The AR0521P0 is an ESD protection diode array from Applied Power. It is made in the Dual Flat No-Lead (DFN0603-2L) package, which is a surface-mount package. It is RoHS-compliant and rated to protect against ESD spikes with up to 12V, 6.5V, and 5V of input voltage. It can be used in applications that require protection from electrostatic discharge such as consumer electronics, automotive, telecom, and industrial applications.