The MJE13003 is a 1.5A, 400V NPN Bipolar Power Transistor is designed for high voltage power switching inductive circuits where fall time is critical. They are particularly suited for 115 and 220V SWITCHMODE application.
The ENC28J60-I/SO is a standalone Ethernet controller with an industry standard Serial Peripheral Interface (SPI™). It is designed to serve as an Ethernet network interface for any microcontroller equipped with SPI Communication.