The HMX KD200 switch now has its successor. The KD400 switches are a new clack king and they are manufactured by HMX using the newest molds and newest materials.
The KD400 is the first-ever HMX switch that uses the M1 strengthened POM stem and the N3 bottom housing. When they collide, it creates a unique and clacky sound profile. It is reminiscent of the classic HMX clack, but there is something more to it.
Mold-wise, KD400 uses the L3 mold sets with a slightly larger gap between the stem and the top housing, allowing for a super smooth travel.
These switches are a unique existence among the HMX linear lineup, and a must try if you are a clack lover.
Specs
1 quantity = 35 switches in one packaging box
Switch Type: Linear
Designer: 80 Retros
Mold: New (L3)
Manufacturer: HMX
Stem material: Strengthened POM (M1)
Top Housing: Modified PA12
Bottom Housing: N3 (PA66 + PBT)
Operating Force: 40g/45g/50g/57g
Bottom-out Force: 46g/50g/55g/63g
Pre-travel: 1.2mm
Total Travel: 3.5±0.2mm
Spring: KOS single-stage extended
Factory Lubed: Yes! Stem legs and stem sliders are covered with a very thin coat of 205g0. The spring and leaf are lubed with dry film.
Product Highlights
A very clacky switch
Factory lubed and ready to use out-of-the-box
Great acoustic on both thocky and clacky keyboard builds
Manufactured using custom and high-precision molding
Unique material blends for special sound and feel
They are great for:
A unique clacky-sounding keyboard build
Precise and fast actuation for gaming
A 3.3mm travel distance for a comfortable typing experience
Medium-heavy spring for most work duties
All products are inspected and videotaped by our QA staff before shipping out. If any items arrive damaged, we will help you replace them right away!
HMX X 80 RETROS KD400 Linea...
46g Bottom Out X35 in KD Packaging
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Customer Reviews
Overall rating: 5.0 / 5 from 12 reviews.
Amazing i have full review on them on my youtube channel please visit guys https://www.youtube.com/@Jtechlabreviews
Ahmad A.5/5Verified
Ordered those switches from UniKeys and though shipping got delayed (so I haven't tested them yet!), the buying experience was top-tier.
Huge thanks to Dashan for being so supportive. UniKeys is definitely the best place to buy mechanical keyboard switches!
Ahmad A.5/5Verified
These are great. I’ve used so many hmx switches and so far these are my favorite. I have replaced my Geon F1’s and Glare65’s switches with these switches and they sound flawless and the factory lubing is consistent and well done. The kd200 and hmx retro t’s I had before in these boards were also great, but these kd400 are even better.
Griffin H.5/5Verified
Again my favorite switch , different keyboard !
Lessard G.5/5Verified
My favorite switch!
Lessard G.5/5Verified
Awesome switch ! I got the 63g and i ouvert it , so clacky!
Lessard G.5/5Verified
A modern clacky switch done right. Smooth and well-balanced switch.
Linda T.5/5Verified
Super Clacky, I have the 63g bottom out version and they are very nice to type on, probably my favourite heavy linear for 2026 so far 😀
Aidan P.5/5Verified
Good!!!
満春 岩.5/5Verified
Awesome switches. I can only compare them to the Xinhai and Oil Kings, and I think HMX has once again brought us a killer switch. The KD400 feel super smooth and have a very crisp sound. They're also a little louder compared to the Xinhai, but I wouldn't expect a huge difference. All in all very well recommended.
