MWT120 Generic Over Temperature Cutout 120°C 10A, Universal Appliance Thermal Protector

MWT120 is a generic over temperature cutout rated at 120°C and 10A. It's a safety device that breaks the circuit when the surface it's mounted against gets too hot, protecting heating elements, motors and the appliance around them. Use it to replace a failed cutout with the same temperature and current rating, and check that the mounting style and terminals match.

What happens when a thermal cutout fails

A thermal cutout is clamped or screwed against a hot surface, such as a heater housing or element bracket, and opens once that surface reaches its set temperature. A cutout that has failed open leaves the heating circuit dead, so the appliance runs but never warms up. One that keeps tripping is usually telling you something else is wrong, such as poor airflow, a blocked filter or a faulty thermostat, and that needs fixing first. Never bypass a cutout, even for testing, as it is there to prevent overheating and fire.

Part details

• Generic part MWT120
• Rated to open at 120°C
• 10A current rating
• Universal over temperature protection

Fitting the cutout

Isolate power to the appliance before starting. Note how the old cutout is mounted and make sure the new one sits flat against the same surface with good contact, as that's how it senses heat. Reconnect the terminals firmly. If the appliance is hard-wired, have a licensed electrician do the work, and find out why the original cutout failed.

Questions about this part

Can I use a cutout with a different temperature?

No. Replace it with the same temperature rating the appliance uses, here 120°C, and at least the same 10A current rating. A different temperature could let the appliance overheat or cut out during normal use.