The FCB-405-0619M is a polarized, single-side stable relay designed for high-reliability military and aerospace applications. It features a 4PDT contact arrangement capable of switching 5 amps at 28 VDC or 115/200 VAC 400 Hz. The all-welded, hermetically sealed construction and permanent magnet drive ensure robust performance, high contact pressure, and resistance to extreme environmental conditions. Qualified to MIL-R-83536, this relay is ideal for demanding applications requiring high shock and vibration immunity, operating across a temperature range of -70°C to +125°C.