1SFA619403R5234 is an Overcurrent Relay, produced by ABB, that is used in medium voltage power distribution applications. It is a Programmable Electronic Overcurrent Unit that is designed for high-performance protection, metering, and automation capabilities. This Overcurrent Relay has an integrated Ethernet Modbus TCP/IP, SNMP, and IEC 61850 server, which makes it an excellent choice for use in remote distributed systems. The Overcurrent Relay has a wide operator interface with 10 pushbuttons and an LCD display, which makes it easy to use. This Overcurrent Relay also has a comprehensive range of inrush control and reclosing capabilities.