111-8

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Rotary switches, also known as rotary selector switches, are powering and controlling switches that are used to select one position from any number of positions. The 111-8 rotary switch is a commercial general-purpose rotary switch that has eight positions to select from. It offers reliable performance and is well-suited for controlling appliances and other devices where a simple on/off control is needed.

The 111-8 rotary switch is designed with a white body, marked with its selection positions—1-8—printed in black. The switch consists of a cylindrical shaft with a knob on the end, typically constructed from either plastic or metal. It is generally mounted from the front panel of the installation and works by being rotated to the appropriate selection position. In the “Off” position, the switch remains flush with the front panel; when any other position is selected, the knob is pushed in slightly.

The mechanical action of the switch passes an electric current through two contacts, known as wafers, which simultaneously cause the electric circuit to close. Most 111-8 rotary switches are SPDT (single pole double throw) switches, meaning they have one single contact (the “Common”) that connects with either of two other contacts (one “Normally Open” and one “Normally Closed”). When the switch is turned to any position other than “Off,” electricity will start to flow. When it is turned back to “Off,” the fixed contact and the wafer contact both return to the open position and electricity ceases to flow.

Despite their simple design, rotary switches are versatile and have a wide range of applications, from controlling motors and other simple machinery to selecting electric heating elements. They are also frequently used in consumer electronics and musical instruments. For example, digital pianos often use rotary switches to select the type of sound they produce, while amplifiers typically use them to select operating modes and to adjust the volume.

In terms of hazardous environments, 111-8 rotary switches are IP54 rated, providing protection against water and dust ingress. They are also designed and certified to UL standards, making them safe to use with most common household appliances. The outer casing and the connecting wires are both made with thermoplastic material that is resistant to most common corrosive materials, such as oil and gasoline.

The 111-8 rotary switch is an inexpensive, reliable solution for controlling the power and current in many different applications. Its simple design and wide range of available features make it an ideal choice for controlling appliances, machinery, and other devices where a basic on/off control is required.

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