CR Series Heatsink with universal cam-clip FEATURES Minimum assembly cost and labor: Spring Clips make the mounting holes, fasteners, tools and fix- tures obsolete in assembly operations & reduce costs. Maximum Repeatability: Constant spring force over repeated assembly/disassembly Ohmite introduces the CR-series, configurable and Maximum Reliability: Resilient spring action locks patented (Pat. Pending) high performance, heatsinks electronic component in place. Fewer parts in with universal cam-clip for TO-247, TO-264, and assembly and no fasteners and washers required. other packages. This proprietary heat sink provides Prevent short circuit by eliminating metal particles tool and fixture free assembly operation with its Pat generated from hardware or thread tapping Pending cam clip system. The CR series heatsinks Design Flexibility: Maximum flexibility for dynamic are comparable to some AAVID popular MAX-clip device locations and power up grading. Configure- heat sinks in footprint and thermal performance. It is to-Fit gives designers total freedom to configure the ideal type of heat sink for high power density and heat sink needed to fit their dynamic design envi- small size electronic packaging with forced convec ronments. tion cooling. SERiES SPECiFiCATiONS ChARACTERiSTiCS Surface Thermal Heat Sink Aluminum Alloy 6063-T5 or Equivalent Heatsink Area Weight Length Resistance* with either degreased or black anod- 2 2 Part Number (in /mm ) (oz/g) (mm) (C/W) ized finish. CR101-25 20 / 12,785 1.0 / 28 25 7.6 Spring Clip Music Wire, Per ASTM A228 with CR101-50 40 / 25,570 2.0 / 57 50 5.3 bright nickel plating CR101-75 60 / 38,355 3.0 / 85 75 4.2 Solder Foot Cold-rolled Steel, Per ASTM A-366 CR201-25 36.8 / 23,705 1.8 / 52 25 4.7 with pure tin over copper strike. RoHS compliant. CR201-50 73.5 / 47,409 3.6 /103 50 3.3 CR201-75 110 / 71,114 5.4 /155 75 2.6 (Optional) Sil-Pad 900-S, K6 800-S Insulator and K10 CR301-25 19.5 / 12,595 1.38 /39 25 8.1 CR301-50 39.0 / 25,189 2.75 /78 50 5.7 CR301-75 58.5 / 37,784 4.12/117 75 4.5 Thermal Performance CR401-25 31.7 / 20,477 2.26/63.5 25 5.4 2.75 CR401-50 63.5 / 40,954 4.48/127 50 3.8 2.5 CR401-75 95.2 / 61,431 6.74/191 75 3.0 2.25 *Natural convection thermal resistance based on 70 C Temp rise above ambient. 2.0 1.75 hOw TO ORdER 1.5 CR101 RoHS Compliant CR301 1.25 1.0 CR101-25-AE CLA-TO-21E 0.75 Series Extrusion style Length (mm) Coating CR401 Cam Clip 101, 201,301,401 25, 50, 75 A = Anodized ordered separately CR201 0.5 V = degreased 0.25 0 200 400 600 800 1000 1200 Air Velocity (ft./min.) Two TO-247 heat sources uniformly spaced on the heat Sink, L= 1.97 50mm and total of 10W Power Dissipation (continued) 178 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info ohmite.com Thermal Resistance (C/W)0.43 (10.9mm) CR Series Heatsink with universal cam-clip dimENSiONS 1.06 (27.0mm) Y X 0.105 (2.67mm) 1.06 0.18 CR201 (27.0mm) (4.5mm) 0.67 1.97 1.34 (17.0mm) (50mm) (34mm) 0.55 M3 2x 0.08 0.98 (13.995mm) (2.0mm) (25mm) L 0.89 (22.5mm) Y X 0.105 0.24 (2.67mm) 0.18 (6.025mm) (4.55mm) 2.95 (75mm) 0.19 1.34 (4.95mm) CR101 (34mm) 0.91 1.19 (23.2mm) (30.2mm) 1.1 (27.7mm) 2x 0.08 (2.0mm) L 0.19 0.23 (5.778mm) (4.95mm) 1.18 (30mm) M4X0.7 Y X 0.105 (2.67mm) CR401 CR301 0.157 1.18 (4.0mm) 1.57 (30mm) (40mm) 2.36 0.59 0.11 (60mm) M3 (2.79mm) (15mm) 0.24 2x 0.08 (6mm) (2.0mm) 0.98 L (25mm) 1.18 (30mm) 1.08 (27.5mm) 2.95 Y X 0.105 (75mm) (2.67mm) 0.32 (8mm) 0.157 (4.0mm) 1.18 0.98 1.57 (30mm) (25mm) 0.75 (40mm) 1.08 Clip (19.1mm) (27.5mm) 0.197 0.57 (5.0mm) 0.79 (14.5mm) (20mm) 0.39 (10mm) 0.197 0.19 (5.0mm) (4.8mm) 2x 0.08 L 0.78 (2.0mm) (19.8mm) 1.39 (35.3mm) rev 2/18-1 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info ohmite.com 179
