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. As a direct manufacturer and supplier, we provide G5/G9 Melamine Tube in made-to-drawing sizes with low minimum order quantities and fast sampling for both prototype and production runs.
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
Explore the full fuse tube range
This construction is part of our custom fuse tube range. Related constructions: vulcanized fiber tube, filament wound tube, synthetic arc quenching liner. For parts that insulate motors and switchgear, see the electrical insulation tube guide.
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.
Buying G5/G9 melamine tube from the plant that presses it
Melamine tube earns its place where arcs sit close to the insulation, because the resin resists tracking better than most laminates. That advantage rests on resin content, cloth lay-up and cure, not on the grade label alone. Buying through a trader usually means accepting whatever the previous production batch happened to be. We press these tubes ourselves, so resin pick-up and wall thickness hold batch to batch.
- Plant-direct pricing on G5/G9 melamine tube, no intermediary markup
- Small and trial quantities accepted for arc-close design work
- Resin content and wall thickness held consistently between batches
- ISO 9001 quality system governing pressing and finishing
- SGS material testing available on the melamine laminate
- RoHS and REACH declarations supplied on request
G5/G9 melamine tube: buyer questions
How small an order of G5/G9 melamine tube can you supply?
Trial and prototype quantities are accepted, which lets you verify arc and tracking performance before ordering full production volumes.
What quality evidence comes with melamine tube?
The laminate is produced under an ISO 9001 quality system, SGS material testing is available on request, and RoHS and REACH documents are supplied for incoming inspection.
How soon do you answer a melamine tube technical query?
Within one working day. An engineer reviews grade, dimensions and arc duty first; the quotation follows once those are confirmed.
Request a quote
Send grade (G5 or G9), inside and outside diameter, wall, length, and the arc and voltage duty. We check resin system and wall thickness against your application before pressing.