The TE Connectivity / CII Brand part FCB-405-0521M is a highly reliable and durable electromechanical relay designed for use in military applications. This relay operates at a voltage of 28VDC and has a current rating of 5A. The 4PDT (4 pole double throw) configuration allows for versatile switching options. The relay is bottom mountable, making it easy to install and connect in various systems. With its rugged construction and excellent performance, this military-grade relay is an ideal choice for demanding applications where reliability and durability are critical.