brands

attributes.Features

attributes.Series

attributes.Cutout_Diameter

attributes.Push_Button_Colour

attributes.Push_Button_Shape

attributes.Push_Button_Actuation

attributes.Push_Button_Style

attributes.Push_Button_Material

attributes.IP_Rating

attributes.Push_Button_Marking

attributes.Push_Button_Diameter

attributes.Better_World_Claim

attributes.Better_World_Product

attributes.Better_World_Verification

attributes.Hazardous_Area_Certification

Schneider Electric Harmony XB4 Series Blue Spring Return Push Button Head, 22.5mm Cutout, IP66, IP69, IP69K

Schneider Electric Harmony XB5 Series White Spring Return Push Button Head

EAO 704 Series Red Illuminated Momentary Push Button Head, 30.5mm Cutout, IP65


Push button heads are a critical component of push buttons, which are simple [switch mechanisms](https://au.rs-online.com/web/c/switches/push-button-switches-components/push-button-switches/) used to control various aspects of machines or devices. The push button head is the part that is pressed to operate the switch and is typically made from durable materials such as metal or plastic. When the push button head is pressed, it activates the internal switch mechanism, completing or breaking an electrical circuit to perform a specific function. This action can start or stop machinery, initiate processes, or control systems within a device.

## **What are push button heads used for?**

Push button heads are utilised in a wide range of applications, especially in industrial settings. They are often employed to start or stop heavy machinery, control conveyor belts, activate safety systems, and manage other critical processes. For example, in a manufacturing plant, a green push button head might be used to start a machine, while a red push button head might be used to stop it. These buttons are usually colour-coded to indicate their specific functions clearly, ensuring operators can quickly and easily identify the correct button to press.

Specific industrial use cases include:

- **Emergency Stop Systems:** Mushroom head [emergency stop buttons](https://au.rs-online.com/web/c/switches/push-button-switches-components/emergency-stop-push-buttons/) are prominently used in industrial environments to quickly halt operations in case of an emergency. Their large, red heads make them easily identifiable and accessible.
- **Control Panels:** Push button heads are integral components of control panels, allowing operators to control various aspects of machinery, such as starting, stopping, and adjusting settings.
- **Automated Systems:** In automated production lines, push button heads are used to initiate, pause, or terminate automated processes, ensuring smooth and controlled operation.

## **Types of Push Button Heads**

Push button heads come in various configurations to suit different applications. These variations can include differences in button colour, actuation type, cutout diameter, IP rating, body/bezel material, mechanical life, contact configuration, and style.

**Button Colour:** Button colour is an important aspect as it often signifies the button's function. For example, red is commonly used for stop or emergency stop functions, green for start, and yellow for caution. Colour coding helps in quickly identifying the intended use of the button.

**Push Button Actuation:** Push button actuation refers to how the button operates. It can be momentary (the button returns to its original position after being pressed) or maintained (the button stays in the pressed position until pressed again). Momentary buttons are often used for temporary actions like starting a machine, while maintained buttons are used for functions that need to stay active, such as emergency stops.

**Cutout Diameter:** The cutout diameter is the size of the hole required to mount the push button head. Standard sizes ensure compatibility with various control panels and enclosures.

**IP Rating:** The [IP (Ingress Protection) rating](https://au.rs-online.com/web/content/discovery/ideas-and-advice/ip-ratings) indicates the level of protection the push button head offers against dust and water. Higher IP ratings are essential for harsh industrial environments where exposure to these elements is common.

**Body/Bezel Material:** Push button heads are made from various materials, including metal and plastic. The choice of material can affect the durability and suitability for specific environments. For example, metal push button heads are more durable and suitable for rugged applications.

**Mechanical Life:** The mechanical life of a push button head refers to the number of operations it can perform before failure. High-quality push button heads have a longer mechanical life, making them suitable for high-usage applications.

**Contact Configuration: **Contact configuration, such as normally open (NO) or normally closed (NC), determines how the electrical circuit is controlled. NO contacts complete the circuit when pressed, while NC contacts break the circuit when pressed. This configuration is crucial for ensuring the correct operation of the control system.

**Button Style:** The style of the button can vary significantly. Some common styles include mushroom head, oval, rectangular, round, flat, flush, raised, and illuminated buttons. Each style has its advantages, depending on the application. For instance, flat buttons are less likely to be accidentally activated, while illuminated buttons are useful in low-light environments. Here are some distinctive features of the most popular push button styles:

### **Mushroom Head Push Button**

[Mushroom head push buttons](https://au.rs-online.com/web/c/switches/push-button-switches-components/push-button-heads/?applied-dimensions=4293736968) are designed with a large, domed head that is easy to press in emergency situations. These buttons are typically red and are often used as emergency stop buttons. The large surface area allows for quick and effective activation, ensuring that machinery can be halted immediately in case of danger.

### **Oval Push Button**

[Oval push buttons](https://au.rs-online.com/web/c/switches/push-button-switches-components/push-button-heads/?applied-dimensions=4293736954) have an elongated shape that provides a larger surface area that can host two buttons. This shape can be ergonomic, making it easier to operate with a single finger or the palm of the hand. Oval push buttons are used in various applications where quick and easy access is required.

### **Rectangular Push Button**

[Rectangular push buttons](https://au.rs-online.com/web/c/switches/push-button-switches-components/push-button-heads/?applied-dimensions=4293736950) feature a flat, rectangular head that can be used for precise control. These buttons are often found in control panels and are used for functions that require deliberate and accurate activation.

### **Round Push Button**

[Round push buttons](https://au.rs-online.com/web/c/switches/push-button-switches-components/push-button-heads/?applied-dimensions=4293737265) are the most common type and come in various sizes and styles. They can be flush-mounted, raised, or even illuminated, depending on the application. Round push buttons are versatile and used in many different control systems.

## **Buying Push Button Heads: Ordering & Delivery Information for Australia**

RS is a trusted supplier and distributor of high-quality push button heads from leading brands such as [ABB](https://au.rs-online.com/web/c/switches/push-button-switches-components/push-button-heads/?applied-dimensions=4294967279), [Eaton](https://au.rs-online.com/web/c/switches/push-button-switches-components/push-button-heads/?applied-dimensions=4294966708), [Schneider Electric](https://au.rs-online.com/web/c/switches/push-button-switches-components/push-button-heads/?applied-dimensions=4294965589), and [Siemens](https://au.rs-online.com/web/c/switches/push-button-switches-components/push-button-heads/?applied-dimensions=4294965546). Our extensive catalogue includes a wide variety of push button heads to meet diverse needs, from industrial control systems to consumer electronics. When selecting push button heads, consider specifications such as button colour, style, actuation type, and IP rating to ensure compatibility with your application. Detailed product descriptions and datasheets are available to help you make informed decisions.

RS Group also offers fast and reliable delivery of push button heads and other electronic components across Australia. Our delivery services are designed to ensure you receive your products promptly and efficiently. For more details on delivery services and fees, please refer to our [Delivery Page](https://au.rs-online.com/web/content/support/all-articles/delivery).



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