Momentive YG6111 650g Thermally Conductive Silicone Grease for Heat Sink, Semiconductor and Electronic Components

Momentive YG6111 Thermal Grease 650g is a white thermally conductive silicone oil compound designed to improve heat transfer between electronic components and heat sinks. Its combination of silicone oil and high-purity metal oxide fillers provides reliable thermal conduction, electrical insulation and excellent workability for semiconductor devices, power electronics and industrial heat-dissipation applications.

Product Overview

Momentive YG6111 is a thermally conductive dielectric silicone compound developed for electronic and electrical heat-management applications.

The material does not function as a structural adhesive and does not cure into a hard solid. Instead, it remains in a grease-like state and fills microscopic gaps between a heat-generating component and its heat sink or metal mounting surface.

Air has very poor thermal conductivity. By replacing trapped air in surface irregularities with YG6111 thermal compound, heat can transfer more efficiently from electronic devices into the cooling structure.

Momentive YG6111 Thermal Grease 650g is particularly suitable for industrial electronics, power modules, semiconductors and other components that generate significant heat during operation.

Key Features and Advantages

Excellent Thermal Conductivity

YG6111 has a typical thermal conductivity of approximately 0.84 W/m·K.

The metal-oxide-filled formulation helps transfer heat efficiently between electronic components and heat sinks, supporting lower operating temperatures and improved equipment reliability.

Wide Operating Temperature Range

The recommended operating temperature range is approximately -50°C to +200°C.

This allows YG6111 to maintain useful thermal performance in electronic equipment exposed to both low-temperature and high-temperature operating environments.

Low Oil Separation

Momentive YG6111 Thermal Grease 650g has very low oil bleed.

Typical oil separation is approximately 0.4% after 24 hours at 150°C, helping the compound remain stable during elevated-temperature service.

Low Volatility

Typical heating weight loss is approximately 0.1% after 24 hours at 150°C.

Low volatility helps reduce material loss and supports long-term use in thermal interfaces.

Electrical Insulation

YG6111 is a dielectric thermal compound rather than an electrically conductive paste.

Its typical volume resistivity is approximately 2 × 10¹⁴ Ω·cm, allowing the material to provide thermal conduction while maintaining electrical insulating properties.

Excellent Workability

YG6111 has a smooth, homogeneous grease consistency and a typical worked penetration of approximately 310.

Its good handling characteristics make manual application as well as automated dispensing easier in industrial production.

Reduced Low-Molecular-Weight Siloxanes

Momentive’s Japanese product data lists approximately 100 ppm of low-molecular-weight siloxanes in the D3-D10 range.

This characteristic is particularly useful for electrical and electronic component applications where control of volatile silicone species is important.

Applications

Semiconductor Devices

Momentive YG6111 Thermal Grease 650g can be applied between semiconductor packages and heat sinks to improve thermal transfer.

Power Transistors

The compound is suitable for power transistors and other heat-generating electronic devices mounted onto metal cooling structures.

Power Modules and Rectifiers

YG6111 can be used for power modules, diodes, rectifiers and similar electronic assemblies requiring efficient heat dissipation.

Heat Sink Interfaces

The material fills microscopic surface irregularities between a component and a heat sink, reducing thermal resistance caused by trapped air.

Electronic Equipment

YG6111 is suitable for electrical and electronic equipment, control systems, industrial electronics and other heat-producing components.

Automatic Dispensing

Its good workability makes the compound suitable for selected automated dispensing and production-line applications.

Material Compatibility

Momentive product data reports no cracking or discoloration in compatibility tests involving:

ABS
PBT
PPS
Polycarbonate
Nylon 66
NBR

Actual compatibility should still be verified under the final production conditions.

Technical Information

Brand: Momentive

Model: YG6111

Product Type: Thermally Conductive Silicone Oil Compound

Form: Silicone Grease / Thermal Compound

Color: White

Net Content: 650g

Appearance: White Grease-Like Compound

Specific Gravity at 25°C: Approx. 2.45

Worked Penetration: Approx. 310

Thermal Conductivity: Approx. 0.84 W/m·K

Oil Bleed at 150°C / 24h: Approx. 0.4%

Heating Weight Loss at 150°C / 24h: Approx. 0.1%

Volume Resistivity: Approx. 2 × 10¹⁴ Ω·cm

Dielectric Constant at 60Hz: Approx. 5.0

Dissipation Factor at 60Hz: Approx. 0.006

Low Molecular Siloxanes D3-D10: Approx. 100 ppm

Operating Temperature Range: Approx. -50°C to +200°C

Primary Function: Heat Transfer / Thermal Interface

Curing: Non-Curing

Electrical Property: Dielectric / Electrically Insulating

Why Choose Momentive YG6111 Thermal Grease 650g

Momentive YG6111 Thermal Grease 650g provides a practical combination of thermal conductivity, electrical insulation, low oil separation and wide-temperature performance.

Unlike curing thermal adhesives, YG6111 remains grease-like and allows components to be serviced or removed more easily when necessary.

Its good dispensing characteristics also make it suitable for both maintenance applications and industrial production processes.

For heat sinks, semiconductor devices, power modules, transistors, rectifiers and other heat-generating electronic equipment, YG6111 provides a proven silicone-based thermal interface solution.

Related Links

FUJI Product Page:
https://www.hk-fuji.com/product/momentive-yg6111-thermal-grease-650g/

Momentive Official Website:
https://www.momentive.com/