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Tflex HD300

Silicone based Thermal Gap Filler

Product Description

Laird Tflex HD300 is a 2.7 W/mK gap filling material in our high deflection line of products. Tflex HD300 is an excellent choice when wide manufacturing tolerances occur. These variable gaps can be filled with Tflex HD300 while generating minimal board and component stress. Laird's unique manufacturing capabilities, filler and resin knowledge result in this unique product designed with customer applications in mind. Tflex HD300 is provided in thickness from .5mm (.020"") up to 5mm (.200"") in .5mm (.020"") increments as standard. Non-standard increments of .25mm (.010"") are available if required, please contact Laird for information and pricing. In addition, Laird can provide Tflex HD300 in multiple converted formats through approved converters and distribution networks. Also, if your application requires, we can deliver sheets of material as large as 460mm (18"") X 460mm (18"").

Features and Benefits
  • Low pressure versus deflection characteristics
  • Excellent surface wetting for low contact resistance
  • Minimizes board and component stress.
  • Large tolerance applications
  • RoHS and REACH compliant


Automated PackagingAutomated Pad Placement
Custom AutomationCustom Product Development

Automotive ADASAutomotive Electronics
Automotive InfotainmentAutomotive Powertrain/ECUs
Drones/SatellitesGaming Systems
InstrumentationNotebooks/Tablets/Portable Devices
RoutersSmart Home Devices
Wireless infrastructure

Technical Specification

Density (g/cc)3.10
Dielectric Constant6.60
Hardness (Shore 00)38
Operating Temperature Max (Celsius)200
Operating Temperature Min (Celsius)-40
Outgassing CVCM (%)0.100
Outgassing TML (%)0.390
Shelf Life2 years from Date of Shipment
Thermal Conductivity (W/mK)2.70
Thermal Resistance @10 psi Max (C-in2/W)1.054
Thermal Resistance @10 psi Min (C-in2/W)0.411
Thermal Resistance @30 psi Max (C-in2/W)0.711
Thermal Resistance @30 psi Min (C-in2/W)0.348
Thermal Resistance @50 psi Max (C-in2/W)0.564
Thermal Resistance @50 psi Min (C-in2/W)0.297
Thickness Max (inches)0.200
Thickness Max (mm)5.08
Thickness Min (inches)0.010
Thickness Min (mm)0.25
UL Flammability RatingV-0
Volume Resistivity1.20 x10^14 Ohm-cm
Parts (20)
↑ click on headings to sort ↓
Part NumberPart NameThermal Conductivity (W/mK)Thickness(inches)Thickness (mm)Hardness (Shore 00)Operating Temperature Max (Celsius)Operating Temperature Min (Celsius)Dielectric ConstantColor
A17156-02Tflex HD320 18x18in2.700.0200.5138200-406.60Pink
A17156-04Tflex HD340 18x18in2.700.0401.0238200-406.60Pink
A17156-06Tflex HD360 18x18in2.700.0601.5238200-406.60Pink
A17156-08Tflex HD380 18x18in2.700.0802.0338200-406.60Pink
A17156-10Tflex HD3100 18x18in2.700.1002.5438200-406.60Pink
A17156-12Tflex HD3120 18x18in2.700.1203.0538200-406.60Pink
A17156-14Tflex HD3140 18x18in2.700.1403.5638200-406.60Pink
A17156-16Tflex HD3160 18x18in2.700.1604.0638200-406.60Pink
A17156-18Tflex HD3180 18x18in2.700.1804.5738200-406.60Pink
A17156-20Tflex HD3200 18x18in2.700.2005.0838200-406.60Pink
A17633-02Tflex HD320 9x9IN,2.700.0200.5138200-406.60Pink
A17633-04Tflex HD340 9x9IN,2.700.0401.0238200-406.60Pink
A17633-06Tflex HD360 9x9IN,2.700.0601.5238200-406.60Pink
A17633-08Tflex HD380 9x9IN,2.700.0802.0338200-406.60Pink
A17633-10Tflex HD3100 9x9IN,2.700.0100.2538200-406.60Pink
A17633-12Tflex HD3120 9x9IN,2.700.1203.0538200-406.60Pink
A17633-14Tflex HD3140 9x9IN,2.700.1403.5638200-406.60Pink
A17633-16Tflex HD3160 9x9IN,2.700.1604.0638200-406.60Pink
A17633-18Tflex HD3180 9x9IN,2.700.1804.5738200-406.60Pink
A17633-20Tflex HD3200 9x9IN,2.700.2005.0838200-406.60Pink

Company Address

Techni3 Ltd

Unit 4B Caerphilly Business Park


CF83 3GS

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