Siemens 3TB4122-0XH0 AC Contactor, 48V AC Coil, 12A, 5.5kW, Size 0, Screw Terminal Original Brand New

Overview

The Siemens 3TB4122-0XH0 is a robust and reliable AC contactor designed for industrial motor control applications. This Size 0 contactor is part of the trusted Siemens 3TB series, known for its high performance and durability. It is specifically engineered to switch electrical loads up to 12A at 400V (AC-3 duty) with a corresponding power rating of 5.5 kW. The unit operates with a 48V AC coil at 50 Hz and includes integrated 1 NO + 1 NC auxiliary contacts, providing essential flexibility for control and signaling circuits.

Key Features & Benefit

• Reliable Performance: Built to Siemens’ rigorous quality standards, this contactor ensures stable and long-lasting operation in demanding industrial environments.
• Energy Efficient: The optimized design of the Siemens 3TB series minimizes power consumption, which helps reduce operational costs over time.
• Versatile Application: Ideal for a wide range of uses, including AC motor control, lighting systems, and heating applications.
• Enhanced Safety & Durability: Constructed with high-grade materials to withstand both electrical and mechanical stress, increasing its service life.
• Easy Installation: The compact size and secure screw connection terminals simplify the wiring process, reducing installation time and effort.
• Integrated Auxiliary Contacts: The built-in 1 normally open (NO) and 1 normally closed (NC) contacts eliminate the need for additional add-on blocks in many common control circuit configurations.

Function

The Siemens 3TB4122-0XH0 functions as an electrically operated switch. When the 48V AC control voltage is applied to its coil, it generates a magnetic field that closes the main power contacts. This allows the current to flow to the connected load, such as an electric motor. Simultaneously, the integrated auxiliary contacts change state—the NO contact closes and the NC contact opens—which can be used for interlocking other devices, providing feedback to a PLC (Programmable Logic Controller), or creating complex control logic.