Hi Tom:
> Is it permitted to use PTC as an overcurrent protective device
> for power sources not inherently limited?
> I don't have EN60950-1 here, but I remember it must be a fuse
> or other non-autoreset device.
I said:
"The trick is to determine if your test houses can
class the PTC as an 'overcurrent protective device.'"
Another subscriber said that the PTC is a resistor and
therefore a PTC-protected LPS must be "inherently" limited.
I suggested the PTC as an overcurrent protective device
because as its resistance goes up, the PTC provides
protection against overcurrent.
Best regards,
Rich
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