EPO-TEK® 354-2 High Temperature Epoxy, Heat Cure (4g)

The EPO-TEK^® 354-2 High-Temperature Optical Epoxy is a two-component, high Tg epoxy designed for semiconductor packaging in medical, fiber optic, and optoelectronic assemblies. It provides electrical and thermal insulation. Recommended Cure: 150°C for 1 Hour (302°F).

Physical Properties:

• Color (Before Cure):
  • Part A: Clear/Colorless
  • Part B: Dark Amber
• Consistency: Pourable liquid
• Viscosity (23°C) @ 20 rpm: 7,415 cPs
• Glass Transition Temperature (Tg): 123°C (degree Celsius); 253.4°F (degree Fahrenheit)
• Shore D Hardness: 83
• Coefficient of Thermal Expansion (CTE):
  • Below Tg: 80.8 × 10⁻⁶ in/in °C
  • Above Tg: 297.4 × 10⁻⁶ in/in °C
• Suggested Operating Temperature: < 300°C (Intermittent); < 572°F

Electrical and Thermal Properties:

• Thermal Conductivity: N/A
• Volume Resistivity @ 23°C: ≥1 x 10¹⁶ Ohm-cm
• Dielectric Constant (1KHz): 3.21
• Dissipation Factor (1KHz): 0.005

Optical Properties @ 23°C (73.4°F):

• Spectral Transmission: >95% @ 600-1200 nm
• Refractive Index: 1.5759 nm

See Datasheet for additional properties and application notes