QSIL 553 – 250g Twin Pack | CHTCustom pads and gaskets priced instantly and made to order within 24 hours!

QSIL 553 – 250g Twin Pack | CHT

2-Part Encapsulation and Potting Silicone

£58.50

  • Thermal Conductivity = 0.18 W/mK
  • Hardness Shore A = 40
  • Dielectric Constant = 2.69
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SKU: 94241 Categories: , Brand:

Description

QSIL 553 is a 2-component, silicone elastomer system specially designed for electronic potting and encapsulation applications. It offers good protection against chemicals, environmental contamination, mechanical shock, vibration and impact damage. It can be employed in areas where low flammability is a prerequisite. The cured elastomer can be repaired. The component parts have relatively low viscosities and are readily mixed either by hand or machine.

Benefits

  • Thermal Conductivity = ~0.68 W/mK
  • Hardness Shore A = 45
  • Dielectric Constant = 3.08

Features

  • 100% solids – no solvents
  • Long pot life
  • Low modulus and good elongation
  • UL94 V0 listed in file No. E205830

Recommended Uses

  • Electrical insulator, application cars e.g. encapsulation of ABS control unit.

Uncured Product

Property Test Method Value
Cure Profile – 15 mins at 150°C
Cure Type – Addition
De-mould Time / Full Cure at
23°C/73°F		 – 24 hr hrs
Density A BS ISO 2781 1.63
Density B BS ISO 2781 1.63
Mix Ratio By Weight – 1:1
Pot Life mins at 23°C/73°F – 100 mins
Rheology – Liquid
Viscosity Mixed Brookfield 6000 cP

Cured Product

 

Property Test Method Value
Color – Gray
Elongation at Break ISO 37 240%
Hardness Shore A ASTM D 2240-95 45
Linear Coefficient of Thermal
Expansion (ppm/°C)		 – 317 ppm/°C
Max Working Temp – 240 °C / 464 °F
Min Working Temp – -55 °C / -67 °F
Tear Resistance (N/mm) BS ISO 34-1 7.8 N/mm / 45 ppi
Tensile Strength ISO 37 1.72 N/mm2 / 249 psi
Thermal Conductivity – ~0.68 W/mK
UL File No. – E205830

Electrical Properties

Property Test Method Value
Comparative Tracking Index
(volts)		 – 600 volts
Dielectric Constant ASTM D-150 3.08
Dielectric Strength (V/mil) – 500 V/mil
Dissipation Factor ASTM D-150 0.009
Volume Resistivity (Ohms
cm)		 ASTM D-257 402000000000000 ohms
cm

Storage

Property Test Method Value
Max Storage Temperature – 38 °C / 100 °F
Shelf Life – 24 months

CHT QSIL 553 Technical Datasheet





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