1. 3A125 is a pressure switch manufactured by Honeywell. It is a single-pole single-throw (SPST) mechanical switch with a switch rating of 25A, 250VAC and 30VDC.
2. The 3A125 switch consists of a switch mechanism, a spring-loaded stem, a metal housing enclosure, and a composite sealing diaphragm.
3. The 3A125 switch is typically used in commercial and industrial applications such as HVAC, pumps, compressors, and other equipment subject to overpressure or underpressure. It is designed to open and close a circuit when the switch’s adjustable preset pressure is exceeded.