Base Only 520329B00000G Aavid 25,000: HK$5.44 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	HK$5.44	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: HK$12.99 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 about Wakefield Thermal wakefield vette ultimiflux thermal materials	Datasheet	Non-Stocked Lead-Time 8 Weeks	HK$12.99 HK$11.92	Min.: 1,000 Mult.: 500
Thermal Interface Products Insulator 110500F00000G Aavid 10,000: HK$17.51 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	HK$17.51	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: HK$448.48 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	HK$448.48 View Quote	Min.: 100 Mult.: 50
Heat Sinks Mounting Kit with Thermalfilm Insulator for TO-3 4804 REV D-G Aavid 2,000: HK$49.07 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	HK$49.07	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: HK$50.06 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	HK$50.06 HK$44.63 HK$42.66 HK$40.77 View HK$38.96 HK$36.83 HK$35.67	Min.: 1 Mult.: 1

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