Allen-Bradley 837-A3A Temperature Switch Max Temp 160F

Allen-Bradley 837-A3A Temperature Switch is an electro-mechanical temperature control switch from Rockwell Automation that uses a remote bulb and capillary (Style A) to sense temperature away from the controller housing and actuate a switching action when the setpoint is reached. It carries a maximum temperature rating of 160 °F, making it suitable for automatic temperature control and over-temperature protection in industrial equipment. The A3A variant specifies an adjustable operating range of 80 to 190 °F and commonly employs a 3-3/4-inch bulb length in standard configurations, enabling flexible placement within equipment housings. As part of Allen-Bradley’s 837 family of electromechanical temperature controls, this module provides a compact, field-replaceable temperature sensing solution for open or enclosed installations where remote sensing is preferred and reliable temperature-based switching is required.