Littelfuse Illuminated SPDT, (On)-Off-(On) Rocker Switch Panel Mount

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A **r**ocker 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**”**. The rocker mechanism pivots on a central point, allowing the user to easily press one side of the rocker to activate the switch and the other side to deactivate it. Internally, the rocker is connected to electrical contacts that open or close the circuit, controlling the flow of current

## **Rocker Switch Functions**

Rocker switches serve a fundamental purpose in electrical circuits, acting as a convenient interface to control the flow of current to various devices. 

- **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.

## **Rocker Switch Wiring Configurations**

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. The wiring configuration will depend on your specific application and the desired behaviour of the switch. For instance:

- **Single Pole Single Throw (SPST):** The most basic configuration, with one input and one output. Controls a single circuit with on/off functionality.
- **Single Pole Double Throw (SPDT):** One input and two outputs. Allows switching between two different circuits or devices.
- **Double Pole Single Throw (DPST):** Two inputs and two outputs. Controls two separate circuits simultaneously with on/off functionality.
- **Double Pole Double Throw (DPDT):** Two inputs and four outputs. Enables switching between two pairs of circuits or devices.
- **Momentary vs. Latching:** Momentary switches only remain active while pressed, while latching switches maintain their position until toggled again.
- **Illuminated Rocker Switches:** Incorporate an LED or other light source to indicate the switch's status or provide visual feedback.

## **Rocker Switch Selection Considerations**

When choosing a rocker switch or on off switch, consider the following factors:

- **Voltage and Current Rating:** Ensure the switch can handle the electrical load of your application.
- **Durability and Lifespan:** Choose a switch with a high cycle life, especially for frequent on/off switching.
- **Environmental Considerations:** Consider IP ratings for protection against dust and moisture ingress, particularly if the switch is intended for outdoor or industrial use.
- **Physical Dimensions:** Verify the switch's size and mounting style (panel mount, PCB mount, snap-in) to ensure compatibility with your design.
- **Actuator Style:** Select the appropriate actuator style (standard, paddle, etc.) for user-friendliness and aesthetics.
- **Termination Style:** Choose the suitable electrical connection type (solder lug, quick connect, screw terminal).
- **Certifications and Approvals:** Ensure compliance with relevant safety standards for your industry and application.

## **Industry Applications**

Rocker switches are versatile components found in a plethora of applications, from everyday household appliances to complex industrial machinery. Their user-friendly design and reliable on/off functionality make them an ideal choice for controlling power in various settings.

- **Household Appliances:** Rocker switches are commonly used in devices like coffee makers, blenders, and lamps, offering convenient power control at your fingertips.
- **Automotive Applications:** In vehicles, these switches activate features such as headlights, power windows, and heated seats, providing essential control within the dashboard and interior.
- **Industrial Machinery:** Industrial rocker switches, designed for rugged environments, are used in control panels, machinery, and automation systems to manage power flow and operate various equipment.
- **Electronic Equipment:** Rocker switches are integrated into numerous electronic devices, including audio equipment, power tools, and medical devices, offering reliable on/off control for critical components.
- **Marine and Aerospace:** Specialised rocker switches designed for harsh marine and aerospace environments ensure reliable operation even in challenging conditions.

## **Your Trusted Rocker Switches Supplier & Manufacturer**

RS Australia carries high-quality rocker switches and on off switches from leading brands like [APEM](https://au.rs-online.com/web/c/switches/rocker-switches-components/rocker-switches/?applied-dimensions=4292077229), [Arcolectric (Bulgin) Ltd](https://au.rs-online.com/web/c/switches/rocker-switches-components/rocker-switches/?applied-dimensions=4291005732), [TE Connectivity](https://au.rs-online.com/web/c/switches/rocker-switches-components/rocker-switches/?applied-dimensions=4294725095), and more. To buy our rocker switches or other types of switches like a [magnetic proximity switch](https://au.rs-online.com/web/c/switches/limit-position-switches/magnetic-proximity-switches/) or a [selector switch](https://au.rs-online.com/web/c/switches/key-switches-selector-switches/selector-switches/), simply visit our product page and filter according to your specific requirements. 

Need more information on delivery? Check out our [Delivery page](https://au.rs-online.com/web/content/support/all-articles/delivery) for details on services and fees.



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Littelfuse Rocker Switches

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