Overview
G7 is a silicone resin glass fabric laminate with excellent high-temperature performance (TI 180°C) and good electrical properties. Used in transformers, motors and high-temperature electrical insulation. Maintains properties at temperatures where epoxy laminates (FR4, G11) would degrade.
Grade-specific information
Available supplier grades
Each record below names the supplied grade, source and scope. Certifications, approvals, colours and forms apply only where stated for that specific grade.
VOLTIS® SI 2965
Isovolta Group
Confirm with quotation
High-temperature flame-retardant silicone glass laminate for electrical and thermal insulation, particularly where high-frequency electrical characteristics matter.
- Product form
- Sheet
- Thicknesses / diameters
- 0.3–100 mm
- Formats / dimensions
- 1220 × 900; 1240 × 930; 2140 × 1240; 2800 × 1240 mm, subject to thickness
- Colour
- White
- Surface / structure
- Woven glass cloth with cured silicone resin
Key technical data
- Standards: NEMA LI 1 G7; IEC 60893 SI GC 202
- Density: approx. 1.8 g/cm³ (ISO 1183/A)
- Flexural modulus: 13,000 MPa (ISO 178)
- Tensile strength: 90 MPa (ISO 527)
- Flammability: UL 94 V-0
Technical-data source: VOLTIS SI 2965 technical datasheet (Isovolta Group, 2013)
VOLTIS® SI TU 21
Isovolta Group
On request
G7-family tube made with the VOLTIS SI 2965 resin system for insulation at high frequencies and elevated temperature.
- Product form
- Round rolled silicone woven glass-fabric tube
- Thicknesses / diameters
- Outside diameter 16–300 mm; maximum wall thickness 12 mm and not more than 0.25 × internal diameter
- Formats / dimensions
- 1000 and 1200 mm lengths
- Colour
- Not specified in source document
- Surface / structure
- As produced or ground
Key technical data
- Standards: IEC 61212 SI GC 21; NEMA LI 1 G7
- Density: approx. 1.7 g/cm³ (IEC 61212)
- Flexural strength: minimum 100 MPa at 23 °C
- Thermal endurance: TI 180 (IEC 61212)
Technical-data source: VOLTIS SI TU 21 technical datasheet (Isovolta Group, 2012)
Grade data is taken from the named manufacturer source. Current MaterialCut supply, final dimensions and commercial conditions are confirmed in the quotation.
Technical Properties
Generic material-family guidance. Use the named supplier-grade records above for product-specific source, dimensions, colours and technical data.
| Property |
Value |
Unit |
| Density |
1.75 |
g/cm³ |
| Tensile Strength (Yield) |
150 |
MPa |
| Flexural Strength |
200 |
MPa |
| Service Temp. Long-term |
-50 … 180 |
°C |
| Flammability (UL94) |
V0 |
|
| Dielectric Strength |
15 |
kV/mm |
