What actually fits
The K2 HE ships with Gateron double-rail magnetic switches. Replacements need to be the same double-rail magnetic type; Gateron sells them directly and through Keychron. Magnetic switches from other ecosystems (Wooting's Lekker, Gateron KS-20 variants for other boards) are not guaranteed to sit or read correctly, so check Keychron's compatibility note before buying.
Why MX switches will not work
Hall effect boards have no electrical contacts in the socket; they read the position of a magnet inside the switch. An MX switch has no magnet, so even if it clicks into place mechanically, the board cannot see it. The reverse is also true: HE switches do nothing useful in a normal hot-swap board.
Keycaps are the flexible part
The stems are standard MX shape, so any normal keycap set fits. If you want to customize the K2 HE, caps are where you have free rein; switches are where you are locked to the magnetic ecosystem.
What a switch swap changes here, and what it does not
On the K2 HE, adjustable actuation points and rapid trigger live in the firmware, not the switch. Swapping switches changes spring weight, smoothness and sound; it does not add or remove sensing features. That inverts the usual MX logic, where the switch defines both the feel and the behavior. The practical consequence: if your goal is a different actuation distance, open Keychron's configurator before spending anything on hardware. And after any swap, run through the calibration or key-test routine the configurator offers, since the readings depend on the magnet now sitting in each socket; Keychron's documentation covers the current procedure.
Mistakes seen in the magnetic hot-swap early days
- Buying keycap-and-switch bundles. The bundled MX switches are useless here; only the caps fit.
- Assuming all Gateron magnetic switches match. Gateron sells magnetic switches for several ecosystems; the K2 HE wants the double-rail type sold for it, so match the listing to the board, not the brand.
- Forcing a switch that will not seat. If it resists, the format is probably wrong; magnetic sockets do not reward persistence.
- Tossing the stock switches. Keep them for warranty conversations and resale; boards this new hold their value better when complete.
Longevity: what ages and what does not
Hall effect switches have no metal contacts to oxidize, pit or bounce, which removes the classic failure mode of mechanical switches; the sensing side should age gracefully. What still wears is ordinary: springs, slider rails and factory lubricant, the same as any switch. The honest caveat is that consumer Hall effect boards are recent, so the community does not yet have many years of failure data the way it does for MX. Treat extreme lifetime claims, in either direction, as unproven. Meanwhile the practical care advice is boring: keep liquids away, dust occasionally, and the board will likely outlast your interest in it.