SPREADERSHIELD-FLX™ SSFLX300-0.51-P1GP1A1
SPREADERSHIELD-FLX™ SSFLX300-0.51-P1GP1A1 is an eGRAF® flexible graphite heat spreader and heat shield with a 300 W/m·K in-plane and 3.4 W/m·K through-plane thermal conductivity, consisting of a 0.51 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 0.71 mm. It delivers a thermal contact impedance of 8.1 °C·cm²/W per side, a dielectric strength of 2500 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: 3.4 W/m·K
- Thermal Contact Impedance Per Side: 8.1 °C·cm²/W
- Operating Temperature: -40°C to +150°C
- Graphite Thickness / Spreader Thickness: 0.51 mm / 0.71 mm
- UL Flammability Rating: 94V-0
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Graphite Layer Thickness | 0.51 mm | — |
| Spreader Thickness (graphite + coatings) | 0.71 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 | 3.4 W/m·K | ASTM D5470 Modified |
| Thermal Contact Impedance Per Side | 8.1 °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 | 2500 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 pre-coated, adhesive-backed flexible graphite with electrical insulation
- Heat shielding in curved or complex-geometry enclosures leveraging the 6.4 mm minimum bend radius formability
- Thermally activated surface components for LED luminaires, display backlights, and power electronics
- Lightweight thermal management assemblies in automotive and portable electronics requiring press-formed or curved graphite components
- Dielectrically insulated heat spreaders in assemblies where direct graphite contact with metal or PCB surfaces must be avoided
Common industries: Electronics, LED lighting, automotive, consumer devices, telecommunications, thermal management systems.
SPREADERSHIELD-FLX™ SSFLX300-0.51-P1GP1A1 is part of the eGRAF® SPREADERSHIELD-FLX product line, which enhances the thermal conductivity performance of the SPREADERSHIELD® series while offering increased formability.
It functions as both a passive heat spreader and heat shield, and — unlike the uncoated SpreaderShield™ natural graphite grades — is supplied with a PET film top coating (0.025 mm) and PET film adhesive bottom coating (0.080 mm) already applied, yielding a total spreader thickness of 0.71 mm. The PET coatings provide mechanical protection and act as 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 material achieves a tensile strength of 8 MPa, dielectric strength of 2500 V (ASTM D149-09 Method A), a minimum bend radius of 6.4 mm, and a maximum width of 419 mm. 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 is lower than the uncoated natural graphite grades (+400°C), reflecting the temperature limitation of the PET film coatings. Properties listed are typical and cannot be used as acceptance or rejection criteria; product characteristics exclude coatings and adhesives unless noted. In-plane conductivity determined by Angstrom’s method; through-plane by ASTM D5470 Modified method.
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 SSFLX300-0.51-P1GP1A1 from SSFLX300-0.94-P1GP1A1?
SSFLX300-0.51-P1GP1A1 has a thinner graphite layer (0.51 mm versus 0.94 mm) and a lower total spreader thickness (0.71 mm versus 1.25 mm). Its thermal contact impedance is 8.1 °C·cm²/W versus 7.0 for the 0.94 mm grade, and its dielectric strength is 2500 V versus 3500 V. Both grades share the same 300 W/m·K in-plane conductivity, PET coating construction, bend radius, and operating temperature range. The 0.51 mm grade is selected where thinner cross-section is required; the 0.94 mm grade provides lower contact impedance and higher dielectric 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 area. At 300 W/m·K, SSFLX300-0.51 provides effective lateral heat distribution for applications where the PET-coated, adhesive-ready construction and formability of the FLX product line are required alongside strong thermal performance.
What is the operating temperature range for SSFLX300-0.51-P1GP1A1?
The operating temperature for SSFLX300-0.51-P1GP1A1 is –40°C to +150°C as listed on the TDS. This is lower than the uncoated natural graphite grades (–40°C to +400°C), reflecting the temperature limitation of the PET film coatings.
Is SSFLX300-0.51-P1GP1A1 suitable for flame-rated environments?
Yes. SSFLX300-0.51-P1GP1A1 carries a UL 94V-0 flammability rating and is RoHS compliant.
How should SSFLX300-0.51-P1GP1A1 be specified?
Specify grade (SSFLX300-0.51-P1GP1A1), confirm coating construction (PET film top / PET film adhesive bottom), compliance requirements, dimensional tolerances, minimum bend radius constraints, and finished format.
