The Classification Of PCB Mount Pushbutton Switch
Apr 04, 2023
PCB mount push button switches are widely used in the electronic industry for their easy installation and space-saving design. They are classified based on different parameters such as size, operating force, contact configuration, and mounting style. Here are the common types of PCB mount push button switches.
1. Size
PCB mount push button switches come in different sizes, ranging from miniature to full-size. The choice of size depends on the space available on the PCB and the desired type of operation. Miniature switches are preferred for space-constrained applications, while full-size switches are suitable for industrial applications that require high durability.
2. Operating force
The operating force of a PCB mount push button switch is the amount of force required to activate the switch. It is typically a measure of the mechanical resistance of the switch. Switches can be classified based on the operating force into low force, medium force, and high force switches. Low force switches require the least amount of force and are suitable for applications where a light touch operation is necessary, such as in handheld devices. Medium and high force switches are preferred for applications where a higher degree of mechanical or electrical durability is required, such as in automotive and industrial equipment.
3. Contact configuration
The contact configuration of a PCB mount push button switch describes the number of contacts and their arrangement in the switch. Push button switches can have single-pole single-throw (SPST), single-pole double-throw (SPDT), or double-pole double-throw (DPDT) configurations. SPST switches have one set of contacts that open or close with each actuation of the switch. SPDT switches have two sets of contacts, and the switch can alternate between the two positions with each actuation. DPDT switches have two sets of contacts, and each set operates independently of the other.
4. Mounting style
PCB mount push button switches can be mounted on the PCB in different ways, depending on the intended application. The most common mounting styles are through-hole mounting and surface mount technology (SMT) mounting.
Through-hole mounting involves placing the switch leads through holes drilled in the PCB and then soldering them onto the board. This is the most common mounting style for PCB mount push button switches and is preferred for its strong mechanical connection.
SMT mounting involves soldering the switch directly onto the surface of the PCB. This mounting style is preferred for its ease of assembly and space-saving design.
5. Illumination
PCB mount push button switches can also be illuminated for improved visibility or aesthetics. Illuminated switches typically feature an LED or other light source that is integrated into the switch itself. The LED can be of different colors, providing a visual indication of the state of the switch.
In conclusion, the classification of PCB mount push button switches is based on size, operating force, contact configuration, mounting style, and illumination. The choice of switch depends on the specific requirements of the application, such as space constraints, durability, and visibility. It is essential to choose the right type of switch to ensure reliable operation and long-term performance.
