What Is The DPDT Push Button Switch
Apr 04, 2023
A DPDT (Double Pole Double Throw) push button switch is a type of electrical switch commonly used in various applications where two different circuits need to be turned on or off simultaneously. It is a versatile switch, primarily used in industrial and automotive settings, and offers a convenient and easy way to control two circuits independently.
This type of switch has six contacts, which are divided into two sets. Each set contains three contacts which are connected in a particular pattern, allowing the switch to control two circuits. DPDT switches can be categorized into two types- momentary and latching.
Momentary switches are activated only when the button is pressed and released, while latching switches stay in their last state until the button is pressed again. DPDT switches are commonly used in automotive applications such as electric windows, door locks, power seats, and alarms, and in industrial control circuits, where multiple functions need to be activated or controlled simultaneously.
Construction and Characteristics of DPDT Pushbutton switches
The switch is constructed with six terminals divided into two sets, with three terminals in each set. The top three terminals are labeled as A, B, and C, while the bottom three terminals are labeled as D, E, and F.
The DPDT switch is designed with a spring-loaded button that needs to be pressed to switch the contacts. The spring-loaded button returns to its original position after it is released. The contact material used in the switch is usually silver or gold-plated, which provides excellent conductivity and prevents oxidation that may interfere with electrical flow.
DPDT switches are known for their high durability, resistance to wear and tear, and excellent electrical conductivity.
Applications of DPDT Pushbutton switches
DPDT switches are commonly used in various applications, such as;
1. Industrial Automation: DPDT switches are widely used in industrial automation and control systems. They are used to operate different functions of machinery or equipment, such as starting/stopping, forward/reverse, or up/down functions.
2. Automotive industry: DPDT switches are used in various automobile applications, such as electric windows, door locks, power seats, alarms, and electrical mirrors.
3. Home Automation Systems: DPDT switches are also used in home automation systems, where they can operate multiple functions or appliances and control them remotely.
4. Audio and Video Systems: DPDT switches are used in audio and video systems, such as mixing consoles or audio processors, where they are used to troubleshoot audio or video signals.
DPDT switches are also used in a variety of other applications, such as robotics, lighting systems, and medical devices.
Advantages and Disadvantages of DPDT Pushbutton switches
Advantages
1. Dual Circuit Control: The DPDT switch allows for dual circuit control, where two separate circuits can be controlled simultaneously with the same switch.
2. Versatile: DPDT switches are very versatile and can be used in various applications.
3. Durable: DPDT switches are known for their high durability, and resistance to wear and tear, which makes them suitable for long-term operation.
4. Excellent Switching Capacity: DPDT switches are known for their high switching capacity and can handle high current loads, making them suitable for industrial applications.
Disadvantages
1. Complex Wiring: DPDT switches have complex wiring configurations, which can be challenging for beginners to understand.
2. Low Switching Speed: DPDT switches have a low switching speed compared to other types of switches.
3. Relatively Expensive: DPDT switches are relatively more expensive than other types of switches.
Conclusion
The DPDT push-button switch is a necessary component in electrical and mechanical systems that require dual circuit controls. The switch can handle high voltage and current loads, which makes it ideal for use in industrial and automotive applications. The switch's versatility and durability make them popular in various applications, and despite their more complicated wiring configuration, they remain an indispensable device in a host of applications.
