<p>It really depends on the ESC. Different ESC's have different ratings.</p>

<p>Many ESCs would perform best under 85°C and some microcontrollers work better if under 70°C. But there are ESCs that can work just fine with hotter temperatures. For example, Castle Creations ESCs can handle a sustained 70-82°C and will have issues around 100°C but most ESCs will have lower tolerance levels and may have issues above 80°C. In general, the closer an ESC is to room temperature, the better it's longevity will be.</p>

<p>If an ESC gets too hot, several things could happen that would result in it burning out. Some components of the ESC could stop functioning.</p>

<p>So the best thing you can do is look at the temperature ratings for the specific ESCs you are looking at and measure the temperature of the ESC after a flight. If the ESC is too hot you can set a throttle limit or adjust power in some way. </p>

<p>There is some more information <a href="https://www.rcgroups.com/forums/showthread.php?1454205-Maximum-safe-ESC-temperature" rel="nofollow noreferrer">here</a>.</p>

CC BY-SA 4.0
2020-04-20T15:45:19.010Z
2020-04-21T22:10:23.723Z
2020-04-21T22:10:23.723Z
Jacob B
<p>Like you said in your answer, it does depend on the ESC... so you definitely want to look into the specifications for your particular components.  However, to be safe, a good rule of thumb suggested on <a href="https://www.rcuniverse.com/forum/rc-electric-off-road-trucks-buggies-truggies-more-147/7619230-how-hot-should-my-esc-get.html" rel="noreferrer">this forum</a> is that you want to be able to put your finger on it without discomfort for five seconds.  If your reflex is to withdraw after only 2 seconds, chances are you're running a significant risk of overheating it.</p>

<p>As to what happens if you exceed the temperature... it's not pretty.  Insulation on electric components starts to melt, resulting in shorts...  Overheating will typically result in a pretty instantaneous failure.</p>

<p>It's always a good idea to keep your ESC exposed to a constant airflow.  If you put it inside a closed compartment, ensure that you have some way that airflow is being sent through that compartment.</p>

CC BY-SA 4.0
2020-04-22T08:47:02.723Z
A frequent outcome of ESC's overheating during racing competitions is:

Failure of ESC -> loss of thrust from one prop -> uncontrolled crash -> ESC catches fire
Rory Alsop
CC BY-SA 4.0
2020-04-20T16:02:28.683Z
2020-04-20T16:02:28.683Z
anonymous2
<p>What is the maximum safe temperature that a brushless drone ESC should get? What could happen if a brushless ESC were to go over its maximum temperature tolerance?</p>

CC BY-SA 4.0
2021-09-22T16:32:52.337Z
The language in this question is "should", but for fun: ESCs can get sufficiently hot that the MOSFETs melt their own solder pads. They will hold and conduct from surface tension alone, until a flip or acrobatic move sends mosfets and hot solder flying in all directions
Brydon Gibson
<esc><temperature-rating><safety>
How hot should an ESC get?
Jacob B
# How hot should an ESC get?

(Asked by: username_0 on 2020-04-20)

What is the maximum safe temperature that a brushless drone ESC should get? What could happen if a brushless ESC were to go over its maximum temperature tolerance?

**Tags:** esc, temperature-rating, safety
> **Comments:**
> **username_1**: The language in this question is "should", but for fun: ESCs can get sufficiently hot that the MOSFETs melt their own solder pads. They will hold and conduct from surface tension alone, until a flip or acrobatic move sends mosfets and hot solder flying in all directions  

---

## 2 answers

### Answer by username_0 on 2020-04-20. Score: 3 | Accepted answer

It really depends on the ESC. Different ESC's have different ratings.

Many ESCs would perform best under 85°C and some microcontrollers work better if under 70°C. But there are ESCs that can work just fine with hotter temperatures. For example, Castle Creations ESCs can handle a sustained 70-82°C and will have issues around 100°C but most ESCs will have lower tolerance levels and may have issues above 80°C. In general, the closer an ESC is to room temperature, the better it's longevity will be.

If an ESC gets too hot, several things could happen that would result in it burning out. Some components of the ESC could stop functioning.

So the best thing you can do is look at the temperature ratings for the specific ESCs you are looking at and measure the temperature of the ESC after a flight. If the ESC is too hot you can set a throttle limit or adjust power in some way.

There is some more information [here](https://www.rcgroups.com/forums/showthread.php?1454205-Maximum-safe-ESC-temperature).


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### Answer by username_2 on 2020-04-20. Score: 4

Like you said in your answer, it does depend on the ESC... so you definitely want to look into the specifications for your particular components. However, to be safe, a good rule of thumb suggested on [this forum](https://www.rcuniverse.com/forum/rc-electric-off-road-trucks-buggies-truggies-more-147/7619230-how-hot-should-my-esc-get.html) is that you want to be able to put your finger on it without discomfort for five seconds. If your reflex is to withdraw after only 2 seconds, chances are you're running a significant risk of overheating it.

As to what happens if you exceed the temperature... it's not pretty. Insulation on electric components starts to melt, resulting in shorts... Overheating will typically result in a pretty instantaneous failure.

It's always a good idea to keep your ESC exposed to a constant airflow. If you put it inside a closed compartment, ensure that you have some way that airflow is being sent through that compartment.

> **Comments:**
> **username_3**: A frequent outcome of ESC's overheating during racing competitions is:  Failure of ESC -> loss of thrust from one prop -> uncontrolled crash -> ESC catches fire  

---

