When choosing a mechanical keyboard, one of the crucial decisions is whether to opt for plate-mounted or PCB-mounted switches. The primary distinguishing factor lies in the number of pins on the switch’s bottom – 5 Pin vs 3 Pin Switch for PCB-mounted switches and 3 pins for plate-mounted switches. In this detailed guide, we will explore the differences between 3-pin and 5-pin switches and their unique characteristics, providing insights into how to adapt switches for compatibility with your PCB.
Distinguishing Plate-Mounted and PCB-Mounted Switches
The key difference lies in the number of pins at the bottom of the switch:
- PCB-Mounted Switches (5 Pins):
- These switches have five pins at the bottom – two metal pins for functionality, two plastic pins for stability, and a central pin resembling a large round knob.
- Directly mounted onto the circuit board, these switches use guiding pins for easy installation.
- Typically employed in smaller keyboards, they offer easier installation but may result in slightly more key bounce due to their lighter nature.
- Plate-Mounted Switches (3 Pins):
- Plate-mounted switches have three pins at the bottom, with a central pin and two metal pins.
- The stability pins found in PCB-mounted switches are absent in plate-mounted switches.
- Installed onto a metal plate above the board, these switches are then soldered to the PCB.
- Commonly used in larger keyboards, the plates provide robust support, making the keyboard more solid and enhancing stability.
Plate Mounting vs. PCB Mounting
- Plate Mounting:
- Switches are installed onto a metal plate above the board and then soldered to the PCB.
- Larger keyboards use plates to provide more robust support and enhance stability.
- Plates make keyboards more solid but may be difficult to disassemble and re-solder after installation.
- PCB Mounting:
- Switches are directly mounted onto the circuit board.
- Common in smaller keyboards, PCB mounting is simpler and requires fewer parts and assembly processes.
Understanding 3-Pin vs. 5-Pin Switches
The key difference lies in the number of pins:
- 5-Pin Switches:
- Have two small plastic legs on both sides of the bottom’s housing.
- Used in hot-swap PCBs with 5-pin switch compatibility, featuring four holes for the legs.
- The additional legs provide stability and secure the switch in the hot-swap socket.
- 3-Pin Switches:
- Lack the additional plastic legs found in 5-pin switches.
- Compatible with most hot-swappable boards that support 3-pin switches.
Converting Between 5-Pin and 3-Pin Switches
For those using hot-swappable keyboards that support 5-pin switches, but have 3-pin switches, conversion is possible:
- For 3-Pin Switches:
- Cut the two additional plastic legs using cuticle cutters, nail clippers, or similar tools.
- Care must be taken not to cut the pins that convey the signal to the computer.
Conclusion
In the realm of mechanical keyboards, understanding the differences between 5-pin and 3-pin switches, as well as plate-mounted and PCB-mounted switches, is crucial for making informed choices. While both types serve their purposes, considerations such as keyboard size, stability, and ease of assembly play a role in deciding which type of switch and mounting style to choose. By grasping these nuances, users can tailor their choices to suit their preferences and requirements in the realm of mechanical keyboards.
