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178

Surface

Thermal

Heatsink

Area

Weight

Resistance*

Part Number

(oz/g)

(°C/W)

R2V-CT2-38E

21 / 13,579

0.92 / 26

9.8

R2A-CT2-38E

21 / 13,579

0.92 / 26

8.6

R2V-CT4-38E

21 / 13,579

1.02 / 29

9.8

R2A-CT4-38E

21 / 13,579

1.02 / 29

8.6

R2V-CT6-38E

21 / 13,579

1.02 / 29

9.8

R2A-CT6-38E

21 / 13,579

1.02 / 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 to a TO-220, 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.

FEA TURES

•

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, TO-247, and TO-264

ch ARA c TER i ST ic 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)

Insulato

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

SER i ES SPE ci F ic AT i ONS

(continued)