Do you have a unique requirement?
Mechanical and electrical applications. High mechanical strength. Thermal class F insulation material. Self-extinguishing, halogen-free. Good chemical resistance.
Closest relevant standards
IEC 60893:PF GC 21
NEMA LI 1:G - 3
DIN 7735:Hgw 2075
G-Etronax B (PF GC 21) is phenolic-resin based, where the other glass-reinforced G-Etronax grades are epoxy or silicone. Under sustained heat it is far less temperature-stable than epoxy or PI, but it has one distinctive property: when briefly exposed to a very high temperature, a chemical reaction in the resin structure lets it withstand extreme heat for a short time, outlasting many other materials in that specific scenario.
This is the property the defence sector values it for. G-Etronax B is often used in single-exposure applications where something is fired or burned off once, rather than applications with repeated or sustained heat loading.
G-Etronax B and PI sit at opposite ends of the same trade-off: sustained, repeated heat versus a single brief exposure. For a one-off extreme-heat application, B is the more economical choice; PI earns its price premium when the heat load is continuous or repeated.
Suitable for electrical insulation and other electrical applications.
Suitable for applications where the materials are exposed to mechanical impact.
The material remains functional and retains its properties even at high temperatures.
The material does not contain halogens.
| Mechanical properties | Test method | Dimension | Value | Unit | Note |
|---|---|---|---|---|---|
| Bending strength | ISO 178 | id>100 mm | 300 | MPa | *1 |
| Compressive strength, axial | ISO 604 | 220 | MPa | *1 | |
| Cohesion between layers | IEC 61212-2 | id<100 mm | 250 | MPa | *1 |
| Electrical properties | Test method | Thickness | Value | Unit | Note |
|---|---|---|---|---|---|
| Electrical strength in oil at 90°C, perpendicular | IEC 60243-1 | B) 3 mm | 8 | kV/mm | *2 |
| Electrical strength in oil at 90°C, parallel | IEC 60243-1 | B) ≥ 3 mm | 50 | kV/25mm | *2 |
| Permitivity 50Â MHz | IEC 62631-2-1 | 5 | *3 | ||
| Permitivity 1Â MHz | IEC 62631-2-1 | 5 | *3 | ||
| Dissipation factor 50Â MHz | IEC 62631-2-1 | 0.03 | *3 | ||
| Dissipation factor 1Â MHz | IEC 62631-2-1 | 0.04 | *3 | ||
| Insulation resistance after submersion in water | IEC 62631-3-3 | 1000 | MΩ | *4 | |
| Comparative tracking index | IEC 60112 | ≥ 3 mm | 100 | CTI | *F |
| Physical and thermal properties | Test method | Thickness | Value | Unit | Note |
|---|---|---|---|---|---|
| Temperature index 20,000 h (T.I.) | IEC 60216 | ≥ 3 mm | 155 | °C | *F |
| Fire class | IEC 60695-11-10 | ≥ 3 mm | V-0 | *F | |
| Density | ISO 1183-A | All | 1.85 | g/cm³ | * |
| Water absorption | ISO 62-1 | 2 | mg/cm² | * | |
| Smoke emission & toxicity | EN 45545-2; R22, R23 & R24 | * | |||
| Oxygen Index (OI) | EN ISO 4589-2 | % | * | ||
| Smoke density (Ds max.) | EN ISO 5659-2 | * | |||
| Smoke density (Ds max.) | EN ISO 5659-2 | * | |||
| Toxicity (CITNLP) | NF X 70-100-1/-2 | * | |||
| Toxicity (CITG, 8 min) | EN 17084 | * |
The above values are average values resulting from extensive tests in our laboratories. ELEKTRO-ISOLA A/S disclaims any and all liability for the performance of our materials in applications outside our control. Elektro-Isola A/S reserves the right to modify the above data without notice or further information. Furthermore, we refer to our general disclaimer.
* Note that color and surface are indicative. As this is a technical product, colour and expression may vary according to dimensions, batches and machining. If you want further information or have special decorative needs, please feel free to contact us.
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With more than 100 years of experience in the industry and a complete internal supply chain, we can offer you electrotechnical and mechanical thermosetting composites of the highest quality - whether you need tubes, sheets or parts machined to your specifications.
