A-55 NPS Aluminum Foil / Polyester Film EMI-RFI Shielding Laminate
A-55 NPS is an aluminum foil and polyester film laminate engineered for EMI and RFI shielding, providing signal attenuation of 95 dB at 100 MHz. Supplied without adhesive or liner, the 0.005″ laminate delivers a dielectric strength of 13,500 volts, tensile strength of 18,000 P.S.I. minimum, and elongation at break of 115%. Its unsupported construction makes it well suited for applications where a self-contained shielding layer is required rather than a pressure-sensitive tape.
Key Properties
- Signal Attenuation: 95 dB @ 100 MHz (ASTM D4935-99)
- Tensile Strength: 18,000 P.S.I. min. (ASTM-D-882)
- Elongation at Break: 115% (ASTM-D-882)
- Dielectric Strength: 13,500 volts (ASTM D149)
- Total Thickness: 0.005″ +/- 5% (ASTM-D-374)
- Polyester Film Thickness: 0.005″
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Aluminum Foil Thickness | 0.00035″ | — |
| Polyester Film Thickness | 0.005″ | — |
| Total Thickness | 0.005″ +/- 5% | ASTM-D-374 |
| Color | Silver | — |
| Shelf Life | 1 year @ 70°F(21°C)/50% R.H. | — |
Mechanical Properties
| Property | Value | Test Method |
| Tensile Strength | 18,000 P.S.I. min. | ASTM-D-882 |
| Elongation at Break | 115% | ASTM-D-882 |
Electrical Properties
| Property | Value | Test Method |
| Signal Attenuation | 95 dB @ 100 MHz | ASTM D4935-99 |
| Dielectric Strength | 13,500 volts | ASTM D149 |
- EMI/RFI shielding for electronic enclosures
- Shielding of cable and connector assemblies
- Lamination into composite shielding constructions
- Shielding of PCB and component assemblies
- High-attenuation shielding for sensitive electronic assemblies
Common industries: Electronics manufacturing, telecommunications, industrial equipment, and defense/military systems.
A-55 NPS is the heaviest-gauge grade in the A-Series aluminum foil and polyester film laminate line, built around a 0.005″ polyester film layer that brings total thickness to 0.005″ and dielectric strength to 13,500 volts — the highest insulation margin in the family — while holding the standard 95 dB @ 100 MHz attenuation rating. Its unsupported construction gives it a self-contained shielding function without any adhesive system.
The laminate is supplied in silver and carries a manufacturer-rated shelf life of one year when stored at 70°F (21°C) and 50% relative humidity. Its 18,000 P.S.I. minimum tensile strength and 115% elongation at break — the highest elongation in the line — provide substantial conformability and mechanical integrity for slitting, die-cutting, and lamination into finished shielding assemblies.
What differentiates A-55 NPS from other foil laminate grades in the A-Series line?
A-55 NPS is the heaviest-gauge grade in the line, at 0.005" total thickness, delivering the highest dielectric strength (13,500 volts) and highest elongation at break (115%) of any A-Series grade, while holding the standard 95 dB @ 100 MHz attenuation rating — making it the choice where maximum insulation margin and conformability matter most.
Why does tensile strength matter for A-55 NPS?
As an unsupported foil/film laminate with no adhesive backing, A-55 NPS's 18,000 P.S.I. minimum tensile strength and 115% elongation at break give it substantial mechanical integrity for slitting, die-cutting, and lamination into finished assemblies without tearing the foil or delaminating the film.
What is the storage range for A-55 NPS?
The manufacturer's TDS rates shelf life at 1 year when stored at 70°F (21°C) and 50% relative humidity. No separate operating temperature range is specified on the TDS.
Is A-55 NPS suitable for FCC-regulated EMI/RFI shielding environments?
No — the manufacturer's TDS for A-55 NPS does not state an FCC or any other compliance standard, so suitability for FCC-regulated programs would need to be independently verified.
How should A-55 NPS be specified?
Specify grade (A-55 NPS), thickness, color, compliance requirements, dimensional tolerances, and finished format.
