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R2 Series Datasheet

For TO-247 and TO-264

R2 Series product image

Ohmite’s R2 Series (patent pending) heatsink provides a large surface area along with our C Series clipping mechanism to attach to a TO-247 or TO-264 package. The self-aligning features of the clip assure secure attachment and enhanced thermal performance. 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 mounting 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

Specifications

Surface Area (in^2/mm^2):

21 / 13,579

Weight (oz/g):

0.92 / 26

Thermal Resistance* (°C/W):

9.8

Surface Area (in^2/mm^2):

21 / 13,579

Weight (oz/g):

0.92 / 26

Thermal Resistance* (°C/W):

8.6

Surface Area (in^2/mm^2):

21 / 13,579

Weight (oz/g):

1.02 / 29

Thermal Resistance* (°C/W):

9.8

Surface Area (in^2/mm^2):

21 / 13,579

Weight (oz/g):

0.92 / 26

Thermal Resistance* (°C/W):

8.6

Surface Area (in^2/mm^2):

21 / 13,579

Weight (oz/g):

1.02 / 29

Thermal Resistance* (°C/W):

9.8

Surface Area (in^2/mm^2):

21 / 13,579

Weight (oz/g):

1.02 / 29

Thermal Resistance* (°C/W):

8.6

*Free convection at 15W

X = Discontinued

Characteristics

Aluminum Alloy 6063-T5 or Equivalent with either degreased or black anodized finish

Music Wire, Per ASTM A228 with bright nickel plating

Cold-rolled Steel, Per ASTM A-366 with pure tin over copper strike. RoHS compliant

for improvement, use thermal joint compound, 0.005 Grafoil (TGon 800 by Laird), or phase change material (Hi-Flow by Bergquist)

(Optional) Sil-Pad 900-S, K6 800-S and K10

Heat Dissipation

TO-247 with no thermal interface material

R2 Series Heat Dissipation chart

Dimensions

R2 Series Dimensions

Ordering Information

R2 Series Ordering Info

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