GraphiteTIM at 62mm Modules

Fertmann

Hello,

I wanted to enquire whether there is any experience with 62mm modules and GraphiteTIM?
For example, what Rth could one expect with the CAS300M17BM2 or the CAS310M17BM3 in conjunction with an EYGR0611ZLWH or EYGR0610ZLAH (GraphiteTIM from Panasonic)?

Forum_Moderator

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AustinC

Hi Fertmann,

Graphite TIM generally has lower thermal performance (higher thermal resistance) than most grease TIMs from our experience. Graphite TIM relies on high compression to achieve the claimed thermal performance, and it does not fill gaps in the baseplate/coldplate as well as a grease TIM. We understand that graphite has the potential to increase lifetime due to no pump-out/drying mechanism, but there are also many TIMs formulated to reduce pump-out/drying (such as Honeywell's PTM6000). We use graphite sheets on some of our test benches where ease-of-application and cleanup are the most crucial over absolute thermal performance.

I located one example of the thermal performance difference between a graphite TIM and a thermal grease (KP-12) using a WolfPACK GM3 module. The grease TIM averaged 0.28°C/W RTH-JS while the graphite TIM averaged 0.34°C/W RTH-JS (thermal resistance from junction to sink, which includes the TIM layer).

Best Regards,

Austin C.

TBhatia

Hi, I hope that this answered your question. I will close this discussion for now but if you have a follow up question, please "Start a New Discussion" and we would be glad to support you further.