G5 / G9 Glass Melamine Laminate Sheet
High-strength, arc-resistant sheet for switchgear parts. Glass melamine (G5/G9) sheet brings high mechanical strength and arc resistance to switchgear parts that see load and clearing energy. We machine it to plate, barrier and structural shape with faces finished for assembly. Both are glass melamine; grade is set by temperature class and availability. We specify from service.
Technical specifications
| Material | Glass-melamine (G5/G9) |
| Property | High mechanical, arc resistant |
| Use | Switchgear parts |
| Standard | ASTM D7049 (melamine), IEC 60269 (fuse dimensions), UL 94 V-0. |
| Operating temperature | -40 °C to +130 °C (arc-facing up to 155 °C) |
| Dielectric strength | ≥ 20 kV/mm (per ASTM test method) |
💾 Datasheets & Test Reports
Download the technical data sheet for this product (PDF).
Applications by industry
- Arc-chute and arc-barrier sheets in switchgear
- MV breaker tray and interphase barrier plates
- High-temperature transformer insulating plates
- Motor slot wedges and insulation sheets
- Arc-resistive covers in fuse and MCC compartments
- Shaped laminate parts requiring arc resilience and mechanical strength
Why glass melamine laminate for this application
Glass-melamine (G5 mechanical / G9 electrical, and 3233) is the sheet grade chosen where a flat barrier may see arc splatter or heat while still needing structural stiffness in distribution gear.
Hygroscopic when left unwrapped. Confirm G5 vs G9 vs 3233 against the mechanical and tracking duty; not a general-purpose cosmetic laminate.
Standards: ASTM D709, IEC 60893, UL 94 V-0.
Feature and remaining-wall review
CNC turning and milling for precise dimensions; brittle material requires sharp, low-speed tools. Feature depth, edge distance and remaining wall are checked against the critical geometries before G5 / G9 Glass Melamine Laminate Sheet is quoted, and capability is confirmed on your drawing rather than a blanket tolerance.
Inspection and traceability
We state the control plan with you. Batch traceability links raw material lot to finished part.
- First-article inspection (FAI) per your plan
- In-process dimensional checks at every station
- Batch certificate of conformance (COA) supplied on request
- Lot traceability to incoming material certificate
- Dielectric strength and insulation resistance testing available on request
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Common questions
Where would you specify G5 / G9 Glass Melamine Laminate Sheet?
Typical applications are switchgear parts. Give us the duty plus the environment, and we will either confirm this grade for G5 / G9 Glass Melamine Laminate Sheet or point you at the one that fits.
Which material is G5 / G9 Glass Melamine Laminate Sheet manufactured from?
The material is Glass-melamine (G5/G9). Alternate grades can be quoted against your drawing.
Is a material certificate of analysis provided for G5 / G9 Glass Melamine Laminate Sheet?
Each batch of G5 / G9 Glass Melamine Laminate Sheet is traceable through its material certificate of analysis. First-article reports and dielectric testing are performed to your named method.
Can G5 / G9 Glass Melamine Laminate Sheet be produced to a customer drawing?
Thickness and sheet size are supplied to your drawing. Sizes are quoted against your drawing and the quantity you plan to run.
Engineering Guides & Selection Notes
Related reading on the selection and specification decisions behind G5 / G9 Glass Melamine Laminate Sheet.
Get pricing for G5 / G9 Glass Melamine Laminate Sheet
Send the drawing for G5 / G9 Glass Melamine Laminate Sheet with your annual volume. We check the material against the duty and tolerance on it, verify ID, OD, wall and features, then come back with manufacturability notes and pricing for G5 / G9 Glass Melamine Laminate Sheet.