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APEM Toggle Switch, PCB Mount, On-Off-On, SPDT, Through Hole Terminal


Toggle switches are electrical switches that have a lever or handle that can be flipped up or down to control the flow of electricity. They are commonly used to manually turn devices or circuits on or off. 

Toggle switches work by using a mechanical lever or handle to change the position of internal metal contacts, thereby controlling the flow of electricity. The lever or handle is connected to a mechanism inside the switch that physically moves the contacts. When the lever is flipped in one direction, it moves the contacts to one position, and when flipped in the other direction, it moves them to a different position. 

The specific positions of the contacts determine whether the switch is in the "on" or "off" state and which circuits are connected or disconnected. Inside the switch, the contacts are made of conductive materials such as metal. When the contacts are in the "on" position, they come into contact with each other, allowing electricity to flow through the switch and complete the circuit. In the "off" position, the contacts are separated, breaking the circuit and preventing the flow of electricity.

## **What Are the Differences Between Toggle Switches & Rocker Switches?**

While both toggle and rocker switches serve the same fundamental purpose of controlling electrical circuits, they differ in key aspects:

**Toggle Switches:**

- **Design:** Feature a lever that flips up or down to control the circuit.
- **Advantages:** Often preferred for circuit board applications due to their compact size and ease of sealing, offering better protection against dust and moisture in harsh environments.

**Rocker Switches:**

- **Design:** Have a flat, curved surface that rocks back and forth to activate the switch.
- **Advantages:** Renowned for their customisability. They often come with options to add icons, symbols, or even text to the switch face, enhancing user clarity and functionality communication.

## **Types of Toggle Switches**

Toggle switches, while seemingly simple, come in a variety of configurations to cater to diverse electrical control needs. Some of the most common types include:

- **On-On Toggle Switch:** This switch toggles between two "on" states, connecting the input to either of two output terminals. It's commonly used to select between different operating modes or power sources.
- **On-Off Toggle Switch:** The most basic type, it offers a simple binary control, switching between an "on" and "off" state. It's characterised by its distinct click when toggled, ensuring positive feedback to the user.
- **On-Off-On Toggle Switch:** This switch introduces a neutral "off" position in the centre, flanked by two "on" positions. Both "on" positions are momentary, returning to the central "off" position when released, providing flexibility in controlling circuits or devices.
- **Momentary Toggle Switch:** Equipped with a spring mechanism, these switches only remain in the "on" state while being held down. Upon release, they spring back to the "off" position. These are commonly found in applications requiring temporary activation, such as push-to-talk buttons or machine start buttons.

Beyond their apparent simplicity, toggle switches offer a range of configurations based on the number of poles (independent circuits controlled) and throws (switch positions). 

- [**Single Pole Single Throw (SPST)**](https://sg.rs-online.com/web/c/switches/toggle-switches-slide-switches/toggle-switches/?applied-dimensions=4291817267)**:** The simplest configuration, it controls a single circuit with two terminals, acting as a basic on/off switch akin to a light switch.
- [**Single Pole Double Throw (SPDT)**](https://sg.rs-online.com/web/c/switches/toggle-switches-slide-switches/toggle-switches/?applied-dimensions=4291817269)**:** With three terminals, this switch can connect the input to either of two output terminals, effectively switching between two circuits or devices. This makes it useful for selecting between different power sources or operating modes.
- [**Double Pole Single Throw (DPST)**](https://sg.rs-online.com/web/c/switches/toggle-switches-slide-switches/toggle-switches/?applied-dimensions=4291817266)**:** DPST switches are like having two independent on/off switches in one. They enable simultaneous control of two separate circuits, ideal for applications where multiple devices or components need to be powered up or shut down in unison.
- [**Double Pole Double Throw (DPDT):**](https://sg.rs-online.com/web/c/switches/toggle-switches-slide-switches/toggle-switches/?applied-dimensions=4294884962) Essentially two interconnected on-off switches, offer versatile control over two separate circuits. This allows for not just turning devices on and off, but also changing the direction of current flow or selecting between multiple power sources. DPDT switches are commonly used in applications like reversing the direction of electric motors or toggling between different operating modes. Their four-position capability makes them highly adaptable for complex control scenarios.

### **What Are the Benefits of Toggle Switches?**
- **Simplicity and Reliability:** Toggle switches have a straightforward design and operation, making them easy to use and understand.
- **Manual Control:** They provide manual control over electrical circuits, allowing users to easily turn devices on or off or switch between different functions.
- **Versatility:** Toggle switches are available in various configurations, sizes, and ratings, making them versatile for a wide range of applications. They can be used in low-voltage and high-voltage systems and are compatible with different types of circuits.
- **Visual Feedback:** Toggle switches often have a clear and visible position indicator, such as an up or down position, providing visual feedback to users about the state of the switch.
- **Cost-Effectiveness:** Affordable and cost-effective compared to other types of switches.
- **Durability:** Typically built with sturdy materials and are resistant to environmental factors such as dust, moisture, and vibrations.

## **Applications of Toggle Switches**

Toggle switches are versatile components, finding their way into countless applications across various industries, thanks to their simple operation and robust design.

- **Electronics and Electrical Devices:** From everyday household appliances like coffee makers and lamps to intricate electronic circuits, toggle switches provide a reliable on/off control mechanism.
- **Automotive Industry:** Toggle switches are indispensable in vehicles, controlling various functions like headlights, indicators, and interior lights, offering drivers quick and convenient access.
- **Industrial Control Systems:** In demanding industrial environments, toggle switches play a critical role in operating heavy machinery, controlling conveyor belts, and managing power distribution systems. Their rugged construction ensures reliable performance even in harsh conditions.
- **Aerospace and Aviation:** Toggle switches are used extensively in aircraft cockpits, providing pilots with control over critical systems such as navigation lights, landing gear, and communication equipment.
- **Telecommunications and Networking:** Toggle switches are utilised in telecommunication and networking equipment for configuring settings, enabling or disabling specific functions, and troubleshooting connections.
- **Robotics:** In robotics, toggle switches provide a simple and intuitive way to control various robot functions, from movement to manipulation of objects, facilitating seamless interaction between humans and machines.
- **Medical Devices:** Toggle switches find applications in medical equipment, where precision and reliability are crucial. They are used to control power, adjust settings, and activate specific functions in diagnostic tools, monitoring devices, and other medical equipment.
- **Power Distribution:** Toggle switches are used in power distribution panels and switchboards to control the flow of electricity to different circuits or loads, ensuring safety and efficient power management.

## **Your Trusted Toggle Switch Supplier in Singapore**

[RS Singapore](https://sg.rs-online.com/web/) is your premier source for high-quality toggle switches, offering an extensive selection from reputable brands like ABB, BACO, and RS PRO, which are known for their reliability and performance. 

We're dedicated to providing more than just components; we offer various types of [switches](https://sg.rs-online.com/web/c/switches/) and components, including [push button switches](https://sg.rs-online.com/web/c/switches/push-button-switches-components/) and more, that enhance the efficiency and dependability of your electrical systems.

Explore our wide range of toggle switches, including miniature, waterproof, and heavy-duty options, each meticulously chosen for its exceptional quality and performance. At RS Singapore, you'll find a team of experts ready to assist you with personalised service and technical knowledge. Trust RS for all your toggle switch needs and experience the difference our commitment to excellence can make for your projects. For detailed information on all available delivery options, including offline purchases and combined shipping, please visit our[Delivery Information Page](https://sg.rs-online.com/web/content/support/all-articles/delivery).



Toggle Switches

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