What Is a Hot-Swap Keyboard? Hot-Swap vs Soldered, 3-Pin vs 5-Pin
Updated
A hot-swap keyboard lets you pull switches out and push new ones in by hand, with no soldering. The PCB has small sockets that grip each switch's metal pins, so changing switches takes a switch puller and a few minutes. On a non-hot-swap (soldered) keyboard, each switch is soldered to the PCB and changing it means desoldering.
How hot-swap works
Each switch has two metal pins underneath. On a soldered board those pins go through the PCB and are soldered in place. On a hot-swap board, they push into spring-loaded sockets mounted on the PCB instead, which hold them firmly but let go when you pull the switch out.
In electronics, "hot swap" means replacing a part while the device is powered on. Keyboards borrowed the name for swapping switches without soldering. It usually works with the board plugged in, but unplugging first is the safer habit.
Hot-swap vs soldered
| Hot-swap | Soldered | |
|---|---|---|
| Changing switches | Minutes, no tools beyond a puller | Desoldering and resoldering |
| Trying new switches | Easy | A project |
| Fixing a dead switch | Swap it | Desolder it |
| Layout flexibility | Fixed by the PCB | Some PCBs support more layout options |
| Long-term durability | Sockets wear after many swaps | Very durable |
For most people, especially first-time buyers, hot-swap is the better choice. Soldered boards still appeal to builders who want specific layout options or a set-and-forget build.
3-pin vs 5-pin
Switches come with either 3 pins (two metal pins and a plastic center post) or 5 pins (two extra plastic legs for stability). Hot-swap boards come in two kinds:
- 5-pin sockets accept both 5-pin and 3-pin switches.
- 3-pin sockets only fit 3-pin switches. You can still use 5-pin switches by clipping off the two extra plastic legs.
Which switches fit a hot-swap keyboard?
Most hot-swap boards use MX-style sockets, so most MX-style switches from Cherry, Gateron, Kailh, Akko and others will fit. The exceptions are boards built for a specific technology:
- Optical boards need matching optical switches.
- Hall effect boards need compatible magnetic switches.
- Low-profile boards need low-profile switches.
Check the product page for the switch type before buying.
Tips for swapping switches
- Pull straight up with the puller gripping the top and bottom clips of the switch.
- Check the pins are straight before inserting a new switch. Bent pins are the most common cause of a key not working.
- Support the socket if the board lets you, so you don't push it off the PCB.
- Sockets are rated for a limited number of swaps, so swapping every switch weekly isn't ideal, but normal experimenting won't wear them out.
Why hot-swap matters for sound
Switches are one of the parts that shape a keyboard's sound, and hot-swap makes them easy to experiment with. It's also how many people go from a stock board to a thocky or creamy one without buying a new keyboard. Here's how switch types compare in community sound ratings:
Frequently asked questions
What does hot-swap mean on a keyboard?
The PCB has sockets that hold each switch's pins, so you can pull switches out and push new ones in by hand without soldering.
Can I put 5-pin switches in a 3-pin hot-swap board?
Yes, if you clip off the two extra plastic legs. 5-pin boards accept both 3-pin and 5-pin switches as they are.
Do all switches fit a hot-swap keyboard?
Most MX-style switches fit MX-style hot-swap sockets. Optical, Hall effect and low-profile boards need switches made for them.
Is hot-swap worth it?
For most people, yes. It makes trying new switches and fixing a dead key a five-minute job instead of a soldering project.