What is "Thermodisc", and the difference between "Thermodisc" and "Thermistor"?

Question

Confused about those two products. Anyone can help. Thanks very much!

Answer 1

"Therm-O-Disc" is a trade name for a whole range of temperature sensing products, including "thermistors" (a generic component name) and other thermal sensing products. A thermistor (thermat resistor) is a two-terminal analog device whose resistance varies continuously in proportion to a changing temperature.

However, most of the Therm-O-Disc line consists of bi-metallic thermal devices which commonly have two-terminals and depending on their design, turn either on or off suddenly (digitally) at a predetermined temperature. These devices function as thermostats or thermal cutoffs (fuses)

WK

Answer 2

Never heard of a thermodisc. Doesn't mean much except not used in my electronics work. A thermistor, on the other hand, is much like a varactor. It can be a diode or transistor that changes conductance with temperature. By general description, I would assume the "thermodisc" would maybe be a bi metal disc that would react to temperature changes much like a thermocouple.
Generally, "therm" indicates "temp controlled".

Answer 3

Thermodisc

Answer 4

Olin's answer seems supreme.

I have seen therm-o-discs placed in clothes dryers to protect from overheating, for example. They are capable of passing relatively high currents. I would call it a thermoswitch.