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. 707-3355
Mfr. Part No.SPK6-0.006-00-54
BrandBergquist
$0.836
Each (In a Pack of 10)
units
19.05 x 12.7mm 0.152mm 19.05mm 12.7mm - 1.1W/m·K Thin Film Polyimide - -60°C +180°C Shore A 90 Sil-Pad K6 - -60 → +180 °C
RS Stock No. 446-493
Mfr. Part No.U021041-15-U1
$13.73
Each
units
100 x 100mm 2mm 100mm 100mm - 1.2W/m·K Ceramic Filled Silicone Rubber Yes -40°C +160°C Shore OO 27 - - -40 → +160 °C
RS Stock No. 169-2183
Mfr. Part No.SP400-0.007-00-05
BrandBergquist
$0.642
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. 122-5183
Mfr. Part No.ILA-TIM-LES09-1A
$3.723
Each (In a Pack of 4)
units
13.5 x 13.5mm 0.25mm 13.5mm 13.5mm - - Graphite Yes - - - TIM Pewter -
RS Stock No. 794-3973
BrandRS PRO
$19.89
Each
units
150 x 150mm 0.16mm 150mm 150mm - 10W/m·K Graphite Yes -50°C +150°C Shore A 80 - Black -50 → +150 °C
RS Stock No. 707-4578
BrandRS PRO
$27.56
Each
units
150 x 150mm 1mm 150mm 150mm - 1.6W/m·K - Yes -40°C +200°C Shore A 15 - Grey -40 → +200 °C
RS Stock No. 794-3995
BrandRS PRO
$15.57
Each
units
150 x 150mm 0.8mm 150mm 150mm - 8W/m·K Graphite - -50°C +150°C Shore A 80 - Black -50 → +150 °C
RS Stock No. 707-3373
Mfr. Part No.SPK10-0.006-00-104
BrandBergquist
$1.412
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 - -60°C +180°C Shore A 90 Sil-Pad K10 - -60 → +180 °C
RS Stock No. 283-3830
Mfr. Part No.SL-012-AL-20
BrandSilfox
$3.088
Each (In a Pack of 10)
units
23 x 20mm 2mm 23mm 20mm - 20W/m·K Ceramic Aluminium Oxide - - +1400°C - - - Maximum of +1400 °C
RS Stock No. 362-9676
Mfr. Part No.HF625-0.005-AC-104
BrandBergquist
$1.812
Each (In a Pack of 50)
units
25 x 19mm 0.127mm 25mm 19mm - 0.5W/m·K Hi-Flow 625 Yes -30°C +150°C - Hi-Flow 625 - -30 → +150 °C
RS Stock No. 446-475
Mfr. Part No.U021041-26-U1
$23.73
Each
units
100 x 100mm 1mm 100mm 100mm - 6W/m·K Boron Nitride Filled Silicone Elastomer - -45°C +200°C Shore OO 70 - - -45 → +200 °C
RS Stock No. 758-0963
BrandRS PRO
$9.046
Each (In a Pack of 5)
units
65.2 x 47.5mm 0.2mm 65.2mm 47.5mm - 1.8W/m·K - - -45°C +200°C - - Red -45 → +200 °C
RS Stock No. 507-5605
Mfr. Part No.SP400-0.007-00-1212
BrandBergquist
$33.56
Each
units
12 x 12in 0.178mm 12in 12in - 0.9W/m·K Fibreglass - -60°C +180°C Shore A 85 Sil-Pad 400 - -60 → +180 °C
RS Stock No. 362-9654
Mfr. Part No.HF625-0.005-AC-54
BrandBergquist
$1.407
Each (In a Pack of 50)
units
19.05 x 12.7mm 0.127mm - - - 0.5W/m·K Hi-Flow 625 Yes -30°C +150°C - Hi-Flow 625 - -30 → +150 °C
RS Stock No. 468-2296
Mfr. Part No.GPVOUS-0.125-00-00-100X100
BrandBergquist
$94.83
Each
units
100 x 100mm 0.125in 100mm 100mm - 1W/m·K Gap Pad VO Ultra Soft - -60°C +200°C Shore OO 5 Gap Pad VO Ultra Soft - -60 → +200 °C
RS Stock No. 707-3361
Mfr. Part No.SPK10-0.006-00-54
BrandBergquist
$0.817
Each (In a Pack of 10)
units
19.05 x 12.7mm 0.152mm 19.05mm 12.7mm - 1.3W/m·K Thin Film Polyimide - -60°C +180°C Shore A 90 Sil-Pad K10 - -60 → +180 °C
RS Stock No. 169-2470
Mfr. Part No.QII-0.006-AC-1212
BrandBergquist
$127.25
Each
units
12 x 12in 0.152mm 12in 12in - 2.5W/m·K Q-Pad II Yes -60°C +180°C Shore A 93 Q-Pad II - -60 → +180 °C
RS Stock No. 498-0225
Mfr. Part No.ST-08-220R/A
BrandBergquist
$0.461
Each (In a Pack of 10)
units
25 x 11mm 0.45mm 25mm 115mm - 0.8W/m·K Silicone - - - - - - -
RS Stock No. 707-3428
Mfr. Part No.GP5000S35-0.040-02-0404
BrandBergquist
$68.60
Each
units
4 x 4in 0.04in 4in 4in - 5W/m·K Gap Pad 5000S35 Yes -60°C +200°C Shore OO 35 Gap Pad 5000S35 - -60 → +200 °C
RS Stock No. 794-3998
BrandRS PRO
$17.27
Each
units
150 x 150mm 0.8mm 150mm 150mm - 13W/m·K Graphite - -50°C +150°C Shore A 80 - Black -50 → +150 °C