R2V-CT2-38E OHMITE | Alldatasheet

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Technical content

1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com2 Surface Thermal Heatsink Area Weight Resistance* Part Number (in 2/mm2) (oz/g) (°C/W) R2V-CT2-38E 21 / 13,579 5.9/26 9.8 R2A-CT2-38E 21 / 13,579 5.9/26 8.6 R2V-CT4-38E 21 / 13,579 6.4 / 29 9.8 R2A-CT4-38E 21 / 13,579 6.4 / 29 8.6 *Free convection at 15W Ohmite’s R2 Series (patent pending) heatsink pro- vides a large surface area along with our C Series clipping mechanism to attach either a TO-220 or TO-247 package. The self-aligning features of the clip assure secure attachment and enhanced thermal per- formance. Because no screws are required for device mounting, additional fins can be added to the rear side of the heatsink for increased total surface area in a more compact space.

FEATURES

  • Reduced Assembly Cost: C Series camming clips make fasteners and fixtures obsolete, along with stray metal filings from tapped holes.
  • Maximum Repeatability: clamping force of the clip is not degraded by repeated loading and unloading.
  • Maximum Heat Transfer per Unit Space: maximum surface area per unit volume and consistent mount- ing force reduces thermal resistance
  • Maximum Resistance to Shock and Vibration: light weight, resilient clips lock the component in place and are highly resistant to shock and vibration
  • Maximum Reliability: helps prevent short circuits by eliminating metal particles from thread tapping
  • RoHS compliant R2 Series For TO-220 and TO-247 chARAcTERiSTicS 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 compli- ant Interface Thermal Resistance for improvement, use thermal joint compound, 0.005 Grafoil (TGon 800 by Laird), or phase change material (Hi-Flow by Bergquist) Insulator (Optional) Sil-Pad 900-S, K6 800-S and K10 SERiES SPEciFicATiONS THERMAL MANAGEMENT HEATSINK

1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com3 hEAT DiSSiPATiON R2 Series For TO-220 and TO-247 DimENSiONS hOw TO ORDER THERMAL MANAGEMENT HEATSINK TO-247 with no thermal interface material 300100 200 600400 500 900700 800 Heat Dissipated (watts) 420 1086 16 181412 100 120 140 160 0 1000 Air Velocity (ft./min.) 2.5 1.5 0.5 3.5 Thermal Resistance Case to Ambient (°C/W) Case Temp Rise Above Ambient in Free Air (°C) ø0.05" typ. (1.3mm) 2x ø0.08" (2.0mm) 1.38" (35.2mm) 0.80" (20.3mm) 0.18" (4.6mm) 0.87" (22.0mm) 1.5" (38.0mm) 0.16" (4.25mm) 0.39" (10.0mm) CT2: 0.55" (14mm) CT4: 0.71" (18mm) R2V-CT2-38E Series Clip C = camming clip Height (mm) Finish A = black anodized V = degreased Package T2 = TO220 T4 = TO247 RoHS Compliant