NP511 Glass Epoxy Laminate Sheet
NP511 Glass Epoxy Laminate Sheet is a woven glass fabric composite combined with a high-temperature epoxy resin system, certifiable to ANSI/NEMA IM 60000-2021 Grade G-11, MIL-I-24768/3 Type GEB, ASTM D709 Type IV Grade G-11, and IEC-60893-3-2 EP GC 203. The material delivers a flexural strength of 68,100 / 61,300 psi (LW/CW) and maintains excellent mechanical and electrical properties from cryogenic to elevated temperatures, with a glass transition temperature of 180°C and a temperature index of 170°C electrical / 180°C mechanical. UL Listed for thicknesses greater than 0.024″.
Key Properties
- Flexural Strength, Condition A LW / CW: 68,100 / 61,300 psi (469.5) / (422.6) MPa (ASTM D790)
- Flexural Modulus, Condition A LW / CW: 3,000 / 2,700 kpsi (20.7) / (18.6) GPa (ASTM D790)
- Tensile Strength, Condition A LW / CW: 43,000 / 37,000 psi (296.5) / (255.1) MPa (ASTM D638)
- Izod Impact Strength, Condition E-48/50 LW / CW: 12.00 / 9.00 ft-lb/in (6.41) / (4.80) J/cm (ASTM D256)
- Compressive Strength, Condition A Flatwise: 72,500 psi (499.9) MPa (ASTM D695)
- Tg by DMA: 180°C
We want to help!
Enter your information and we'll get you in touch with our knowledgable staff. We know how important to the right product for your project.
Request a Consultation
- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Specific Gravity | 1.80 | ASTM D792 |
| Rockwell Hardness (0.250″ Build-up) | 112 M Scale | ASTM D785 |
| Moisture Absorption, Condition D₁-24/23 | 0.20% | ASTM D570 |
| Flexural Strength, Condition A LW / CW | 68,100 / 61,300 psi (469.5) / (422.6) MPa | ASTM D790 |
| Flexural Strength, Condition E-1/150: T-150 LW | 40,000 psi (275.8) MPa | ASTM D790 |
| Flexural Modulus, Condition A LW / CW | 3,000 / 2,700 kpsi (20.7) / (18.6) GPa | ASTM D790 |
| Tensile Strength, Condition A LW / CW | 43,000 / 37,000 psi (296.5) / (255.1) MPa | ASTM D638 |
| Izod Impact Strength, Condition E-48/50 LW / CW | 12.00 / 9.00 ft-lb/in (6.41) / (4.80) J/cm | ASTM D256 |
| Compressive Strength, Condition A Flatwise | 72,500 psi (499.9) MPa | ASTM D695 |
| Bonding Strength, Condition A | 1,900 lb (861.8) kg | ASTM D229 |
| Shear Strength, Condition A Perpendicular | 22,000 psi (151.7) MPa | ASTM D732 |
Thermal Properties
| Property | Value | Test Method |
| Temperature Index — Electrical / Mechanical | 170 / 180°C | UL Bulletin 746b |
| Coefficient of Thermal Expansion, X-axis / Y-axis | 13.0 / 15.0 (“/”/°C × 10⁻⁶) | IPC-TM 650-2.4.24 |
| Tg by DMA | 180°C | — |
| Flammability Rating, Condition A | HB | UL Bulletin 94 |
Electrical Properties
| Property | Value | Test Method |
| Dissipation Factor @ 1 MHz, Condition D-24/23 | 0.020 | ASTM D150 |
| Relative Permittivity @ 1 MHz, Condition D-24/23 | 4.80 | ASTM D150 |
| Breakdown Voltage, Condition A | 60 kVolts | ASTM D149 |
| Breakdown Voltage, Condition D-48/50 | 55 kVolts | ASTM D149 |
| Electric Strength, Condition A | 700 Volts/mil (275.6) kV/cm | ASTM D149 |
| Electric Strength, Condition D-48/50 | 720 Volts/mil (283.5) kV/cm | ASTM D149 |
| Arc Resistance, Condition A | 120 sec | ASTM D495 |
| Comparative Tracking Index | 150 V | ASTM D3638 |
Compliance
- ANSI/NEMA IM 60000-2021 Grade G-11 — Certifiable
- MIL-I-24768/3 Type GEB — Certifiable
- ASTM D709 Type IV Grade G-11 — Certifiable
- IEC-60893-3-2 EP GC 203 — Certifiable
- UL Listed (thicknesses greater than 0.024″)
- High-temperature electrical insulation panels and structural components
- Switchgear and transformer insulating parts requiring elevated thermal performance
- Cryogenic to elevated-temperature structural insulation
- Precision-machined insulating components for military applications
- Electrical equipment where FR-4 temperature index is insufficient
Common industries: Electrical Equipment Manufacturing, Defense, Power Distribution, Industrial Manufacturing, Cryogenic Systems.
NP511 Glass Epoxy Laminate Sheet is the NEMA Grade G-11 entry in the Norplex-Micarta glass epoxy laminate line, engineered for applications requiring retention of mechanical strength and electrical performance across a broad thermal range from cryogenic to elevated temperatures.
With a glass transition temperature of 180°C and a temperature index of 170°C electrical / 180°C mechanical — significantly higher than NEMA FR-4 — this grade is the appropriate selection where thermal demands exceed the capability of standard FR-4 laminates. The material is UL Listed for thicknesses greater than 0.024″.
Compressive strength reaches 72,500 psi flatwise and bonding strength 1,900 lb. Breakdown voltage is 60 kV (Condition A) and electric strength is 700 Volts/mil (Condition A). Arc resistance is 120 seconds and comparative tracking index is 150 V. The elevated-temperature flexural strength at Condition E-1/150 (T-150) is 40,000 psi (LW), demonstrating retention of mechanical performance at 150°C service. Flammability is rated HB per UL Bulletin 94.
Certifiable to ANSI/NEMA IM 60000-2021 Grade G-11, MIL-I-24768/3 Type GEB, ASTM D709 Type IV Grade G-11, and IEC-60893-3-2 EP GC 203. UL Listed (thicknesses greater than 0.024″).
What differentiates NP511 Glass Epoxy Laminate Sheet from NP510A (FR-4)?
NP511 uses a high-temperature epoxy resin without bromine and achieves a Tg of 180°C and a temperature index of 170°C electrical / 180°C mechanical — substantially higher than NP510A's Tg of 130°C and temperature index of 130/140°C. NP511 is the choice when the application exceeds FR-4's thermal capability. However, NP511 carries a UL 94 HB flammability rating rather than V-0, so applications requiring flame retardancy must weigh thermal vs. flame performance requirements.
Why does the temperature index matter when selecting a glass epoxy laminate?
The temperature index (TI) is the maximum recommended continuous service temperature for electrical and mechanical performance respectively. Operating a laminate above its TI accelerates degradation of mechanical strength and dielectric properties, leading to premature failure in structural insulation and electrical barrier applications. NP511's TI of 170/180°C makes it suitable for environments that would cause accelerated aging in standard FR-4 laminates.
What is the temperature index for NP511 Glass Epoxy Laminate Sheet?
The temperature index is 170°C electrical / 180°C mechanical, as listed on the Technical Datasheet.
Is NP511 Glass Epoxy Laminate Sheet suitable for military and regulated electrical environments?
Yes. NP511 is certifiable to ANSI/NEMA IM 60000-2021 Grade G-11, MIL-I-24768/3 Type GEB, ASTM D709 Type IV Grade G-11, and IEC-60893-3-2 EP GC 203, and is UL Listed for thicknesses greater than 0.024".
How should NP511 Glass Epoxy Laminate Sheet be specified?
Specify grade (NP511 Glass Epoxy Laminate Sheet), thickness, compliance requirements (NEMA G-11, MIL-I-24768/3, or other applicable standards), dimensional tolerances, and finished format.
