EPGC308 Epoxy Sheet Introduction, Applications, and Selection

EPGC308 Epoxy Sheet Introduction EPGC308 epoxy sheet is a laminate made of epoxy resin as a matrix and glass cloth a...

EPGC308 Epoxy Sheet Introduction

EPGC308 epoxy sheet is a laminate made of epoxy resin as a matrix and glass cloth as a reinforcement, produced through heat pressing under high temperature and high pressure. This material complies with IEC 60893 and is a Class H insulation material (heat resistance rating 180°C).

Key Features:

Excellent electrical properties (high insulation resistance, stable dielectric strength)

Excellent mechanical strength (pressure resistance, bending resistance, and impact resistance)

Good heat resistance (remains stable even at high temperatures)

Excellent dimensional stability (low water absorption, resists deformation)

EPGC308 Epoxy Sheet Applications

EPGC308 is widely used in motors, electrical appliances, power transmission and distribution equipment, and other fields. Typical applications include:

Motors and generators

Stator slot wedges, slot separators, end insulation rings, turn-to-turn insulation, phase separators

Various insulation supports and structural components

Transformers

Used as clamps, spacers, and insulation supports to enhance mechanical strength and heat resistance

Electrical equipment

Insulation separators and supports in high-voltage switchgear and circuit breakers

Busbar insulation supports

Other applications

Manufacturing structural components that withstand high mechanical and electrical stresses

Replacing traditional insulation materials (such as phenolic sheet) for applications requiring higher standards

Key Points for Selecting EPGC308 Epoxy Sheet

Selection Based on Operating Temperature

EPGC308 is H Class-A insulation (180°C). This model is preferred for applications with long-term temperatures of 150–180°C.

Select Based on Electrical Performance

Suitable for applications requiring high dielectric strength and low dielectric loss, such as high-voltage motors, generators, and large electrical equipment.

Select Based on Mechanical Strength

If components must withstand significant mechanical stress or vibration, EPGC308 offers superior bending and impact resistance, making it suitable for support components and fasteners.

Select Thickness Based on Application

Motor Slot Spacers: 0.3–2 mm
Phase Spacers and Insulation Rings: 3–10 mm
Structural Supports: ≥10 mm
Consider the Cost-Performance Balance
If only moderate heat resistance (e.g., 130–155°C) is required, more economical models such as EPGC202 and EPGC204 are recommended.

If the components are exposed to long-term high temperatures and high electrical stress, EPGC308 is the preferred choice.

Summary:

EPGC308 epoxy board is a high-performance insulating laminate widely used in motors, generators, transformers, and electrical equipment. It combines high heat resistance, high electrical insulation performance, and high mechanical strength. When selecting a board, consider the operating temperature, electrical strength, mechanical stress, and thickness requirements.