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Rectangular grey thermal pad, fifty by forty millimetres

Thermal Grizzly

Thermal Grizzly PhaseSheet PTM 50x40mm thermal pad

SKU CH-35VH-807JB

High-performance phase-change thermal pad, 50x40mm, solid at room temperature and liquefies above 45°C for optimal CPU and GPU heat transfer

  • FeaturesThe PhaseSheet PTM is a thermal pad based on a phase change
  • Phase change material liquefies at 45°C for optimal heat transfer
  • Solid at room temperature for clean, easy application
  • Non-electrically conductive design protects sensitive CPU and GPU components
  • Stable thermal conductivity maintained after 10 thermal cycles
  • Requires 300-400N contact pressure for minimal layer thickness

High-performance phase-change thermal pad

The Thermal Grizzly PhaseSheet PTM is a 50x40mm thermal pad built on phase-change material. It stays solid at room temperature for clean, easy handling and only liquefies above 45°C to fill microscopic gaps. The pad is non-electrically conductive, making it safe for direct use on CPUs, GPUs and other sensitive electronics.

Requires high mounting pressure for best results

Optimum distribution of the liquid phase demands a contact pressure of around 300-400N. Without sufficient pressure the pad cannot achieve its lowest possible layer thickness, limiting heat transfer. The material also contracts on solidification to minimise the pump-out effect caused by differing thermal expansion between copper coolers and silicon dies.

Durability rated at approximately 10 thermal cycles

Stable thermal conductivity is maintained after about 10 cycles, offering longer service life than traditional pastes but less than premium graphite alternatives. Buyers who need a pad that lasts indefinitely without re-application should consider other solutions.

Highlights

  • Phase change material liquefies at 45°C for optimal heat transfer
  • Solid at room temperature for clean, easy application
  • Non-electrically conductive design protects sensitive CPU and GPU components
  • Stable thermal conductivity maintained after 10 thermal cycles
  • Requires 300-400N contact pressure for minimal layer thickness

Specifications

BrandThermal Grizzly
ModelTG-PS-50-40
Part NumberTG-PS-50-40
FeaturesThe PhaseSheet PTM is a thermal pad based on a phase change material (PCM). The pads, which are solid at room temperature, can be easily applied and liquefy during operation, allowing them to effectively dissipate heat like a thermal paste. PhaseSheet PTM is electrically non-conductive and can therefore be used in many areas, with the primary application being in processors and graphics chips.

Questions about this item

Which size should I pick for my CPU or GPU?

The pad measures 50 by 40 millimetres and can be trimmed to fit smaller dies or left full-size for larger heatspreaders.

What does the 45 °C phase-change temperature mean once the pad is installed?

The material stays solid until the component reaches about 45 °C, then liquefies to fill microscopic gaps and returns to solid when it cools, minimising pump-out over repeated cycles.

How much mounting pressure does the phase-change pad need to work properly?

Thermal Grizzly specifies roughly 300 to 400 newtons of contact pressure so the liquid phase spreads into the thinnest possible layer for best thermal transfer.

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