The 3-1617805-5 is a high-performance, hermetically sealed SPDT relay from the FCA-125 series, featuring a polarized, single-side stable design. Its permanent magnet drive provides the armature holding force, resulting in significantly increased contact pressure compared to conventional spring return designs. The relay is equipped with silver cadmium oxide contacts with gold plating, rated for 25 amperes on resistive loads at 28 VDC or 115 VAC 400Hz. It operates reliably across a wide temperature range of -70°C to +125°C and at altitudes up to 300,000 feet. Qualified to military standards including M6106/19, its all-welded construction makes it ideal for demanding aerospace and defense applications.