The TSC+PT2.5AH250V with Cartridge Fuses 2.5A 250V Axial,5.2x20mm RoHS, manufactured by Walter, is a type of electronic component used to protect electrical circuits in case of overvoltage or current spikes. This is usually done by interrupting the flow of electricity to the particular circuit in the event of a sudden increase in the amount of energy that is supplied to the circuit. The TSC+PT2.5AH250V is composed of two parts, a Cartridge Fuse 2.5A 250V Axial,5.2x20mm RoHS and a Thermal Switch which is connected in parallel with the fuse. The Thermal Switch senses the temperature of the circuit and will open if the temperature goes above a certain level. This component can also provide a visual indication of an overvoltage situation. This unit is RoHS compliant and is commonly used in electrical and electronic applications where an accurate, reliable, and cost-effective overload protection is required.