What Are Rotary Switches?
Rotary Switches are a type of electrical switch that uses a rotating mechanism to select one of several positions or settings. They are commonly used to control and configure electrical circuits in a wide range of applications.
How Do They Work?
Rotary switches typically consist of a circular or semi-circular body with multiple electrical contacts and a knob or lever that can be turned to make electrical connections between these contacts.
They can have multiple positions or settings, which are often indicated by markings around the switch body. These positions correspond to different electrical configurations, making them suitable for applications where you need to select from various options.
Inside the switch, there are electrical contacts that are connected to the various positions on the switch. As the switch is rotated, it physically connects different contacts to open electrical circuits.
They come in various configurations, such as single-pole, single-throw (SPST), double-pole, double-throw (DPDT), or more complex setups to suit different circuit requirements. Some have multiple decks, allowing for even more complex switching possibilities.
Pros & Cons
They are versatile components in electrical and electronic circuits, offering a convenient and reliable means to change the configuration or function of a device. They’re often designed for robustness and long-term reliability, which makes them suitable for industrial and heavy-duty applications.
However, they have a limited number of positions, making them unsuitable for applications requiring continuous or infinite adjustment, and they’re not suitable for applications requiring high-speed operation. They are generally best for manual or relatively slow setting adjustments.
What Are Rotary Switches Used For?
The specific use and design of the switch depends on the requirements of the application it serves. Some common uses for Rotary Switches are:
- Industrial controls
- Testing and instrumentation
- HVAC
- Appliances
- Audio equipment
- Electrical panels
E-Switch offers Rotary Switches in the KC Series and KC1901 Series.