MMM: No brushed motor limit?

[BrianG]

I think most ESC makers simply lump the FET current ratings together and that's the current rating. But, anyone who takes a few minutes to look at a datasheet will see that those ratings are usually at 25*C (77*F). I tend to shoot for temps around 30*F above ambient max, so I'd have to run at 47*F ambient just to meet the FET temp ratings, and that is assuming adequate airflow on a perfect heatsink.

From what I've seen, Castle tends to rate their products at temperatures found on earth during normal running. Like their HV110. Even at around 160*F FET temps, the FETs still are capable of ~140A looking purely at the temperature derating curve. To match other makers' specs, they would have to rate the HV110 at something closer to HV180 or more.

I can see this helping Castle, and hurting them at the same time. A newb looking at the specs printed on the box will assume the other ESC is better because of the inflated ratings. Anyone "in the know" will see through that BS and figure the ESC is properly rated, but how many people fit that profile (think: the typical trx member)?

I think Castle should put some type of dual rating system on their boxes. One showing the real and proper rating, and one stating the rating if using other manufacturers' rating methods.

[e-mike]

thanks BrianG!!!!!i learn every day when i read your threadbut if i completely understand a lot of esc are overrated!!???a the castle esc are simply correctly rated????and for the mmm it doesn't mean that the esc seem to handle a lot of power!!???