Page 1 of 1

Running PTC heater core under voltage range

Posted: Tue, 20 Oct 2020, 08:50
by necrogt4
My knowledge of PTC heater cores is limited, but from what I can gather they're really just a big resistor.

I'm curious to know, what sort of issues would / could there be when running a PTC heater core under the specified voltage.

For example, running a heater core rated between 200-400v DC at ~100v. Would it just be less efficient or would there be other problems?

Re: Running PTC heater core under voltage range

Posted: Tue, 20 Oct 2020, 09:01
by antiscab
no issues, would just put out less heat

their resistance changes with temp, so it probably won't be as much less as you might expect (ie 1/4 voltage would be 1/16 power if fixed resistance, but more likely would be only 1/4 power due to resistance also dropping)