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TFO-D-SI Silikonfolie glasfaserverstärkt

TFO-D-SI is an electrically insulating thermally conductive silicone foil for an optimised thermal coupling between electronic packages and heat sinks. Through the specific formulation and filling with thermally conductive ceramic particles a high thermal conductivity is reached. Under pressure the total thermal resistance is minimised. The material is characterised by its very high dielectric properties. The fibreglass reinforcement provides for an outstanding mechanic stability and cut-through resistance as well as easy handling. For an easy and reliable pre-assembly the interface material is available with self tackiness on one side with no need for an additional adhesive coating or with a one side adhesive coating.


  • Thermal conductivity: 1.2 W/mK
  • High thermal contact
  • Outstanding mechanic stability through fibreglass reinforcement
  • Very high dielectric strength
  • Extraordinary chemical resistance and longterm stability
  • Residue-free removal after use


  • Sheet 300 x 1000 mm
  • Roll 300 mm x 50 m
  • Non tacky (TFO-DXXX-SI)
  • Self tacky on one side without adhesive coating (TFO-DXXX-SI-AO)
  • One side adhesive (TFO-DXXX-SI-A1)
  • Die cut parts
  • Kiss cut parts on roll
  • Kiss cut parts on sheet


Thermal link of:

  • MOSFETs or IGBTs
  • Power diodes or AC/DC converters
  • Power modules

For use in Switch mode power supplies / Motor control units / Automotive engine management systems / UPS units / Solar systems


MaterialCeramic filled siliconeCeramic filled siliconeCeramic filled silicone
Tensile Strength1MPa352820
UL FlammabilityUL 94VOVOVO
RoHS Conformity2015 / 863 / EUYesYesYes
Resistances2 @ 150 PSI°C-inch²/W0,550,751,25
Resistance2 @ 30 PSI°C-inch²/W0,791,051,55
Thermal ConductivityW/mK1,21,21,2
Operating Temperature Range°C- 50 bis + 180- 50 bis + 180- 50 bis + 180
Breakdown Voltage3kV AC5,5> 6,0> 6,0
Volume ResistivityOhm - cm> 1,0 x 1011> 1,0 x 1011> 1,0 x 1011
Dielectric Constant@ 1 MHz6,06,06,0