The rule of thumb is that if it burns your thumb, then it's too hot.
The use of a properly designed circuit goes a long way towards preserving your MOSFET. Also, if it's too hot and doesn't have a heat sink, then put a heat sink on it. Even a small one will help noticeably.
Please reply with a photo or web link showing the transistor in question, so we can see what the options are.
On 9/28/2016 9:03 AM, Trumpeter wrote:
The one on my newly built kit gets pretty warm. Normal? I'm not an ee so go easy on me :)
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