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SARCON®’s versatility in thermal management applications is doubly enhanced by way of the variety of end-use configurations possible, and the many standard material formulations available in each.

The silicone rubber based materials offer other useful elements such as electrical insulation, protective coverings and gasketing as integral features in most designs.

Along with a few simple recommendations to help in obtaining the optimum performance for your application, a few suggestions are included which may help you to take advantage of some of these other features.

1. THERMAL TRANSFER

a.) Consider the most efficient SARCON® materials regarding thermal conductivity. See charts on pages 16 and 17.

b.) Take advantage of the heat transfer characteristics of any nearby sheet metal components by using the SARCON® component as a thermally conductive bridge from the heat generating component to the sheet metal. See drawing at left.

2. DUAL FUNCTIONALITY

a.) Use the SARCON® component also as a functional gasket, seal cushion, insulator or protective cover. See sketch at left for seal cushion application

b.) Vibration dampening and environmental sealing against outside contaminants can be included in the design elements.

c.) Choose from many related product configurations shown on pages 18 to 33.

d.) Custom shapes can be arranged if your design requires a specific treatment.

3. DETERMINE EXTERIOR DIMENSIONS

a.) No special preparations are necessary to attach the SARCON® component

b.) Some of the most common alternatives include:
pressure sensitive adhesive
silicone adhesive
mechanical clamping
hardware attachment - screws, rivets
self-adhering silicone gel

c.) Consider using the self-adhering SARCON® Gap Filler Pads shown on pages 18 to 28 of the catalog product section.

d.) Note also that SARCON® is very elastic, providing a very tight fit over uneven surfaces. This eliminates the need for gap-filling agents in order to achieve high rates of thermal dissipation without variation. The sleeves and cases shown on page 31 of the catalog can be designed as an interference fit which can slip snugly over appropriately configured components.

4. CLAMPING TORQUE

a.) Clamping torque of the installed SARCON® material will decrease the thermal resistance as the torque is increased.

See the chart below for specific measurements of each type of SARCON® material.

b.) Test method: Fujipoly Test Method FTM P-3010 (ASTM D5470 Equivalent)

  Thermal Resistance at Various Forces
SARCON® Type 3kg•cm 5 kg•cm 7 kg•cm
TR 30T 0.65 0.62 0.59
45T 0.76 0.73 0.71
85T 1.37 1.35 1.32
HR 30H 0.44 0.42 0.39
45H 0.54 0.52 0.51
85H 0.73 0.76 0.74
UR 30U 0.30 0.26 0.25
45U 0.38 0.35 0.33
85U 0.62 0.56 0.52
QR 30Q 0.61 0.57 0.52
45Q 0.83 0.77 0.71
85Q 1.42 1.25 1.18
  Thermal Resistance at Various Forces
SARCON® Type 3kg•cm 5 kg•cm 7 kg•cm
GTR 15GTR 0.58 0.51 0.50
20GTR 0.60 0.56 0.54
30GTR 0.68 0.66 0.64
GHR 15GHR 0.58 0.55 0.53
20GHR 0.61 0.57 0.54
30GHR 0.67 0.61 0.59
GSR 20GSR 0.31 0.30 0.30
30GSR 0.37 0.34 0.33
45GSR 0.40 0.39 0.37
85GSR 0.52 0.51 0.50

5. SARCON® SILICONE PUTTY

a.) Clamping torque of the installed SARCON® material will decrease the thermal resistance as the torque is increased.
See the chart below for specific measurements of each type of SARCON® material.

b.) Test method: Fujipoly Test Method FTM P-3010 (ASTM D5470 Equivalent)

c.) Calculate size and volume to be used as follows:
Example:

√ V ÷ thickness

Compressed thickness: 0.2mm
Component size: 15mm x 15mm

V = 0.2 x 15 x 15
V = 45mm3
√ 45mm3 ÷ 2.0mm original thickness

4.74mm (Use 5.0mm x 5.0mm) @ 2.0mm thickness