SPREADERSHIELD-FLX™ SSFLX300-0.94-P1GP1A1
SPREADERSHIELD-FLX™ SSFLX300-0.94-P1GP1A1 is an eGRAF® flexible graphite heat spreader and heat shield with a 300 W/m·K in-plane and 4.2 W/m·K through-plane thermal conductivity, consisting of a 0.94 mm graphite layer with PET film coating (0.025 mm) on top and PET film adhesive (0.080 mm) on the bottom for a total spreader thickness of 1.25 mm. It delivers a thermal contact impedance of 7.0 °C·cm²/W per side, a dielectric strength of 3500 V, a minimum bend radius of 6.4 mm, and an operating temperature of -40°C to +150°C. The material is UL 94V-0 rated and RoHS compliant.
Key Properties
- Thermal Conductivity — In-Plane: 300 W/m·K
- Thermal Conductivity — Through-Plane: 4.2 W/m·K
- Thermal Contact Impedance Per Side: 7.0 °C·cm²/W
- Operating Temperature: -40°C to +150°C
- Graphite Thickness / Spreader Thickness: 0.94 mm / 1.25 mm
UL Flammability Rating: 94V-0
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- Specifications
- Applications
- General Info
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Physical Properties
| Property | Value | Test Method |
| Graphite Layer Thickness | 0.94 mm | — |
| Spreader Thickness (graphite + coatings) | 1.25 mm | — |
| Top Coating | PET Film Coating (0.025 mm) | — |
| Bottom Coating | PET Film Adhesive (0.080 mm) | — |
| Maximum Width | 419 mm | — |
| Minimum Bend Radius | 6.4 mm | — |
| Tensile Strength | 8 MPa | — |
Thermal Properties
| Property | Value | Test Method |
| Nominal Thermal Conductivity — In-Plane | 300 W/m·K | Angstrom’s Method |
| Nominal Thermal Conductivity — Through-Plane | 4.2 W/m·K | ASTM D5470 Modified |
| Thermal Contact Impedance Per Side | 7.0 °C·cm²/W | — |
| CTE — In-Plane | –0.4 × 10⁻⁶ m/m·°C | — |
| CTE — Through-Plane | 27 × 10⁻⁶ m/m·°C | — |
| Specific Heat @ 25°C | 710 J/kg·°C | — |
| Operating Temperature | –40°C to +150°C | — |
Electrical Properties
| Property | Value | Test Method |
| Dielectric Strength | 3500 V | ASTM D149-09 Method A |
Adhesion Properties
| Property | Value | Test Method |
| Adhesive Strength — P1A1 Bottom Coating | 3.47 N/cm | 90° peel, ASTM D3330, glass plate |
Flame & Fire Performance
| Property | Value | Test Method |
| Flammability Rating (UL) | 94V-0 | — |
Regulatory / Compliance Data
| Property | Value | Test Method |
| RoHS Compliance | Yes | — |
Compliance
- UL 94V-0 — Compliant
- RoHS — Compliant
- Passive heat spreading in electronics assemblies requiring a thicker, pre-coated, adhesive-backed flexible graphite with electrical insulation and lower thermal contact impedance
- Heat shielding in curved or complex-geometry enclosures requiring maximum thermal performance from the FLX product line
- Thermally activated surface components for high-power LED luminaires, industrial lighting, and power electronics
- Lightweight thermal management assemblies in automotive and portable electronics where higher through-plane conductivity and greater dielectric strength are required versus the 0.51 mm grade
- Dielectrically insulated heat spreaders in assemblies where direct graphite contact with metal or PCB surfaces must be avoided and higher voltage isolation is required
Common industries: Electronics, LED lighting, automotive, consumer devices, telecommunications, thermal management systems.
SPREADERSHIELD-FLX™ SSFLX300-0.94-P1GP1A1 is the thicker of the two SPREADERSHIELD-FLX™ grades in the eGRAF® product line, featuring a 0.94 mm graphite core for a total spreader thickness of 1.25 mm including PET film top coating (0.025 mm) and PET film adhesive bottom coating (0.080 mm). It functions as both a passive heat spreader and heat shield, offering increased formability for curved or complex shapes compared to rigid heat spreader materials.
The PET coatings provide mechanical protection and electrical insulation, preventing the graphite from creating unintended electrical conduction paths. The adhesive strength of the P1A1 bottom coating is 3.47 N/cm per 90° peel adhesion test (ASTM D3330) on a glass plate.
The thicker graphite core of the 0.94 mm grade delivers improved thermal performance compared to the 0.51 mm grade: through-plane conductivity is 4.2 W/m·K (versus 3.4 W/m·K), thermal contact impedance per side is 7.0 °C·cm²/W (versus 8.1), and dielectric strength is 3500 V (versus 2500 V, per ASTM D149-09 Method A).
Tensile strength is 8 MPa, minimum bend radius is 6.4 mm, maximum width is 419 mm, and CTE is –0.4 × 10⁻⁶ m/m·°C in-plane and 27 × 10⁻⁶ m/m·°C through-plane. Specific heat at 25°C is 710 J/kg·°C. The operating temperature ceiling of +150°C reflects the PET film coating limitation. Properties listed are typical and cannot be used as acceptance or rejection criteria; product characteristics exclude coatings and adhesives unless noted.
Compliant with UL 94V-0 and RoHS. Caution: Do not use the part if the plastic coating is damaged or becomes compromised, as an established electrical path increases the risk of device short circuit and fire.
What differentiates SSFLX300-0.94-P1GP1A1 from SSFLX300-0.51-P1GP1A1?
SSFLX300-0.94-P1GP1A1 has a thicker graphite core (0.94 mm versus 0.51 mm) and a greater total spreader thickness (1.25 mm versus 0.71 mm). The thicker core delivers a higher through-plane thermal conductivity (4.2 versus 3.4 W/m·K), lower thermal contact impedance (7.0 versus 8.1 °C·cm²/W), and higher dielectric strength (3500 versus 2500 V). Both grades share the same 300 W/m·K in-plane conductivity, PET coating construction, bend radius, operating temperature range, and tensile strength.
Why does in-plane thermal conductivity matter for heat spreader selection?
In-plane thermal conductivity determines how efficiently SPREADERSHIELD-FLX™ laterally distributes heat from a localized source across the spreader. At 300 W/m·K, SSFLX300-0.94 provides the same lateral heat distribution as the 0.51 mm grade while benefiting from a thicker graphite core that reduces thermal contact impedance and improves through-plane heat transfer — an advantage in applications where both lateral spreading and vertical heat flux are design considerations.
What is the operating temperature range for SSFLX300-0.94-P1GP1A1?
The operating temperature for SSFLX300-0.94-P1GP1A1 is –40°C to +150°C as listed on the TDS, reflecting the temperature limitation of the PET film coatings.
Is SSFLX300-0.94-P1GP1A1 suitable for flame-rated environments?
Yes. SSFLX300-0.94-P1GP1A1 carries a UL 94V-0 flammability rating and is RoHS compliant.
How should SSFLX300-0.94-P1GP1A1 be specified?
Specify grade (SSFLX300-0.94-P1GP1A1), confirm coating construction (PET film top / PET film adhesive bottom), compliance requirements, dimensional tolerances, minimum bend radius constraints, and finished format.
