C Series FEATURES • Minimum assembly cost and labor Spring Clips TO-126, TO-247, TO-220 make the mounting holes, fasteners, tools and fixtures obsolete in assembly operations & reduce and TO-264 Package Heatsinks 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 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 Heatsink Area Weight Length “L” Heat Sink Aluminum Alloy 6063-T5 or Equivalent Part Number (in2/mm2) (oz/g) (mm) with either degreased or black anod- C247-025 11 / 7,312 0.5 / 15 25 ized finish. 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 Solder Foot Cold-rolled Steel, Per ASTM A-366 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 Insulator (Optional) Sil-Pad 900-S, K6 800-S 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 140 9 200 400 600 800 1000 38 Case Temp. Rise above Ambient (C)°116422800000000 CCC222444777---000257505---123AAAEEE (((123 dddeeevvviiiccceee)ss)) 564210387 Thermal Resistance from MountingCase to Ambient (C/watts)° Average Heat Sink Temp. Rise above Ambient (C)°3222332308466224 ToOne-1 d2e6v/CicEe- Sw1/S02il -(p2a5dm 9m0 0losng) 68411 20Avg. Thermal Resistance from MountingSurface to Ambient (C/watts)° 0 5 10 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 • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com

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" 1.28" 1.50" (14.48mm) (32.5mm) (38mm) 1.12" TO-264 0.73" (28.5mm) (18.5mm) 0.35" (8.89mm) 0.10" 0.10" 0.73" (2.5mm) 0.100" (2.5mm) 0.100" L-0.16" (4.06mm) (18.54mm) (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 ø 0.07" pth typ C L C L ø 0.10" pth (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" L (2.0mm) hOw TO ORDER Standard part numbers RoHS Compliant No Finish (degreased) Black Anodized No. of Clips C 2 4 7 - 0 2 5 - 1 A E 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 • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 167