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TO-3 Thermal Management

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (USD) Filter the results in the table by unit price based on your quantity.	Qty.
Heat Sinks Heat Sink for TO3, 120.7x76.2x66.7mm, (1) TO3 Mounting Hole Pattern 421A Wakefield Thermal 1: $25.93 66In Stock	Mfr. Part # 421A Mouser Part # 567-421A	Wakefield Thermal	Heat Sinks Heat Sink for TO3, 120.7x76.2x66.7mm, (1) TO3 Mounting Hole Pattern	Datasheet	66In Stock	$25.93 $24.33 $22.41 $21.39 View $19.86 $18.98 $18.81 Quote	Min.: 1 Mult.: 1
Heat Sinks Heat Sink for TO3, 120.7x140.2x66.7mm, (1) TO3 Mounting Hole Pattern 423A Wakefield Thermal 1: $29.11 31In Stock	Mfr. Part # 423A Mouser Part # 567-423-A	Wakefield Thermal	Heat Sinks Heat Sink for TO3, 120.7x140.2x66.7mm, (1) TO3 Mounting Hole Pattern	Datasheet	31In Stock	$29.11 $25.23 $24.49 $21.91 View $21.88 Quote	Min.: 1 Mult.: 1
Heat Sinks Basket Heat Sink, TO3, Space-Saving, Horizontal, 13.4 Degree C/W, 19.05mm 575703B00000G Aavid 1: $2.87 538In Stock 6,000Expected 4/23/2027	Mfr. Part # 575703B00000G Mouser Part # 532-575703B00	Aavid	Heat Sinks Basket Heat Sink, TO3, Space-Saving, Horizontal, 13.4 Degree C/W, 19.05mm	Datasheet	538In Stock 6,000Expected 4/23/2027	$2.87 $2.54 $2.42 $2.33 View $2.22 $2.14 $2.09 $2.06 $2.02	Min.: 1 Mult.: 1
Heat Sinks Snap-On Cover for TO-3, Nylon, Black 8909NBG Aavid 1: $0.33 3,363In Stock	Mfr. Part # 8909NBG Mouser Part # 532-8909NBG	Aavid	Heat Sinks Snap-On Cover for TO-3, Nylon, Black	Datasheet	3,363In 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: $14.11 6In Stock 112Expected 2/22/2027	Mfr. Part # 401A Mouser Part # 567-401-A	Wakefield Thermal	Heat Sinks Double-Surface Heat Sink for TO3, 120.7x38.1x31.8mm, (1) TO3 Hole Mount Pattern	Datasheet	6In Stock 112Expected 2/22/2027	$14.11 $13.16 $12.29 $11.67 View $11.37 $11.06 $10.46 $10.26	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: $17.40 25In Stock	Mfr. Part # 401F Mouser Part # 567-401F	Wakefield Thermal	Heat Sinks Double-Surface Heat Sink for TO-3 Case, 120.7x38.1x31.8mm, 6.9mm Dia. Mount Hole	Datasheet	25In Stock	$17.40 $15.55 $14.81 $14.19 View $13.67 $13.02 $12.61	Min.: 1 Mult.: 1
Heat Sinks Double-Surface Heat Sink for TO-3 Case Styles, 120.7x76.2x31.8mm 403K Wakefield Thermal 1: $19.97 44In Stock	Mfr. Part # 403K Mouser Part # 567-403K	Wakefield Thermal	Heat Sinks Double-Surface Heat Sink for TO-3 Case Styles, 120.7x76.2x31.8mm	Datasheet	44In Stock	$19.97 $17.14 $16.51 $16.16 View $15.27 $14.88 $14.34	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 48In Stock	Mfr. Part # 413K Mouser Part # 567-413K	Wakefield Thermal	Heat Sinks Double-Surface Heat Sink for TO-3 Case Styles and Diodes, 120.7x76.2x47.6mm	Datasheet	48In Stock	$19.42 $17.73 $17.21 $16.41 View $16.30 $16.04	Min.: 1 Mult.: 1
Heat Sinks Natural Convection Heat Sink for Metal-Case Semis for TO3, 25.4mm H 641A Wakefield Thermal 1: $12.79 85In Stock	Mfr. Part # 641A Mouser Part # 567-641-A	Wakefield Thermal	Heat Sinks Natural Convection Heat Sink for Metal-Case Semis for TO3, 25.4mm H	Datasheet	85In Stock	$12.79 $11.40 $10.76 $10.36 View $9.98 $9.56 $9.24 $8.91	Min.: 1 Mult.: 1
Heat Sinks Natural Convection Heat Sink for Metal-Case Semis, No Hole Pattern, 25.4mm H 641K Wakefield Thermal 1: $13.88 6In Stock 120Expected 2/22/2027	Mfr. Part # 641K Mouser Part # 567-641-K	Wakefield Thermal	Heat Sinks Natural Convection Heat Sink for Metal-Case Semis, No Hole Pattern, 25.4mm H	Datasheet	6In Stock 120Expected 2/22/2027	$13.88 $12.29 $11.59 $10.94 View $10.43 $9.86 $9.60	Min.: 1 Mult.: 1
Heat Sinks Maximum Efficiency, Omnidirectional Heat Sink for TO-3, 25.4mm Height 680-10A Wakefield Thermal 1: $16.23 83In Stock	Mfr. Part # 680-10A Mouser Part # 567-680-10A	Wakefield Thermal	Heat Sinks Maximum Efficiency, Omnidirectional Heat Sink for TO-3, 25.4mm Height	Datasheet	83In Stock	$16.23 $15.68 $12.62 $12.42 View $10.64 $10.41	Min.: 1 Mult.: 1
Heat Sinks Heatsink, T03 HS09 Apex Microtechnology 1: $13.77 250Expected 12/24/2026	Mfr. Part # HS09 Mouser Part # 137-HS09	Apex Microtechnology	Heat Sinks Heatsink, T03	Datasheet	250Expected 12/24/2026	$13.77 $12.73 $11.98 $11.24 View $10.79 $10.28 $9.90 $9.63	Min.: 1 Mult.: 1
Heat Sinks Maximum Efficiency, Omnidirectional Heat Sink for TO-3, 12.7mm Height 680-5A Wakefield Thermal 1: $23.74 243Expected 12/21/2026	Mfr. Part # 680-5A Mouser Part # 567-680-5A	Wakefield Thermal	Heat Sinks Maximum Efficiency, Omnidirectional Heat Sink for TO-3, 12.7mm Height	Datasheet	243Expected 12/21/2026	$23.74 $22.46 $21.52 $20.54 $18.22	Min.: 1 Mult.: 1
Heat Sinks Double-Surface Heat Sink for TO-3 Case Styles, 120.7x38.1x31.8mm 401K Wakefield Thermal 1: $15.15 112Expected 11/16/2026	Mfr. Part # 401K Mouser Part # 567-401-K	Wakefield Thermal	Heat Sinks Double-Surface Heat Sink for TO-3 Case Styles, 120.7x38.1x31.8mm		112Expected 11/16/2026	$15.15 $13.43 $12.79 $12.26 View $11.80 $11.24 $10.46 $10.23	Min.: 1 Mult.: 1
Heat Sinks Heatsink, T03 HS03 Apex Microtechnology 1: $152.79 Non-Stocked Lead-Time 16 Weeks	Mfr. Part # HS03 Mouser Part # 137-HS03	Apex Microtechnology	Heat Sinks Heatsink, T03	Datasheet	Non-Stocked Lead-Time 16 Weeks	$152.79 $138.19 $129.37 $124.58	Min.: 1 Mult.: 1
Heat Sinks Heatsink, T03 HS04 Apex Microtechnology 1: $96.15 Non-Stocked Lead-Time 16 Weeks	Mfr. Part # HS04 Mouser Part # 137-HS04	Apex Microtechnology	Heat Sinks Heatsink, T03	Datasheet	Non-Stocked Lead-Time 16 Weeks	$96.15 $87.54 $81.70 $78.78 $75.86	Min.: 1 Mult.: 1
Heat Sinks Heatsink, T03 HS05 Apex Microtechnology 1: $75.65 Non-Stocked Lead-Time 16 Weeks	Mfr. Part # HS05 Mouser Part # 137-HS05	Apex Microtechnology	Heat Sinks Heatsink, T03	Datasheet	Non-Stocked Lead-Time 16 Weeks	$75.65 $68.53 $63.96 $61.67 $59.39	Min.: 1 Mult.: 1
Heat Sinks Hat Section Heat Sink for TO-3, Low Profile, Horizontal, 7 Degree C/W, Black 506003B00000G Aavid 10,000: $0.691 Non-Stocked Lead-Time 4 Weeks	Mfr. Part # 506003B00000G Mouser Part # 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	$0.691	Min.: 10,000 Mult.: 10,000
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 # 520329B00000G Mouser Part # 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: $1.58 Non-Stocked Lead-Time 8 Weeks	Mfr. Part # CD-02-05-3-4 Mouser Part # 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	$1.58 $1.45	Min.: 1,000 Mult.: 500
Thermal Interface Products Insulator 110500F00000G Aavid 10,000: $2.13 Non-Stocked Lead-Time 13 Weeks	Mfr. Part # 110500F00000G Mouser Part # 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: $54.56 Non-Stocked Lead-Time 13 Weeks	Mfr. Part # 4003-1G Mouser Part # 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	$54.56 View Quote	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 # 4804 REV D-G Mouser Part # 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 4,000: $7.22 Non-Stocked Lead-Time 13 Weeks	Mfr. Part # 505403B00000G Mouser Part # 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	$7.22	Min.: 4,000 Mult.: 500
Heat Sinks Square Basket Heat Sink for TO-3, Horizontal, Black, 45.21x45.21x11.94mm 552703B00000G Aavid 10,000: $2.39 Non-Stocked Lead-Time 32 Weeks	Mfr. Part # 552703B00000G Mouser Part # 532-552703B00	Aavid	Heat Sinks Square Basket Heat Sink for TO-3, Horizontal, Black, 45.21x45.21x11.94mm	Datasheet	Non-Stocked Lead-Time 32 Weeks	$2.39	Min.: 10,000 Mult.: 5,000

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