C Series F E AT U R E S TO-126, TO-247, TO-220 and TO-264 Package Heatsinks Ohmite introduces the C series (Pat. Pending). This series offers high performance, low cost and a compact heat sink with an integrated camming clip system for TO-126, TO-220, TO-247 and TO-264 devices. This powerful heat sink provides tool and fixture free assembly operation, largest surface areas and smallest space occupation. It is the ideal type of heat sink for high power density and small size (1U or 2U) electronic packaging with forced convection cooling. • Minimum assembly cost and labor Spring Clips make the mounting holes, fasteners, tools and fixtures obsolete in assembly operations & reduce costs. • Maximum Thermal Transfer Maximum surface area per unit volume, efficient cooling fins & consistent mounting force reduces thermal resistance. • Maximum Repeatability Constant spring force over repeated assembly/disassembly. • Maximum Reliability Resilient spring action locks electronic component in place. Fewer parts in assembly and no fasteners and washers required. Prevent short circuit by eliminating metal particles generated from hardware or thread tapping. • Design Flexibility Maximum flexibility for dynamic device locations and power upgrading. “Configureto-Fit” gives designers total freedom to configure heat sink needed to fit into a multitude design environments. S E R I E S S P E C I F I C AT I O N S Heatsink Part Number C247-025 C247-050 C247-075 C264-030 C264-058 C264-085 C220-025 C220-050 C220-075 C126-025 C126-040 C126-050 C126-075 c h aracter i st i cs Surface Area Weight Length “L” (in2/mm2) (oz/g) (mm) 11 / 7,312 0.5 / 15 25 23 / 14,858 1.1 / 31 50 34 / 21,655 1.6 / 45 75 13 / 8,774 0.7 / 19 30 25 / 16,963 1.35 / 37 58 37 / 24,861 1.97 / 54 85 11 / 7,312 0.5 / 15 25 23 / 14,858 1.1 / 31 50 34 / 21,655 1.6 / 45 75 10.2 / 6,559 0.45 / 12.7 25 16.3 / 10,495 0.72 / 20.3 40 20.4 / 13,119 0.90 / 25.4 50 30.6 / 21,655 1.35 / 38.1 75 Heat Sink Aluminum Alloy 6063-T5 or Equivalent with either degreased or black anodized finish. Spring Clip Music Wire, Per ASTM A228 with bright nickel plating Solder Foot Cold-rolled Steel, Per ASTM A-366 with pure tin over copper strike. RoHS compliant. Interface for improvement, use thermal joint Thermal compound, 0.005 Grafoil (TGon 800 Resistance by Laird), or phase change material (Hi-Flow by Bergquist) Insulator (Optional) Sil-Pad 900-S, K6 800-S and K10 by Bergquist Heat D i ss i pat i on Heat dissipation is the total for ALL DEVICES attached to heatsink. 800 C247-025-1AE (1 device) C247-050-2AE (2 devices) C247-075-3AE (3 devices) 100 8 7 6 80 5 60 4 3 40 2 20 1 0 0 168 1000 9 5 10 Heat Dissipated, total for ALL devices (watts) 0 15 200 38 Air Velocity (ft./min.) 600 400 800 1000 TO-126/CE-S102 (25mm long) one device w/Sil-pad 900s 36 12 34 10 32 30 8 28 6 26 24 22 4 2 3 4 5 6 7 8 Total Heat Dissipated (watts) 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • [email protected] 9 10 Avg. Thermal Resistance from Mounting Surface to Ambient (°C/watts) Air Velocity (ft./min.) 600 Average Heat Sink Temp. Rise above Ambient (°C) 120 400 Thermal Resistance from Mounting Case to Ambient (°C/watts) Case Temp. Rise above Ambient (°C) 200 140 (continued) C Series TO-126, TO-247, TO-220 and TO-264 Package Heatsinks d i m ens i ons 0.77" (19.6mm) with TO-126 0.806" with TO-247 or TO-264 (20.47mm) 0.73" (18.6mm) 0.785" with TO-220 (19.94mm) TO-247 0.71" (18mm) TO-126 & TO-220 0.57" (14.48mm) 1.50" (38mm) 1.12" (28.5mm) 1.28" (32.5mm) 0.73" (18.5mm) 0.10" (2.5mm) 0.100" (2.5mm) TO-264 0.35" (8.89mm) 0.10" (2.5mm) 0.100" (2.54mm) 0.385" (9.78mm) L-0.16" (4.06mm) (all models) 0.385" (9.78mm) 0.73" (18.54mm) 0.08" (2.08mm) (all models) Land Pattern X and Y dimensions at user discretion ø 0.07" pth typ (1.8mm) CL CL Y X ø 0.10" pth (2.5mm) TO-126 0.71" 0.73" (18.0mm) (18.6mm) 0.18" (4.6mm) L – 0.16"(4.06mm) L 0.08" (2.0mm) h o w to order RoHS Compliant C247-025-1AE Series Clip size Length (mm) No. of Finish clips A = black anodized V = degreased Standard part numbers No Finish (degreased) Black Anodized No. of Clips C247-025-1VE C247-050-2VE C247-075-3VE C247-025-1AE C247-050-2AE C247-075-3AE 1 2 3 C264-030-1VE C264-058-2VE C264-085-3VE C264-030-1AE C264-058-2AE C264-085-3AE 1 2 3 C220-025-1VE C220-050-2VE C220-075-3VE C220-025-1AE C220-050-2AE C220-075-3AE 1 2 3 C126-025-1VE C126-040-2VE C126-025-1AE C126-040-2AE 1 2 Packaging: Bulk 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • [email protected] 169