Thermal Pads

Thermal pads or thermal gap pads are materials that provide a thermal interface between heatsinks (devices or substances for absorbing unwanted or excess heat) and electronic devices. A thermal pad is particularly useful where air gaps, rough surface textures or uneven surface topography prevent the use of traditional grease or paste. Pads are often self adhesive and  less messy and easier to install than thermal paste.

RS Components have an extensive range of products designed for the heating or cooling of electronic devices to help maintain the right temperature in order to work effectively.

How do thermal pads work?

By keeping the internal components of electronic products from wear and tear resulting from high circuit board temperatures, thermal pads help to provide extended longevity. They are also important in providing safety by eliminating the possibility of electrical fires. Thermal pads become soft at high temperatures which means they can fill imperfections in the surface for better conduction qualities and to minimise potential damage to components. They are manufactured in a variety of standard thicknesses and dimensions but can also be custom fabricated to fit various applications.,/p>

Typical Applications

Thermal pads and thermal paste both work in the same way by transferring heat from hot areas of a circuit board into a heatsink. They are often used on the following to provide better heat transfer.

  • Flat panel displays
  • LED (light emitting diode) displays
  • Engine control units
  • Computer hard drives, CPU
  • Wireless communication hardware

Does thermal pad thickness matter?

A greater thickness allows the pad to absorb more deformations in the heatsink surface . However a thicker thermal pad is worse in regarding to heat transfer.

Can you reuse thermal pads?

Unlike thermal paste, thermal pads can be reused so long as the pad is clean and has not been moved, touched, damaged or stretched.


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Description Price Dimensions Thickness Length Width Diameter Thermal Conductivity Material Self-Adhesive Minimum Operating Temperature Maximum Operating Temperature Hardness Material Trade Name Colour Operating Temperature Range
RS Stock No. 707-4764
BrandRS PRO
$86.50
Each
units
150 x 150mm 0.5mm 150mm 150mm - 6W/m·K Gel - -45°C +200°C Shore OO 50 - Red -45 → +200 °C
RS Stock No. 915-6089
BrandRS PRO
$204.19
Each
units
150 x 150mm 2mm 150mm 150mm - 8W/m·K Silicone - -55°C +200°C Shore OO 60 - Grey -55 → +200 °C
RS Stock No. 915-6098
BrandRS PRO
$42.86
Each
units
150 x 150mm 0.5mm 150mm 150mm - 4W/m·K Non-Silicone - -40°C +125°C Shore OO 30 - Blue -40 → +125 °C
RS Stock No. 169-4656
Mfr. Part No.SPK10-0.006-AC-104
BrandBergquist
$3.526
Each (In a Pack of 10)
units
25.4 x 19.05mm 0.152mm 25.4mm 19.05mm - 1.3W/m·K Thin Film Polyimide Yes -60°C +180°C Shore A 90 Sil-Pad K10 - -60 → +180 °C
RS Stock No. 758-0948
BrandRS PRO
$4.18
Each (In a Pack of 10)
units
49.1 x 29.7mm 0.2mm 49.1mm 29.7mm - 1.8W/m·K - - -45°C +200°C - - Red -45 → +200 °C
RS Stock No. 880-1949
Mfr. Part No.ILA-TIM-STRIP-0150X20-1A.
$4.18
Each (In a Pack of 4)
units
- 0.25mm - - - 5 (Z-axis) W/m·K, 240 (XY-axis) W/m·K Graphite Yes -240°C +300°C Shore A 85 TIM Pewter -240 → +300 °C
RS Stock No. 177-7818
Mfr. Part No.SL-012-AL40
BrandSilfox
$3.672
Each (In a Pack of 10)
units
23 x 20mm 4mm 23mm 20mm - 20W/m·K Ceramic Aluminium Oxide - - +1400°C - - - Maximum of +1400 °C
RS Stock No. 758-0941
BrandRS PRO
$2.06
Each (In a Pack of 10)
units
28 x 27.3mm 0.2mm 28mm 27.3mm - 1.8W/m·K - - -45°C +200°C - - Red -45 → +200 °C
RS Stock No. 367-3178
Mfr. Part No.GPVOUS-0.020-AC-00-200X100
BrandBergquist
$96.80
Each
units
200 x 100mm 0.02in 200mm 100mm - 1W/m·K Gap Pad VO Ultra Soft Yes -60°C +200°C Shore OO 5 Gap Pad VO Ultra Soft - -60 → +200 °C
RS Stock No. 707-4774
BrandRS PRO
$141.02
Each
units
150 x 150mm 0.5mm 150mm 150mm - 12W/m·K Gel - -45°C +200°C Shore OO 60 - Grey -45 → +200 °C
RS Stock No. 915-6039
BrandRS PRO
$30.43
Each
units
150 x 150mm 0.5mm 150mm 150mm - 3.5W/m·K Fibreglass - -55°C +200°C Shore OO 20 - Blue -55 → +200 °C
RS Stock No. 707-3364
Mfr. Part No.SPK6-0.006-00-104
BrandBergquist
$0.873
Each (In a Pack of 10)
units
25.4 x 19.05mm 0.152mm 25.4mm 19.05mm - 1.1W/m·K Thin Film Polyimide - -60°C +180°C Shore A 90 Sil-Pad K6 - -60 → +180 °C
RS Stock No. 707-4613
BrandRS PRO
$59.77
Each
units
150 x 150mm 2.5mm 150mm 150mm - 2.2W/m·K - Yes -40°C +200°C Shore A 10 - Red -40 → +200 °C
RS Stock No. 169-2183
Mfr. Part No.SP400-0.007-00-05
BrandBergquist
$0.69
Each (In a Pack of 50)
units
41.91 x 28.96mm 0.178mm 41.91mm 28.96mm - 0.9W/m·K Fibreglass - -60°C +180°C Shore A 85 Sil-Pad 400 - -60 → +180 °C
RS Stock No. 707-4685
BrandRS PRO
$83.84
Each
units
150 x 150mm 2mm 150mm 150mm - 4W/m·K - Yes -40°C +200°C Shore A 25 - Grey -40 → +200 °C
RS Stock No. 707-4572
BrandRS PRO
$31.27
Each
units
150 x 150mm 1.2mm 150mm 150mm - 1.6W/m·K - Yes -40°C +200°C Shore A 15 - Grey -40 → +200 °C
RS Stock No. 915-6032
BrandRS PRO
$37.31
Each
units
150 x 150mm 1mm 150mm 150mm - 3.5W/m·K Fibreglass - -55°C +200°C Shore OO 20 - Blue -55 → +200 °C
RS Stock No. 283-3717
Mfr. Part No.SPK10-0.006-AC-122
BrandBergquist
$4.385
Each (In a Pack of 10)
units
28.96 x 20.57mm 0.152mm 28.96mm 20.57mm - 1.3W/m·K Thin Film Polyimide Yes -60°C +180°C Shore A 90 Sil-Pad K10 - -60 → +180 °C
RS Stock No. 177-7723
Mfr. Part No.CPU PAD 35X35
BrandBergquist
$9.803
Each (In a Pack of 10)
units
35 x 35mm 0.127mm 35mm 35mm - 0.6W/m·K Acrylic Yes - - - - - -
RS Stock No. 177-7802
Mfr. Part No.SL-011-AL30
BrandSilfox
$5.355
Each (In a Pack of 10)
units
40 x 26.2mm 3mm 40mm 26.2mm - 20W/m·K Ceramic Aluminium Oxide - - +1400°C - - - Maximum of +1400 °C