1) The 3RT1054-1AB36 part of Siemens is a contactor device. It is used to control AC motors, lighting, and other loads. The device has a control voltage of 24 Volts AC/DC and a power rating of 18 Amps.
2) The contactor device has normally open contacts, a ul listed screw terminals, and a power wiring compartment. It also has an epoxy sealed coil to protect it from dust and acts as a driver for the contactor.
3) The device also has a mechanical life of 100,000 operations, an electrical life of 10,000 operations, and it emits little-to-no noise when operating. The device is also UL Listed, making it suitable for use in commercial and industrial applications.