G5/G9 Glass Melamine Tube
G5/G9 glass melamine tube is made from woven glass fabric impregnated with melamine resin and formed into a rigid electrical-insulation tube. Buyers commonly specify this material when dimensional stability, machinability and arc resistance are important to the fuse or switchgear design.
G5 and G9 selection
| Selection point | Engineering consideration |
|---|---|
| Grade | Specify G5 or G9 on the drawing. Do not substitute grades without design approval. |
| Environment | Confirm temperature, humidity, chemicals and required arc-resistance performance. |
| Dimensions | Current manufacturing range includes custom IDs from 4.5 mm to 70 mm and wall thickness from 0.5 mm; feasibility depends on length and tolerance. |
| Machining | Slots, tapers, holes and cut lengths can be reviewed from the finished-part drawing. |
| Compliance | If NEMA, MIL-I-24768 or IEC 60893 documentation is required, state the exact grade, edition and evidence needed in the RFQ. |
Typical applications
- Medium- and low-voltage fuse bodies
- Fast-acting, time-delay, EV charging and photovoltaic fuse components
- Switchgear, transformer and electrical support parts
- Machined insulating sleeves where melamine laminate is specified
RFQ checklist
Send the drawing or sample, G5/G9 grade, ID, OD, length, tolerances, machined features, electrical rating, operating environment, quantity and inspection requirements. We will confirm material availability, manufacturability and the applicable test documents before production.
For other constructions, compare our filament wound tube and vulcanized fiber tube.
Brochure and video
Frequently asked questions
What are G5 and G9 melamine tubes?
They are melamine-formaldehyde laminated tubes with glass cloth, offering strong arc resistance, flame resistance and good electrical properties for switchgear components.
Why choose melamine tube for fuse and switch parts?
Melamine resists arc tracking better than many laminates, which makes it suitable for arc-close parts such as fuse supports and contact carriers.
Request a quote
Send your drawing, voltage class, dimensions and quantity. Engineering review covers electrical, arc, moisture and mechanical requirements before production.