R2V-CT2-38E Datasheet, PDF (1/2 Pages) Ohmite Mfg. Co. – R2 Series For TO-220 and TO-247

HEATSINK
R2 Series
For TO-220 and TO-247
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.
F E AT U R E S
• 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
S E R I E S S P E CI F IC A T I O N S
Heatsink
Part Number
R2V-CT2-38E
R2A-CT2-38E
R2V-CT4-38E
R2A-CT4-38E
*Free convection at 15W
Surface
Area
(in²/mm²)
21 / 13,579
21 / 13,579
21 / 13,579
21 / 13,579
Weight
(oz/g)
5.9/26
5.9/26
6.4 / 29
6.4 / 29
Thermal
Resistance*
(°C/W)
9.8
8.6
9.8
8.6
c h ara c ter i st i c s
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
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