FEATURES C Series Minimum assembly cost and labor Spring Clips make the mounting holes, fasteners, tools and TO-126, TO-247, TO-220 fixtures obsolete in assembly operations & reduce and TO-264 Package Heatsinks costs. Maximum Thermal Transfer Maximum sur face 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 Ohmite introduces the C series (Pat. Pending). This electronic component in place. Fewer parts in series offers high performance, low cost and a assembly and no fasteners and washers required. compact heat sink with an integrated camming clip Prevent short circuit by eliminating metal particles system for TO-126, TO-220, TO-247 and TO-264 generated from hardware or thread tapping. devices. This powerful heat sink provides tool and fixture free assembly operation, largest surface areas Design Flexibility Maximum flexibility for dynamic and smallest space occupation. It is the ideal type of device locations and power upgrading. Configure- heat sink for high power density and small size (1U to-Fit gives designers total freedom to configure or 2U) electronic packaging with forced convection heat sink needed to fit into a multitude design envi- cooling. ronments. SERiES SPECiFiCATiONS ChARACTERiSTiCS Surface Aluminum Alloy 6063-T5 or Equivalent Heat Sink Heatsink Area Weight Length L 2 2 with either degreased or black anod- Part Number (in /mm ) (oz/g) (mm) ized finish. C247-025 11 / 7,312 0.5 / 15 25 C247-050 23 / 14,858 1.1 / 31 50 Spring Clip Music Wire, Per ASTM A228 with C247-075 34 / 21,655 1.6 / 45 75 bright nickel plating C264-030 13 / 8,774 0.7 / 19 30 Cold-rolled Steel, Per ASTM A-366 Solder Foot C264-058 25 / 16,963 1.35 / 37 58 with pure tin over copper strike. RoHS C264-085 37 / 24,861 1.97 / 54 85 compliant. C220-025 11 / 7,312 0.5 / 15 25 Interface for improvement, use thermal joint C220-050 23 / 14,858 1.1 / 31 50 Thermal compound, 0.005 Grafoil (TGon 800 C220-075 34 / 21,655 1.6 / 45 75 Resistance by Laird), or phase change material C126-025 10.2 / 6,559 0.45 / 12.7 25 (Hi-Flow by Bergquist) C126-040 16.3 / 10,495 0.72 / 20.3 40 (Optional) Sil-Pad 900-S, K6 800-S Insulator C126-050 20.4 / 13,119 0.90 / 25.4 50 and K10 by Bergquist C126-075 30.6 / 21,655 1.35 / 38.1 75 hEAT DiSSiPATiON Heat dissipation is the total for ALL DEVICES attached to heatsink. Air Velocity (ft./min.) Air Velocity (ft./min.) 200 400 600 800 1000 200 400 600 800 1000 140 9 38 C247-025-1AE (1 device) TO-126/CE-S102 (25mm long) 12 C247-050-2AE (2 devices) 8 one device w/Sil-pad 900s 36 120 C247-075-3AE (3 devices) 7 34 100 10 6 32 80 5 30 8 4 60 28 3 40 6 26 2 20 1 24 4 0 0 22 0 510 15 2 3 4 5 6 7 8 9 10 Heat Dissipated, total for ALL devices (watts) Total Heat Dissipated (watts) (continued) 166 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info ohmite.com Case Temp. Rise above Ambient (C) Thermal Resistance from Mounting Case to Ambient (C/watts) Average Heat Sink Temp. Rise above Ambient (C) Avg. Thermal Resistance from Mounting Surface to Ambient (C/watts)C Series TO-126, TO-247, TO-220 and TO-264 Package Heatsinks DimENSiONS 0.806 0.785 with TO-247 with TO-220 or TO-264 (19.94mm) TO-247 0.77 (20.47mm) 0.71 (19.6mm) (18mm) TO-126 & TO-220 0.73 with TO-126 (18.6mm) 0.57 (14.48mm) 1.28 1.50 (32.5mm) (38mm) TO-264 1.12 (28.5mm) 0.73 (18.5mm) 0.35 (8.89mm) 0.10 0.10 0.73 0.100 0.100 (2.5mm) (2.5mm) (18.54mm) L-0.16 (4.06mm) (2.5mm) (2.54mm) (all models) 0.08 0.385 0.385 (2.08mm) (9.78mm) (9.78mm) (all models) Land Pattern X and Y dimensions at user discretion 0.07 pth typ C C 0.10 pth L L (1.8mm) (2.5mm) Y X TO-126 0.71 0.73 (18.0mm)(18.6mm) 0.18 (4.6mm) L 0.16 (4.06mm) 0.08 (2.0mm) L hOw TO ORDER Standard part numbers RoHS Compliant No Finish (degreased) Black Anodized No. of Clips C247-025-1AE C247-025-1VE C247-025-1AE 1 Series Clip size Length No. of Finish C247-050-2VE C247-050-2AE 2 (mm) clips A = black anodized C247-075-3VE C247-075-3AE 3 V = degreased C264-030-1VE C264-030-1AE 1 C264-058-2VE C264-058-2AE 2 C264-085-3VE C264-085-3AE 3 C220-025-1VE C220-025-1AE 1 C220-050-2VE C220-050-2AE 2 C220-075-3VE C220-075-3AE 3 C126-025-1VE C126-025-1AE 1 Packaging: Bulk rev 2/19-1 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info ohmite.com 167