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Old 05-03-2014, 07:59 PM   #1
eagle33
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Default ESC Amps?

I have a motor that takes a 5-Amp ESC. I have a 10A ESC on hand. Will the 10A work O.K. or do I need to get the 5A?
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Old 05-03-2014, 08:29 PM   #2
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It will work perfectly. It's actually better to go for a esc more than motor requirement.
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Old 05-03-2014, 11:36 PM   #3
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A good rule of thumb for esc's is to aim for around 25% over the rating of the motor.FI,if your motor draw is 30A max,go for a 40A esc.
Most esc's are made in China,no matter what the brand name suggests,and the Chinese tend to describe their wares as more powerful than they are.
Your 10A esc is probably good for 8A,so still quite safe for A 5A motor.
Having said that,motor ratings are subject to a number of variables,such as prop size,battery,etc.
A watt meter is a good investment if you're a regular electric builder.
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Old 05-04-2014, 01:52 AM   #4
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The only penalty with using the over rated ESC is weight... as long as the voltage you will be using is in the ESCs useful range.

There won't be much weight difference between 5 amp and the 10 amp ESCs, and USUALLY they would both accept the same voltage ranges.
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Old 05-04-2014, 07:20 AM   #5
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The Wattmeter is a good investment ... factory motor data is crap usually .. think of like cars 'reported' Fuel consumption .. how many actually get those figures ?

It is common for a motor to draw more than factory says ... and it's better to have 'head-room' in the amps rating of your ESC.

You can use a 100A ESC if you want .. it's just heavier !

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Old 05-04-2014, 12:30 PM   #6
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Great information from all of you. Many thanks.
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