1.0 W/mK Thermal Conductive Silicone Grease Non-Curing Insulating Thermal Paste for Power Transistor Cooling

HN100 is a single-component, non-curing thermally conductive silicone grease designed for reliable heat transfer between heat-generating components and their heat sinks. It keeps a stable paste consistency from −50 °C to +200 °C, combines excellent electrical insulation with 1.0 ± 0.1 W/m·K thermal conductivity, and delivers near-zero free radical content with resistance to water, ozone and weathering. The compound is non-toxic, odourless, non-corrosive and fully RoHS 2.0 compliant.

• Thermal conductivity: 1.0 ± 0.1 W/m·K (ASTM D5470)
• Non-curing formula: maintains paste consistency indefinitely, no hardening or drying out
• Wide operating range: −50 °C to +200 °C, no powdering after 8 days at 200 °C
• Electrical insulation: breakdown voltage 2450 V/mm at 0.20 mm thickness
• Low oil separation: ≤ 0.3% and low volatility ≤ 0.6% at 200 °C / 24 h
• Excellent workability: suitable for brushing, rolling, automatic dispensing and screen printing
• Stable chemistry: near-zero free radical content, resistant to water, ozone and weathering
• Compliance: RoHS 2.0, non-toxic, odourless and non-corrosive

HN100 is formulated for thermal management across a wide range of electronic and electrical assemblies:

• Microwave communication equipment: surface coating and full encapsulation of microwave devices, microwave communication systems, microwave transmission equipment and regulated power supplies
• Power semiconductors: thermal interface for power transistors, thyristors, power modules, IGBT assemblies and heating elements
• Computing and consumer electronics: CPU assemblies, GPU heat sinks, graphics cards, notebooks and printer heads
• Sensing devices: thermistors, temperature sensors and thermal coupling of sensor housings
• Automotive electronics: automotive electronic control units, automotive refrigerators and in-vehicle power modules
• Power supply and lighting: regulated power supplies, power supply modules, LED lighting fixtures and LED driver heat sinks
• General heat dissipation: heat sinks, heat strips, housings and other components requiring efficient heat transfer

All values are measured under standard conditions and are for reference only. Actual thermal performance may vary with application conditions, bond line thickness (BLT) and contact pressure.

1. Surface preparation: clean all contact surfaces with a solvent to remove grease, dust and oxidation; ensure surfaces are completely dry.
2. Application: apply the grease directly by brushing, rolling, automatic dispensing or screen printing.
3. Spreading: transfer a small amount with a clean razor blade, plastic spatula or clean knife and spread evenly to the desired thickness.
4. Thickness control: the thinner the layer, the better the heat transfer. Remove excess material from the edges with a lint-free cloth.
5. Assembly: assemble the heat sink or heat source immediately and torque fasteners to specification to obtain a proper bond line thickness.

Q1: What is the thermal conductivity of HN100 thermal conductive silicone grease?
A: HN100 has a thermal conductivity of 1.0 ± 0.1 W/m·K measured by ASTM D5470. Its specific gravity is 1.85 ± 0.08 g/cm³ at 25 °C and cone penetration is 370 ± 20 (1/10 mm), giving a smooth, easily spreadable paste for thin bond lines.

Q2: Does HN100 thermal grease cure, dry out or harden over time?
A: No. HN100 is a single-component, non-curing silicone grease. It keeps its paste consistency indefinitely, shows no powdering after 8 days continuous baking at 200 °C and no drying after 3 hours at 280 °C, with oil separation ≤ 0.3% and volatility ≤ 0.6% at 200 °C for 24 hours.

Q3: Is HN100 electrically insulating and safe for sensitive electronics?
A: Yes. HN100 provides excellent electrical insulation with a breakdown voltage of 2450 V/mm at 0.20 mm thickness (IEC 60243). It is non-toxic, odourless, non-corrosive and RoHS 2.0 compliant, making it suitable for power supplies, sensors and microwave communication equipment.

Q4: Which applications and industries is HN100 thermal grease suitable for?
A: HN100 is used for power transistors, thyristors, power modules, CPU and GPU heat sinks, thermistors and temperature sensors, automotive electronics and refrigerators, printer heads, LED lighting fixtures, regulated power supplies, microwave devices and microwave transmission equipment, and general heat sink or housing thermal management.

Q5: How should HN100 be applied, packaged and stored?
A: Apply by brushing, rolling, automatic dispensing or screen printing after cleaning and drying the surfaces, then assemble the heat sink immediately. HN100 is supplied in 1 kg and 5 kg plastic drums with custom sizes on request, and has a 12-month shelf life when stored unopened below 27 °C in a cool, dry, well-ventilated area. Stir before use if slight oil separation occurs.

• Packaging: 1 kg plastic drum, 5 kg plastic drum; custom package sizes available upon request
• Storage: keep containers tightly sealed in a cool, dry, well-ventilated area away from direct sunlight; recommended below 27 °C
• Shelf life: 12 months from date of manufacture when stored unopened and properly sealed
• Transportation: classified as non-dangerous goods; handle with care to prevent leakage

We manufacture thermal conductive silicone materials with consistent batch quality, full TDS documentation and OEM/ODM support. Custom thermal conductivity, colour, viscosity and packaging can be produced against your specification, with technical samples available for evaluation.

Shenzhen Hanast New Material Co., Ltd. is a premier high-tech enterprise and leading source manufacturer specializing in the R&D, manufacturing, and global supply of industrial silicone materials. As a strategic branch of the renowned Shenzhen Kanglibang Technology Co., Ltd., Hanast integrates over a decade of chemical adhesive expertise with a cutting-edge 40,000-square-meter modern production base (including our newly expanding Jiangmen facility) to deliver high-capacity, reliable material solutions worldwide.

We serve as a vital tier-one supplier and OEM/ODM partner for global factories, procurement managers, and engineering teams across diverse sectors, including electric vehicles (EV), battery energy storage systems (BESS), solar inverters, LED lighting, and industrial automation.

Request a quotation or free sample today — tell us your application, bond line thickness and annual volume, and our technical team will recommend the right HN100 configuration for your project.