Final answer:
A thermal fuse is more sensitive to heat and will blow sooner than an ordinary fuse to protect a circuit from excessive currents.
Step-by-step explanation:
A thermal-type fuse is more sensitive to heat build-up around the fuse and will blow sooner than an ordinary fuse. A fuse is a device that protects circuits from excessive currents by using a short piece of wire with a low melting point that heats up and breaks at the rated current. The design of the thermal fuse means that it can detect surrounding temperature increases and interrupt the circuit more quickly in the presence of high temperatures. Special fuses like the 'slow blow' fuse are intended for situations where high currents are expected for a brief period, such as with electric motors.