Electrical insulating plate 66255-00100-0288

Product Overview
The alumina ceramic heat sink insulator plate is manufactured from 96% high-purity alumina (Al₂O₃). It provides effective thermal conduction while ensuring electrical insulation between heat-generating components and metal heat sinks or surrounding structures. Its rigid plate form and compact dimensions make it suitable for constrained installation spaces and for applications requiring long-term stability under elevated temperatures.

Key Features

• 96% high-purity alumina (Al₂O₃) ceramic
• Combined thermal conduction and electrical insulation
• High dielectric strength and stable insulating performance
• Good thermal conductivity for efficient heat transfer
• Excellent resistance to high temperature and thermal aging
• Rigid plate structure suitable for precise positioning and assembly

Typical Applications

• Induction cookers and rice cookers
• Power semiconductor devices (MOSFETs, IGBTs)
• Heat sink insulation for electronic assemblies
• Household electronic appliances
• Power electronics and control modules

General Product Data
Formula: Al₂O₃
Forms: Plate
Materials: Alumina
Purity: 96%
CAS Number: 1344-28-1
Commodity: Ceramic thermal pads

Specifications / Tolerances (Plate)

• Length: 24 mm ±0.2 mm
• Width: 19 mm ±0.2 mm
• Thickness: 1 mm ±0.05 mm

Electrical Properties

• Dielectric constant (1 MHz, 25°C): 9.8
• Dielectric strength: 15 kV/mm
• Volume resistivity: 1e14 Ω·cm

Physical Properties

• Density: 3.7 g/cm³

Thermal Properties

• Thermal conductivity (20–400°C): 24 W/m·K
• Coefficient of thermal expansion: 6.9 ×10⁻⁶/°C (20–300°C); 7.8 ×10⁻⁶/°C (300–800°C)

Mechanical Properties

• Modulus of elasticity: 340 GPa