If you are looking for a switch that can control the flow of electricity in a circuit, you might have come across two types of switches: dpdt momentary push button switches and conventional momentary push button switches. But what are the differences between them, and which one should you choose for your application? In this article, we will explain the features, advantages, and disadvantages of both types of push button switches, and help you make an informed decision.
What is a dpdt momentary push button switch?
A dpdt momentary push button switch is a switch that has two input terminals and four output terminals, and has six terminals in total. It can also be considered as two spdt switches combined. Dpdt stands for double pole double throw, which means that the switch can connect two pairs of terminals in two different ways. A momentary push button switch is a switch that works only when it is pressed, and returns to its original position when it is released. It is also known as a self-reset type or a non-latching type.
Types of Terminals Used
In push button switches, various types of terminals are commonly utilized to ensure secure and reliable connections. Here are some typical terminal types you might encounter:
- Blade Terminals: These include sizes such as 1/4″ and 3/16″. Blade terminals are widely used due to their ease of connection and disconnection.
- Screws: Commonly used screw sizes include #6, #8, and #8-32. These screws ensure that terminals are firmly held in place, providing a stable connection.
- Male Contacts: Typically 3/16″ male contacts are used for certain applications, offering a straightforward and secure connection option.
How does a dpdt momentary push button switch work?
A dpdt momentary push button switch works by temporarily connecting or disconnecting two pairs of terminals when it is pressed. For example, if the switch is in its default position, it can connect terminals A and C, and terminals B and D. When the switch is pressed, it can connect terminals A and D, and terminals B and C. When the switch is released, it goes back to its default position. This way, the switch can change the direction or polarity of the current in a circuit.
Types of Circuitry in Push Button Switches
Understanding the different types of circuitry available in push button switches is crucial for selecting the right one for your needs. Here are some common types:
- SPST Circuitry (Single Pole Single Throw): Offers a simple on-off function, typically used for basic operations. It is the most common type, with 23 available options.
- SPDT Circuitry (Single Pole Double Throw): Allows for switching between two outputs, making it versatile for more complex circuits.
- DPST Circuitry (Double Pole Single Throw): Similar to SPST but controls two separate circuits simultaneously. It is less common but useful for specialized applications.
Contact Actions
Push button switches also vary in terms of contact action, which defines how they behave when pressed:
- Normally Closed: The circuit remains closed until the switch is pressed.
- Off-On: These switches are off by default and turn on only when activated.
- (Off)-On: A momentary action where the switch is off and only makes contact when pressed.
What are the advantages and disadvantages of a dpdt momentary push button switch?
A dpdt momentary push button switch has some advantages and disadvantages compared to a conventional momentary push button switch. Some of the advantages are:
- It can control two circuits or devices with one switch.
- It can reverse the direction or polarity of the current in a circuit.
- It can create complex switching patterns or logic functions.
Some of the disadvantages are:
- It has more terminals and wires, which can make it more complicated to install and use.
- It can cause short circuits or damage if it is not wired correctly or if it is used for incompatible loads.
- It can be more expensive and less available than a conventional momentary push button switch.
What is a conventional momentary push button switch?
A conventional momentary push button switch is a switch that has two terminals, and has two terminals in total. It can also be considered as a simple spst switch. Spst stands for single pole single throw, which means that the switch can connect or disconnect one pair of terminals. A momentary push button switch is a switch that works only when it is pressed, and returns to its original position when it is released. It is also known as a self-reset type or a non-latching type.
By understanding the types of terminals used in these switches, you can ensure that you select the right components for your specific application, ensuring both functionality and reliability in your electrical projects.
How does a conventional momentary push button switch work?
A conventional momentary push button switch works by temporarily closing or opening a circuit when it is pressed. For example, if the switch is in its default position, it can disconnect terminals A and B. When the switch is pressed, it can connect terminals A and B. When the switch is released, it goes back to its default position. This way, the switch can turn on or off a device or a circuit.
By understanding these various configurations and actions, you can better choose the switch that fits your specific application, ensuring both functionality and reliability in your electrical systems.
What are the advantages and disadvantages of a conventional momentary push button switch?
A conventional momentary push button switch has some advantages and disadvantages compared to a dpdt momentary push button switch. Some of the advantages are:
- It has fewer terminals and wires, which can make it easier to install and use.
- It has less risk of short circuits or damage if it is wired correctly and if it is used for compatible loads.
- It can be cheaper and more available than a dpdt momentary push button switch.
Some of the disadvantages are:
- It can only control one circuit or device with one switch.
- It cannot reverse the direction or polarity of the current in a circuit.
- It cannot create complex switching patterns or logic functions.
Understanding Momentary and Maintained Switches
When distinguishing between momentary and maintained switches, the key difference lies in their activation method.
Momentary Switches
A momentary switch is only active while you’re pressing or holding it. Once you release it, the switch returns to its neutral position. It’s like pressing a doorbell—once you let go, it stops ringing.
Maintained Switches
In contrast, a maintained switch remains in its position after being toggled. Think of a light switch in your home; it stays on or off until you flip it again, reflecting a stable functionality.
How to Identify Them
To quickly identify the type of switch you’re dealing with, check for any text or markings:
- Momentary Switches: Often labeled with parenthetical notes such as “(ON)” or may have terms like “momentary on” indicating their short-term activation.
- Maintained Switches: Typically marked simply as “ON” without additional notes, signaling their persistent position until manually changed.
Understanding these differences ensures you select the right switch for your needs, maximizing functionality and efficiency in your projects.
How to Protect Your Push Button Switches
Push button switches are integral to many electrical systems, but they require suitable protection to ensure longevity and reliability. The best way to shield these essential components is by using high-quality electrical circuit breakers.
Optimal Circuit Protection
Choose from a variety of circuit breakers tailored to your specific needs:
- High-amp breakers: Ideal for systems that demand substantial power.
- Blade-type breakers: Known for their durability and reliability.
These devices offer robust protection, minimizing the risks of damage caused by electrical faults.
Finding the Right Solution
Whether you need a circuit breaker for safeguarding your electrical switches or an integrated accessory to enhance your existing setup, a broad selection is available from reputable manufacturers. Aim for items known for their quality and performance to ensure your switches are always protected.
Incorporating the right circuit breakers into your setup not only protects your push button switches but also ensures they operate efficiently in the long run.
Supported Nominal Voltages for Push Button Switches
Push button switches are designed to accommodate a range of nominal voltages, making them versatile for various applications. Here’s a breakdown of the typical voltage options supported:
- 12 VDC: The most common voltage, ideal for many automotive and electronic applications.
- 24 VDC: Used in more demanding industrial and heavy-duty environments.
- 16 VDC and 14 VDC: Variants available for specific specialized uses.
- 6-28 VDC Range: Some models offer flexibility, supporting a broad range within this spectrum.
These options ensure that push button switches can be integrated seamlessly into different voltage systems, catering to both standard and specialized needs.
Which one should you choose?
The choice between a dpdt momentary push button switch and a conventional momentary push button switch depends on your application and your preferences. You should consider the following factors before making a decision:
- The number of circuits or devices that you want to control with one switch.
- The need to reverse the direction or polarity of the current in a circuit.
- The complexity of the switching patterns or logic functions that you want to create.
- The ease of installation and use of the switch.
- The risk of short circuits or damage to the switch or the circuit.
- The cost and availability of the switch.
In general, a dpdt momentary push button switch is more suitable for applications that require more functionality and flexibility, such as reversing motors, changing signals, or creating logic gates. A conventional momentary push button switch is more suitable for applications that require less functionality and simplicity, such as turning on lights, sounding alarms, or activating relays.
Where to buy the best dpdt momentary push button switches?
If you are looking for high-quality dpdt momentary push button switches, you should check out our products at CDOE website. We are a leading manufacturer of momentary switches, and we offer a wide range of dpdt momentary push button switches with different shapes, styles, structures, and features. Our switches are designed and manufactured for extreme conditions, and they are sealed and resistant to water, dust, and corrosion. Our switches are also easy and fast to use, and they have LED lights that indicate the status of the switch.
Our dpdt momentary push button switches are ideal for various applications, such as industrial machines, electrical panels, generators, servers, and more. They can help you prevent accidents, injuries, and damage caused by electrical faults, fires, or other hazards. They can also help you save energy, money, and time by allowing you to control the flow of electricity in a circuit with a simple push of a button.
Common Applications for Momentary Push Button Switches
Momentary push button switches find their way into a multitude of everyday applications, showcasing their versatility. For instance, automotive horns are a classic example where these switches are indispensable. Beyond vehicles, they are integral to the operation of cranes, hoists, winches, and snowplows. These switches facilitate essential movements—whether it’s forward-reverse, up-down, left-right, or open-close.
In industrial settings, they are crucial for machinery operations that require precise control. With their ability to handle extreme conditions, our switches are perfect for these demanding applications, providing both reliability and durability. Whether you’re working on large-scale machinery or fine-tuning smaller electrical setups, our dpdt momentary push button switches offer the performance you need.
Don’t miss this opportunity to get our high-quality dpdt momentary push button switches at a reasonable price. To place your order, please contact us at +86 13968754347 or visit our website at www.chinacdoe.com.
We hope this article has helped you understand the differences between dpdt momentary push button switches and conventional momentary push button switches, and how to choose the best one for your application. If you have any questions or comments, please feel free to contact us. We are always happy to help you.