205202-7 Connectors, Interconnects

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Multi-purpose contactors (205202-7) are a type of electrical device utilized within a variety of applications. Primarily used to control electrical circuits, the contactors can be found in a variety of industrial and commercial applications.

A contactor is made up of several parts. The contacts, usually two, will make and break the circuit. Depending on type, the contacts may be either normally open or normally closed. An electric coil is the component that controls whether or not the contactor is open or closed. Applying a voltage to the coil will cause the contactor to close, allowing electricity to flow through it, whereas removing that voltage will cause the contactor to open, breaking the circuit. Finally, mounting hardware completes the contactor such as a case and brackets for installation within the circuit.

The typical 205202-7 contactor from companies such as ABB and Eaton Corp has a 3 pole form and rated current of 10 A, with a UL recognized performance. It is designed to be used in electrical devices that require switching or circuit-breaking for lighting, heating, ventilation, air conditioning and motor speed applications. The contactor has a 24V control supply and is provided with captive mounting screws and contact pressure springs.

The way contactors work, in general, is quite simple. When power is directed to the coil, it becomes energized and is then able to control the electric current running through the contacts. When the coil is energized, this “pulls” the contacts apart, which then opens the circuit. To close the circuit, the power is then cut off from the coil, which allows the contacts to close and therefore completes the circuit.

The working principle of contactors is actually quite simple — when power is applied to the coil, it essentially creates a magnetic field that will cause the contactor’s contact points to “click” and separate or close the circuit. When the power is cut off, the magnetic field will disappear and the contact points will close together or open the circuit.

Multi-purpose contactors (205202-7) represent an important component of many electric and electronic systems and circuits. Its compact design can often simplify installation, while its reliable performance enables it to be used in a wide range of application from motor speed control to air conditioning and lighting.

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