LED modules and industrial control boards share a requirement that decides the material before conductivity does: the interface must be electrically insulating, and it must stay put for years without bleeding onto something it should not.
| Thermal conductivity | 5.3 ± 0.2 W/m·K at 10 kg load, 10 W source, 0.102 mm bond line |
|---|---|
| Surface resistivity | >10¹⁴ Ω/sq — insulating despite carbon nanotube content |
| Operating range | −20 to 120 °C |
| Oil bleed | 2.5 ± 0.2% at high temperature over long duration |
| Shelf life | 3 years |
| Coverage | Nano modification lowers paste density, giving roughly 1.5–2× the coverage area per unit weight |
LED and industrial control are volume businesses with thin margins per unit. A paste that covers 1.5–2 times the area per kilogram changes the bill of materials on every board, every day, for the life of the product. That is often a larger commercial effect than the difference between 4 and 5 W/m·K, and it is the number a purchasing engineer will actually act on.
Where it does not fit: anything running continuously above 120 °C. For traction inverters, SiC modules and under-hood automotive, see the honest limits on our automotive page — the answer there is a different material class.
Usually yes for the module-to-housing interface, but the answer depends on your thermal path as a whole rather than on one number. Always compare against a competitor's figure at the same bond line and pressure.
Surface resistivity is specified above 1e14 ohm/sq. Validate against your own creepage and clearance requirements.
Roughly 1.5-2 times a conventional filled silicone grease of equivalent specification, because nano modification lowers the paste density. Establish the exact figure with your dispensing pattern.
Oil bleed is specified at 2.5 +/- 0.2% under high-temperature long-duration conditions. If optics are close to the interface, design for it.
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