Flexible ceramic thermal conductive and isolating film Softtherm U 281 is especially designed for silicone sensitive applications and is an alternative material to the silicone based Softtherm films. The U 281 film has excellent electrical isolation and a very good thermal conductivity.

Possible Thickness:
U 281: 0.5mm – 2.0mm

Applications

• Properties
• Graphs

• Property	Symbol	Unit	Softtherm U 281
  * – Youngs Modulus sample size 30x30x2.5mm3;- variable contact pressure;- compression 50% of measured thickness;
  Color			gray
  Thermal Properties
  Thermal Resistance	Rth	K/W	0.60
  Thermal Impedance	Rti	°Cmm²/W Kin²/W	240 0.37
  Thermal Conductivity	λ	W/mK	2.0
  Electrical Properties
  Breakdown Voltage	Ud;ac	kV	7.0
  Dielectric Breakdown	Ed;ac	kV/mm	14
  Volume Resistivity		Ωcm	5.3×109
  Dielectric Loss Factor	tan δ	1	7.8×10-2
  Dielectric Constant	εr	1	5.6
  Mechanical Properties
  Measured Thickness	(±10%)	mm	0.5
  Hardness		Shore A	55 – 65
  Youngs Modulus*		N/cm²	244
  Physical Properties
  Application Temperature		°C	-40 to +130
  Assembling			single-layer w/o fiberglass
  Density	ρ	g/cm³	1.5
  Total Mass Loss	TML	Ma.-%	< 0.9
  Flame Class		UL	94V-0

•