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A **rocker switch** is a type of electrical switch that consists of a lever or rocker that can be toggled between two positions: "on" and "off." They are sometimes referred to as a **“on off switch”**. You can learn more on how rocker switches work in our comprehensive [Rocker Switch Guide](https://uk.rs-online.com/web/content/discovery/ideas-and-advice/rocker-switches-guide).

Here's some useful information on how to use rocker switches:

- Function: Rocker switches are primarily used to control the flow of electric current to devices or circuits. They act as a bridge between the power source and the load (device) you want to control.
- On and Off Positions: The rocker switch has two stable positions: "on" and "off", hence the name “on off switch”. In the "off" position, the switch interrupts the electrical circuit, preventing the current from flowing to the load. When you toggle it to the "on" position, the switch closes the circuit, allowing the current to reach the load.
- Wiring: To use a rocker switch, you need to connect the switch terminals to the relevant wires. Typically, a rocker switch has three terminals: a common terminal (also called the "COM"), a normally open terminal ("NO"), and a normally closed terminal ("NC"). The common terminal is where you connect the power source or the live wire. The NO and NC terminals are for connecting the load or to the device you want to control.
- Wiring Configurations: The wiring configuration will depend on your specific application and the desired behaviour of the switch. For instance:
    
    - If you want the load to be energized when the switch is in the "on" position, you would connect the live wire to the COM terminal and the load wire to the NO terminal.
    
    - If you want the load to be energized when the switch is in the "off" position, you would connect the live wire to the COM terminal and the load wire to the NC terminal.
- Installation: Rocker switches are typically mounted onto a panel or a switch box using screws or clips. Make sure to follow the manufacturer's instructions for proper installation.
- Applications: Rocker switches are widely used in various devices and systems, including household appliances, automotive applications, industrial machinery, and electronic equipment. They provide a convenient and straightforward way to control the power supply to different components.
- Considerations: When choosing a rocker switch, consider factors such as the voltage and current rating, the switch's durability, and the environmental conditions in which it will be used.


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Rocker Switches, On Off Switch | RS

Rocker Switches

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<p>On-Off rocker switches are a type of rocker switch that is on in either the left- or off in the right-hand position. The panel mount switches are versatile and are used in many industrial, commercial, or domestic applications. On-Off rocker switches have a momentary or latching switch operation, each type working in a different way.</p><p>RS offer a great selection of high-quality on-off rocker switches from well-known brands such as APEM, Arcolectric, Bulgin, TE Connectivity and of course RS PRO.</p><h2>Features and Benefits</h2><ul><li>Easy to install and maintain</li><li>Illuminated and Non-illuminated versions</li><li>AC or DC voltage ratings</li><li>Single pole (SPST) or Double pole (DPST) contact configurations</li><li>Quick connect, solder or PCB pin terminations</li><li>IP Ratings including IP40 splash-proof to IP68 sealed</li></ul><h2>What is the difference between momentary and latching operation?</h2><p>Latching rocker switches are activated by the user and will remain in any of the on positions and will remain in that position until it is switched off. They are also known as maintained or stay put.</p><p>Momentary rocker switches are activated by the user and will only remain in the on position while force is applied to the actuator. As soon as the force is removed the switch will return to the off position. Switches are often displayed like (on)-off. Anything with brackets is momentary or sometimes called spring return.</p>

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