Microtemp Thermal Fuse Protector One Shot 184c degree C  Universal Pack Of Five.

Rated for continuous operating currents up to 10 amps @ 250 VAC (15 amps @ 120 VAC), applied to millions of appliances and personal care products each year, providing reliable back-up protection for temperature controlling thermostats and other over-temperature conditions. Also widely applied in office machines, portable heaters and industrial equipment as a thermal safeguard.

The price is for a packet of 5.