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Can You Put 5-Pin Switches in a 3-Pin Keyboard?
You have a keyboard that only supports 3-pin switches, but the switches you want to buy are 5-pin.
Can you still use them?
Yes. A 5-pin switch can usually be modified so that it fits in a 3-pin keyboard.
The two additional pins on a standard 5-pin MX-style switch are plastic stabilizing pins. They have no electrical function and can carefully be removed.
Quick explanation
A 5-pin switch does not fit directly into a 3-pin PCB because the PCB has no holes for the two additional plastic stabilizing pins. By clipping off those two outer plastic pins, you can usually use the switch just like a 3-pin switch.
1. Why does a 5-pin switch not fit directly into a 3-pin keyboard?
A standard 3-pin PCB has holes for:
- 1 central plastic mounting pin;
- 2 metal electrical contact pins.
A 5-pin switch also has two additional plastic stabilizing pins.
A 3-pin PCB has no holes for those.
As a result, the extra pins can hit the PCB before the switch is fully seated.
2. Which pins does a 5-pin switch have?
A standard 5-pin MX-style switch has:
- 1 central plastic mounting pin;
- 2 metal electrical pins;
- 2 additional plastic stabilizing pins.
The only difference from a 3-pin switch is therefore the two additional plastic support pins.
3. Are the two extra pins electrical?
No.
The two outer additional pins are only intended for mechanical stability.
They do not carry an electrical signal.
That is why the switch can still function normally after these pins have been removed.
4. Which pins should you remove?
You only remove the two outer plastic stabilizing pins.
You leave the following parts intact:
- the central plastic mounting pin;
- the two metal electrical contacts.
Never cut off the metal pins.
5. How do you identify the additional stabilizing pins?
Look at the bottom of the switch.
You will usually see:
- one larger plastic pin in the middle;
- two thin metal contacts;
- two smaller plastic pins on the outside.
Those two smaller outer plastic pins are the pins that can be removed.
6. How do you make a 5-pin switch fit a 3-pin PCB?
The most common method is to carefully clip off the two additional plastic pins.
You can use, for example:
- flush cutters;
- small side cutters;
- suitable precision tools.
Clip the pins as flush with the bottom of the housing as possible.
7. Do you need to cut the pins completely flush?
Ideally, yes.
If a large piece of plastic still sticks out, it may still hit the PCB.
The bottom does not need to look cosmetically perfect, but there should be no remaining plastic preventing the switch from sitting fully in the PCB.
8. Does the switch still work normally afterwards?
Yes.
If you only remove the two additional plastic stabilizing pins, nothing changes about the electrical operation of the switch.
The two metal contact pins continue to make the connection with the keyboard.
9. Does the feel of the switch change?
The internal operation of the switch does not change.
The following characteristics remain the same:
- actuation force;
- bottom-out force;
- pre-travel;
- total travel;
- tactile bump, if present;
- click mechanism, if present.
You only change the way the switch is mechanically supported in the PCB.
10. Does the switch become less stable?
A little, depending on the keyboard.
The two additional pins of a 5-pin switch provide extra stability in a PCB designed for them.
After removing those pins, the switch effectively behaves like a normal 3-pin switch.
If your keyboard has a sturdy plate, that difference is often small.
11. Is this safe for hot-swap keyboards?
Yes, as long as you remove the correct pins and install the switch carefully.
With hot-swap keyboards, you should mainly make sure the two metal contact pins are straight.
A bent metal pin can end up next to the hot-swap socket instead of inside it.
12. Should you check the metal pins?
Yes.
Before installation, always check that both metal contact pins are straight.
If a pin is slightly bent, you can carefully straighten it before inserting the switch.
13. Can you accidentally damage a metal pin while clipping?
You can if you work carelessly.
The plastic stabilizing pins are, however, clearly separate from the metal contacts.
Use a small cutter and work on one pin at a time.
14. Is modifying a 5-pin switch permanent?
Yes.
Once the two plastic pins have been removed, you cannot put them back.
The switch remains usable, but afterwards it effectively has a 3-pin mount.
15. Can you still use the switch in a 5-pin PCB later?
Yes.
A modified 5-pin switch still fits in a 5-pin PCB.
The two additional holes in the PCB simply remain unused.
You only lose the extra stability the two support pins would normally provide.
16. Is it better to buy 3-pin switches immediately?
If the same switch is available in a 3-pin version, that can of course be easier.
However, many modern switches are only or mainly available as 5-pin.
In that case, clipping the extra pins is a practical solution.
17. Does modifying 5-pin to 3-pin affect warranty?
It can.
You are permanently modifying the physical housing.
A seller or manufacturer may therefore treat a modified switch differently for returns or warranty claims.
Check the terms if that matters to you.
18. Can all 5-pin switches be modified this way?
With standard MX-style mechanical switches, usually yes.
But not every switch system uses the same footprint.
Be careful with:
- low-profile switches;
- optical switches;
- Hall Effect switches;
- proprietary switch systems.
Always first check that it is actually a standard 5-pin MX-style footprint.
19. Does this work with linear switches?
Yes.
The mounting footprint is separate from the internal switch type.
You can therefore find 5-pin versions among linear switches.
20. Does this work with tactile switches?
Yes.
Tactile switches can also use 3-pin or 5-pin housings.
The tactile bump has nothing to do with the number of mounting pins.
21. Does this work with clicky switches?
Yes.
With clicky switches, the pin count is also independent of the click mechanism.
22. What happens if you try to push a 5-pin switch into a 3-pin PCB without modifying it?
It is better not to.
The two additional plastic pins can press against the PCB.
If you use too much force, you can:
- damage the switch;
- stress the PCB;
- bend the metal pins;
- damage the hot-swap socket.
If a switch does not fit normally, do not force it.
23. How do you know whether your keyboard supports 3-pin or 5-pin?
Check the PCB.
A 3-pin footprint normally has:
- 1 central hole;
- 2 holes for electrical contacts.
A 5-pin footprint additionally has:
- 2 extra holes for plastic stabilizing pins.
24. Can you see this without fully disassembling the keyboard?
Sometimes.
With a hot-swap keyboard, you can remove one switch and inspect the switch position.
If you see two additional small holes next to the central hole, the PCB probably supports 5-pin.
25. Is a 3-pin keyboard the same as a plate-mount keyboard?
Not always literally, but the terms are often associated with each other.
3-pin switches are often called plate-mount because the plate provides additional stability.
5-pin switches are often called PCB-mount because the additional pins go directly into the PCB.
26. Is a 5-pin switch better than a 3-pin switch?
Not automatically.
The main advantage of 5-pin is additional mechanical stability.
The pin count says nothing about:
- how smooth the switch is;
- how heavy the switch is;
- how good it sounds;
- how quickly it actuates;
- whether it is linear, tactile or clicky.
27. Does clipping the pins affect sound?
Not directly.
You are not changing the internal construction of the switch.
The mounting may be slightly less stable than with a complete 5-pin installation, but the plate, case, PCB, foam, keycaps and switch design have much more influence on the sound.
28. 5-pin to 3-pin: advantages and disadvantages
| Advantages | Disadvantages |
|---|---|
| Many more switches become compatible | The modification is permanent |
| Electrical operation remains the same | You lose additional PCB stability |
| Simple modification | Every switch must be modified individually |
| Still works in 5-pin PCBs | May affect returns or warranty |
29. Should you modify all switches before you start?
You do not have to, but it can be more efficient.
You can first modify and test one switch.
If it fits correctly in the PCB and works normally, you can then modify the rest.
30. What is the easiest method?
A practical process is:
- Take one 5-pin switch.
- Identify the two outer plastic support pins.
- Carefully clip both flush.
- Check the two metal contact pins.
- Carefully insert the switch into the keyboard.
- Test whether the key registers.
- Then modify the remaining switches.
31. What if the switch still does not fit after clipping?
First check whether any plastic still sticks out where the support pins were.
Then check:
- whether the central pin is correctly in the hole;
- whether the metal contacts are straight;
- whether the plate opening is suitable;
- whether it really is a compatible MX-style switch.
32. What if the switch fits but does not register?
The additional plastic pins have nothing to do with registration.
Therefore, mainly check the two metal contact pins.
One of these pins may be:
- bent;
- next to the socket;
- not inserted deeply enough into the socket.
33. Should you buy 3-pin or 5-pin switches?
That depends on your keyboard.
| Keyboard | Best practical choice |
|---|---|
| 3-pin PCB only | 3-pin or modified 5-pin |
| 5-pin PCB | 3-pin or 5-pin |
| Plateless build | 5-pin has an additional advantage |
| Sturdy plate | Both work well |
34. What is the difference between 3-pin and 5-pin again?
The difference is two additional plastic stabilizing pins.
For a full explanation, you can also read our guide: What Are 3-Pin and 5-Pin Keyboard Switches?
35. Common mistakes
- Cutting off the metal pins instead of the plastic support pins.
- Forcing a 5-pin switch into a 3-pin PCB.
- Thinking the extra pins are electrical.
- Not checking whether the metal pins are straight.
- Assuming every switch type uses the same footprint.
- Modifying all switches before trying one test switch.
Conclusion
Yes, you can usually use 5-pin switches in a 3-pin keyboard.
A standard 5-pin MX-style switch has two additional plastic stabilizing pins that are not required for electrical operation.
By carefully clipping off these two outer plastic pins, the switch gets practically the same mounting footprint as a 3-pin switch.
The switch continues to function normally, but it loses the additional mechanical stability the two support pins would provide in a 5-pin PCB.
Always carefully check which pins you are removing and never force a switch into a PCB where it does not fit directly.