The 172-12 is 172 series Centigrid® ultra miniature hermetically sealed armature relay for commercial applications. Its low profile height (0.28-inch) and 0.1-inch grid spaced terminals, which preclude the need for spreader pads, make it an ideal choice where extreme packaging density and close PC board spacing are required. The basic operating concept and internal structure are similar to Teledynes DPDT 114 Centigrid® relay. Unique construction features and manufacturing techniques provide overall high reliability and excellent resistance to environmental extremes. It has an internal discrete silicon diode for coil transient suppression. By virtue of its inherently low inter-contact capacitance and contact circuit losses, the relay is an excellent sub-miniature RF switch for frequencies well into the UHF spectrum.