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TO-3 Heat Sinks

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (IDR) Filter the results in the table by unit price based on your quantity.	Qty.	Product	Designed for	Mounting Style	Heatsink Material	Fin Style	Thermal Resistance	Length	Width	Height	Type
Heat Sinks Heat Sink for TO3, 120.7x76.2x66.7mm, 6.9mm dia. Hole Mounting Hole Pattern 421F Wakefield Thermal 1: Rp608.537 60In Stock	Mfr. Part No. 421F Mouser Part No 567-421F	Wakefield Thermal	Heat Sinks Heat Sink for TO3, 120.7x76.2x66.7mm, 6.9mm dia. Hole Mounting Hole Pattern	Datasheet	60In Stock	Rp608.537 Rp576.798 Rp551.297 Rp547.078 View Rp546.894 Rp531.300 Quote	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Screw	Aluminum	Extruded Axial Fin	0.7 C/W	76.2 mm	120.65 mm	66.67 mm	Component
Heat Sinks Maximum Efficiency, Omnidirectional Heat Sink, No Hole Pattern, 31.8mm Height 680-125K Wakefield Thermal 1: Rp302.159 127In Stock	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	127In Stock	Rp302.159 Rp281.611 Rp265.100 Rp262.164 Rp228.775	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Through Hole	Aluminum	Omnidirectional Fin	1.5 C/W	46 mm	46 mm	31.8 mm	Component
Heat Sinks Basket Heat Sink for TO-3, Fold Back Fin, Horizontal, 5.5 Degree C/W, 33.27mm 569003B00000G Aavid 1: Rp71.549 1.498In Stock	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	1.498In Stock	Rp71.549 Rp69.898 Rp61.276 Rp57.606 View Rp54.121 Rp52.103	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Screw	Aluminum	Folded Back Fin	5.5 C/W	46.482 mm	46.482 mm	33.274 mm	Component
Heat Sinks Space-Saving, Expandable Collar Heat Sink, TO3, Horizontal, 12.5 C/W, Black 579103B00000G Aavid 1: Rp47.700 2.707In Stock	Mfr. Part No. 579103B00000G Mouser Part No 532-579103B00	Aavid	Heat Sinks Space-Saving, Expandable Collar Heat Sink, TO3, Horizontal, 12.5 C/W, Black	Datasheet	2.707In Stock	Rp47.700 Rp43.480 Rp42.379 Rp39.994 View Rp37.609 Rp35.591 Rp34.124 Rp32.839 Rp30.087	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Screw	Aluminum	Channel Cut Fin	12.5 C/W	39.116 mm	28.575 mm	22.098 mm	Component
Heat Sinks Low Profile Heat Sink for All Metal-Case Power Semis for TO-3, 120.6x76.2x11.7mm 623A Wakefield Thermal 1: Rp199.971 227In Stock	Mfr. Part No. 623A Mouser Part No 567-623A	Wakefield Thermal	Heat Sinks Low Profile Heat Sink for All Metal-Case Power Semis for TO-3, 120.6x76.2x11.7mm	Datasheet	227In Stock	Rp199.971 Rp184.377 Rp175.571 Rp168.967 View Rp161.078 Rp154.290 Rp149.520 Rp144.200	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Screw	Aluminum	Rectangular Fin	1.5 C/W	76.2 mm	120.65 mm	11.7 mm	Component
Heat Sinks Diamond Shaped, Basket Heat Sink for TO-3, Horizontal, 8.4 Degree C/W, 25.4mm 501503B00000G Aavid 1: Rp36.509 4.898In Stock	Mfr. Part No. 501503B00000G Mouser Part No 532-501503B00	Aavid	Heat Sinks Diamond Shaped, Basket Heat Sink for TO-3, Horizontal, 8.4 Degree C/W, 25.4mm	Datasheet	4.898In Stock	Rp36.509 Rp33.573 Rp32.656 Rp31.739 View Rp30.087 Rp28.253 Rp26.602 Rp25.134 Rp23.666	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Screw	Aluminum	Straight Fin	8.4 C/W	47.752 mm	35.56 mm	25.4 mm	Component
Heat Sinks Heat Sink for TO3, 120.7x140.2x66.7mm, (1) TO3 Mounting Hole Pattern 423A Wakefield Thermal 1: Rp512.771 34In Stock	Mfr. Part No. 423A Mouser Part No 567-423-A	Wakefield Thermal	Heat Sinks Heat Sink for TO3, 120.7x140.2x66.7mm, (1) TO3 Mounting Hole Pattern	Datasheet	34In Stock	Rp512.771 Rp462.503 Rp446.909 Rp406.180 View Rp382.331 Rp373.891	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Screw	Aluminum	Extruded Axial Fin	0.96 C/W	139.7 mm	120.65 mm	66.67 mm	Component
Heat Sinks Basket Heat Sink for TO-3, Slanted Fin, Horizontal, 7.2 Degree C/W, 12.7mm 500103B00000G Aavid 1: Rp63.661 2.831In Stock	Mfr. Part No. 500103B00000G Mouser Part No 532-500103B00	Aavid	Heat Sinks Basket Heat Sink for TO-3, Slanted Fin, Horizontal, 7.2 Degree C/W, 12.7mm	Datasheet	2.831In Stock	Rp63.661 Rp59.074 Rp57.606 Rp54.304 View Rp51.185 Rp47.700 Rp46.232 Rp44.030	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Screw	Aluminum		7.2 C/W	45.97 mm	45.97 mm	12.7 mm	Component
Heat Sinks Double-Surface Heat Sink for TO3, V Hole Pattern, 120.7mm 401V Wakefield Thermal 1: Rp190.615 108In Stock	Mfr. Part No. 401V Mouser Part No 567-401V	Wakefield Thermal	Heat Sinks Double-Surface Heat Sink for TO3, V Hole Pattern, 120.7mm	Datasheet	108In Stock	Rp190.615 Rp186.579 Rp186.395	Min.: 1 Mult.: 1	Heat Sinks	TO-3		Aluminum	Extruded Radial Fin	1.5 C/W	38.1 mm	120.65 mm	31.75 mm	Component
Heat Sinks Maximum Efficiency, Omnidirectional Heat Sink for TO-3, 25.4mm Height 680-10A Wakefield Thermal 1: Rp271.154 93In Stock	Mfr. Part No. 680-10A Mouser Part No 567-680-10A	Wakefield Thermal	Heat Sinks Maximum Efficiency, Omnidirectional Heat Sink for TO-3, 25.4mm Height	Datasheet	93In Stock	Rp271.154 Rp252.808 Rp229.325 Rp229.142 View Rp196.119 Rp190.982	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Through Hole	Aluminum	Omnidirectional Fin	2 C/W	46 mm	46 mm	25.4 mm	Component
Heat Sinks Double-Surface Heat Sink for TO-3 Case, 120.7x76.2x31.8mm, 6.9mm Dia. Mount Hole 403F Wakefield Thermal 1: Rp369.855 90In Stock	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	90In Stock	Rp369.855 Rp327.660 Rp316.102 Rp301.975 View Rp301.792 Quote	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Through Hole	Aluminum	Extruded Radial Fin	0.9 C/W	111.1 mm	76.2 mm	31.8 mm	Component
Heat Sinks Low Profile Heat Sink for All Metal-Case Power Semis for TO-3, 120.6x38.1x11.7mm 621A Wakefield Thermal 1: Rp97.234 301In Stock	Mfr. Part No. 621A Mouser Part No 567-621A	Wakefield Thermal	Heat Sinks Low Profile Heat Sink for All Metal-Case Power Semis for TO-3, 120.6x38.1x11.7mm	Datasheet	301In Stock	Rp97.234 Rp92.280 Rp89.895 Rp84.759 View Rp79.805 Rp74.668 Rp72.100 Rp67.330 Rp67.146	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Screw	Aluminum	Rectangular Fin	2 C/W	120.6 mm	38.1 mm	11.7 mm	Component
Heat Sinks Heatsink, T03 HS01 Apex Microtechnology 1: Rp463.053 256In Stock 666Expected 16/11/2026	Mfr. Part No. HS01 Mouser Part No 137-HS01	Apex Microtechnology	Heat Sinks Heatsink, T03	Datasheet	256In Stock 666Expected 16/11/2026	Rp463.053 Rp437.369 Rp411.684 Rp386.000 View Rp360.132 Rp341.236 Rp330.962 Quote	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Chassis	Aluminum	Straight Fin	11.6 C/W	1.6 in	1 in	1 in	Component
Heat Sinks Heatsink, T03 HS02 Apex Microtechnology 1: Rp547.995 313In Stock 285On Order	Mfr. Part No. HS02 Mouser Part No 137-HS02	Apex Microtechnology	Heat Sinks Heatsink, T03	Datasheet	313In Stock 285On Order On Order Ship Dates Mfr. No: HS02 Stock: 313 Can Dispatch Immediately On Order: 9 Expected 26/10/2026 276 Expected 16/11/2026 Factory Lead Time: 16 Weeks	Rp547.995 Rp496.993 Rp465.988 Rp445.074 View Rp428.929 Rp408.565 Rp399.576 Quote	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Chassis	Aluminum	Vertical Fin	4.5 C/W	1.81 in	1.81 in	1.5 in	Component
Heat Sinks Heatsink, T03 HS13 Apex Microtechnology 1: Rp2.238.946 43In Stock	Mfr. Part No. HS13 Mouser Part No 137-HS13	Apex Microtechnology	Heat Sinks Heatsink, T03	Datasheet	43In Stock	Rp2.238.946 Rp2.080.253 Rp1.987.239 Rp1.872.026 View Rp1.803.228 Quote	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Chassis	Aluminum	Straight Fin	1.48 C/W	5.5 in	4.812 in	1.312 in	Component
Heat Sinks Heatsink, T03 HS14 Apex Microtechnology 1: Rp1.412.642 29In Stock	Mfr. Part No. HS14 Mouser Part No 137-HS14	Apex Microtechnology	Heat Sinks Heatsink, T03	Datasheet	29In Stock	Rp1.412.642 Rp1.279.817 Rp1.194.325 Rp1.151.762 View Rp1.109.383 Quote	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Chassis	Aluminum	Straight Fin	2 C/W	4.406 in	3 in	1.312 in	Component
Heat Sinks BGA Heat Sink, High Performance, Stamped, No TIM, TO-3, 45.21x45.21x30.99mm ATS-PCBT1088 Advanced Thermal Solutions 1: Rp86.043 85In Stock	Mfr. Part No. ATS-PCBT1088 Mouser Part No 984-ATS-PCBT1088	Advanced Thermal Solutions	Heat Sinks BGA Heat Sink, High Performance, Stamped, No TIM, TO-3, 45.21x45.21x30.99mm	Datasheet	85In Stock	Rp86.043 Rp77.053 Rp73.384 Rp70.816 View Rp68.064 Rp64.211 Rp61.643 Rp59.991 Rp59.074	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Screw	Aluminum	Straight Fin	6 C/W	45.21 mm	45.21 mm	30.99 mm	Component
Heat Sinks Heatsink, T03, PDIP, Pwr Pkg, H2O-cooled HS11 Apex Microtechnology 1: Rp7.376.009 2In Stock	Mfr. Part No. HS11 Mouser Part No 137-HS11	Apex Microtechnology	Heat Sinks Heatsink, T03, PDIP, Pwr Pkg, H2O-cooled	Datasheet	2In Stock	Rp7.376.009 Rp6.796.276 Rp6.310.841	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Chassis	Aluminum	Straight Fin	0.1 C/W	8 in	6 in	2 mm	Component
Heat Sinks Hat Section Heat Sink for TO-3, Horizontal, Black Anodized, 50.8x44.45x9.52mm 506007B00000G Aavid 1: Rp35.958 5.024In Stock	Mfr. Part No. 506007B00000G Mouser Part No 532-506007B00	Aavid	Heat Sinks Hat Section Heat Sink for TO-3, Horizontal, Black Anodized, 50.8x44.45x9.52mm	Datasheet	5.024In Stock	Rp35.958 Rp32.656 Rp31.555 Rp30.454 View Rp30.271 Rp27.886	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Screw	Aluminum	Channel Cut Fin	7 C/W	50.8 mm	44.45 mm	9.525 mm	Component
Heat Sinks Diamond Shaped, Basket Heat Sink for TO-3, Horizontal, 12 Degree C/W, 12.7mm 501303B00000G Aavid 1: Rp31.922 7.553In Stock	Mfr. Part No. 501303B00000G Mouser Part No 532-501303B00	Aavid	Heat Sinks Diamond Shaped, Basket Heat Sink for TO-3, Horizontal, 12 Degree C/W, 12.7mm	Datasheet	7.553In Stock	Rp31.922 Rp31.005 Rp29.537 Rp24.033 View Rp23.850 Rp19.997	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Screw	Aluminum	Straight Fin	12 C/W	47.752 mm	35.56 mm	12.7 mm	Component
Heat Sinks Diamond Shaped, Basket Heat Sink for TO-3, Horizontal, 10 Degree C/W, 19.05mm 501403B00000G Aavid 1: Rp57.606 1.236In Stock	Mfr. Part No. 501403B00000G Mouser Part No 532-501403B00	Aavid	Heat Sinks Diamond Shaped, Basket Heat Sink for TO-3, Horizontal, 10 Degree C/W, 19.05mm	Datasheet	1.236In Stock	Rp57.606 Rp51.002 Rp50.085 Rp48.617 View Rp46.599 Rp44.397 Rp34.490	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Screw	Aluminum	Straight Fin	10 C/W	47.752 mm	35.56 mm	19.05 mm	Component
Heat Sinks Diamond Shaped, Basket Heat Sink for TO-3, Horizontal, 7.4 Degree C/W, 25mm PF527G Aavid 1: Rp309.314 266In Stock	Mfr. Part No. PF527G Mouser Part No 532-PF-527	Aavid	Heat Sinks Diamond Shaped, Basket Heat Sink for TO-3, Horizontal, 7.4 Degree C/W, 25mm	Datasheet	266In Stock	Rp309.314 Rp288.399 Rp273.539 Rp261.431 View Rp261.247 Rp234.278 Quote	Min.: 1 Mult.: 1	Heat Sinks	TO-3		Aluminum						Component
Heat Sinks Maximum Efficiency, Omnidirectional Heat Sink for TO-3, 31.8mm Height 680-125A Wakefield Thermal 1: Rp318.670 210In Stock 750Expected 11/12/2026	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	210In Stock 750Expected 11/12/2026	Rp318.670 Rp307.479 Rp271.337 Rp256.294 Rp221.436	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Through Hole	Aluminum	Omnidirectional Fin	1.5 C/W	46 mm	46 mm	31.75 mm	Component
Heat Sinks Highest Efficiency/Lowest Unit Cost Heat Sink for TO-3, 33.3mm Height 690-3B Wakefield Thermal 1: Rp57.240 2.034In Stock	Mfr. Part No. 690-3B Mouser Part No 567-690-3B	Wakefield Thermal	Heat Sinks Highest Efficiency/Lowest Unit Cost Heat Sink for TO-3, 33.3mm Height Learn More about Wakefield Thermal wakefield vette 690 extruded heat sinks	Datasheet	2.034In Stock	Rp57.240 Rp53.754 Rp49.718 Rp45.315 View Rp43.113 Rp32.289	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Through Hole	Aluminum	Omnidirectional Fin	2 C/W	47.24 mm	47.24 mm	33.27 mm	Component
Heat Sinks Heat Sink for TO3, 120.7x76.2x66.7mm, (1) TO3 Mounting Hole Pattern 421A Wakefield Thermal 1: Rp480.849 67In Stock	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	67In Stock	Rp480.849 Rp451.495 Rp411.317 Rp381.413 View Rp366.370 Rp350.042 Rp346.923 Quote	Min.: 1 Mult.: 1	Heat Sinks	TO-3	Screw	Aluminum	Extruded Axial Fin	0.7 C/W	76.2 mm	120.65 mm	66.67 mm	Component