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Thermally conductive silicone-based grease with non-curing, reworkable formulation.
Excellent thermal stability across a wide operating temperature range (–50 °C to +200 °C).
Low thermal resistance and high interfacial wetting for efficient heat transfer between components.
Electrically insulating—prevents short circuits while enabling reliable thermal management.
Non-toxic, RoHS-compliant, and halogen-free formulation suitable for demanding electronics environments.
Thermal interface material for CPUs, GPUs, and power semiconductors in computing and data center hardware.
Heat dissipation in LED lighting modules and drivers requiring long-term reliability under thermal cycling.
Cooling solutions for automotive electronics, including ADAS control units and power inverters.
Thermal management in industrial power supplies and motor drives exposed to vibration and temperature extremes.
| Chemical Type | Dimethyl silicone oil with thermally conductive ceramic fillers |
| Product Form | Off-white, viscous paste |
| Appearance | Homogeneous, non-separating grease |
| Primary Applications | Thermal interface material for heat sinks, microprocessors, and power devices |
| Key Features | Non-curing, reworkable, electrically insulating, low volatility |
| Benefits | Reduces junction temperature, extends component lifetime, simplifies assembly and rework |
| RoHS Compliance | Compliant (Directive 2011/65/EU) |
| Halogen Content | Halogen-free (per IEC 61249-2-21) |
Q1: What is the primary function of DOWSIL 340 in thermal management applications?
A: DOWSIL 340 is a thermally conductive silicone-based grease formulated to enhance heat transfer between electronic components—such as CPUs, GPUs, or power modules—and heat sinks by filling microscopic air gaps and surface irregularities at the interface.
Q2: Is DOWSIL 340 electrically insulating?
A: Yes, DOWSIL 340 maintains excellent electrical insulation properties while providing high thermal conductivity, making it suitable for use in sensitive electronics where dielectric integrity is critical.
Q3: How does DOWSIL 340 perform under long-term thermal cycling?
A: It exhibits strong resistance to pump-out and phase separation during repeated thermal cycling, retaining consistent thermal performance and interfacial adhesion across typical operating temperature ranges for power electronics and LED systems.
Q4: Can DOWSIL 340 be used with aluminum, copper, and nickel-plated heat sink surfaces?
A: Yes, it is chemically compatible with common heat sink materials including aluminum, copper, and nickel-plated surfaces, and does not promote corrosion under normal service conditions.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
