EPO-TEK® H20E

Epo-Tek® H20E is a two component, 100% solid silver-filled epoxy system, silver-resin paste and liquid hardener, mixing ration is 1:1.

  • Epo-Tek H22E features high thermal conductivity, and is very well suited for extensive high temperature applications (300-400°C)
  • Epo-Tek H20E is also a conductive adhesive of choice for old or new applications
  • Its applications include: chip bonding and electronic bonding as well as SEM mounting
  • H20E contains no solvents and will not outgas
  • When cured, H20E isl resistant to solvents, resin and moisture
  • Long Pot life (2½ days)
  • Shelf life is one year when store at 23°C

Maximum Bond Line Cure Schedule:

175°C 45 seconds
150°C 5 minutes
120°C 15 minutes
80°C 3 hours

Typical properties: (to be used as a guide only, not a specification)

Physical Properties
Color: Part A: silver; Part B: silver
Consistency: Smooth, thixotropic paste
Viscosity (@ 100 RPM / 23°C): 2,200-3,200 cPs
Thixotropic Index: 3.69
Glass Transition Temp (Tg): ≥80°C (Dynamic cure 20 – 200°C / ISO 25 Min; Ramp -10 to 200°C @ 20°C/Min)
Coefficient of Thermal Expansion (CTE): Below Tg: 31 x 10-6 in/in/°C
Above Tg: 158 x 10-6 in/in/°C
Shore D hardness: 75
Lap Shear Strength @ 23°C: 1,475 psi
Die Shear Strength @ 23°C: >5 kg / 1,700 psi
Degradation Temp (TGA): 425°C
Weight Loss: @ 200°C: 0.59%
@ 300°C: 1.67%
@ 250°C: 1.09%
Operating Temp: Continuous: -55°C to 200°C
Intermittent: -55°C to 300°C
Storage Modulus @ 23°C: 808, 700 psi
Ion: Cl- 73 ppm
Na+ 2 ppm
NH4+ 98 ppm
K+ 3 ppm
Particle Size: ≤45 microns
Electrical Properties:
Volume Resistivity @ 23°C: ≤0.0004 Ohm-cm
Thermal Properties
Thermal Conductivity: 2.50 W/mK
  29 W/mK, Based on Thermal Resistance Data: R = L x K-1 x A-1
Thermal Resistance: (Junction to Case): TO-18 package with nickel-gold metalized 20 x 20 mil chips and bonded with Epo-Tek H20E (2 mil thick)
Epo-Tek®H20E: 6.7 to 7.0°C/W
Solder: 4.0 to 5.0°C/W
Cat # Description MSDS Pack Price Quote Quantity
Cat #: 12671-20E Description: Epo-Tek® H20E  Adhesive Pack: 1 oz Price: $344.50 Add to Quote: