Hi, guys im building a digital thermostat to replace a mechanical thermostat in a portable heater. I have the digital part built, it output a +5v to turn on the heat and 0v to turn it off.
The heater is 1500w, lets say 2kw.
I thought I could use a IRF640N (N - CHANNEL 200v 18A .15RDS)
But If my calculation is correct the MOSFET will need to dissipate 41w.
\(I^{2}\) * \(R_{ds}\)
\(16.7^{2}\) * 15 ≈ 42w
Is there a way I could use this MOSFET or do I need something bigger?
*EDIT*
I do have a E45NK80ZD N-channel 800V - 0.11Ω - 45A but that still calculates to 30w
The heater is 1500w, lets say 2kw.
I thought I could use a IRF640N (N - CHANNEL 200v 18A .15RDS)
But If my calculation is correct the MOSFET will need to dissipate 41w.
\(I^{2}\) * \(R_{ds}\)
\(16.7^{2}\) * 15 ≈ 42w
Is there a way I could use this MOSFET or do I need something bigger?
*EDIT*
I do have a E45NK80ZD N-channel 800V - 0.11Ω - 45A but that still calculates to 30w
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