The SFI0603-050E560NP-LF is a 0603-sized, TVS (Transient Voltage Suppressor) RoHS (Restriction of Hazardous Substances) approved part manufactured by SFI. It is a two-terminal device that protects sensitive components against transient voltage surges, while dissipating very little power. The E560NP-LF model in particular has a rated voltage of 5.6V and a peak pulse power of 500W. The part is designed for a wide range of automotive applications, and is suitable for protecting I/O interfaces, logic, and power ICs, as well as other applications where excess voltage can cause damage.