keyboard switches

Kailh Deep Sea - Silent Linear Box Master V3

Kailh SKU: KS-DSS-BMV3-70


70 Switches
90 Switches
110 Switches
No Extra Switches
5 Extra Switches (+$6.00)


Switch Type: Linear (Silent)

Pins: 3

Mount: Plate

Travel: 1.8mm pre-travel | 3.6mm total travel

Force: 34g Operating | ≥ 15g resistance

This brand new Kailh Deep Sea silent mechanical keyboard switch is something special. Kailh is a close partner and has been working on this Master iteration for some time. In the past Masters had minor quirks that needed ironing out. This may be, at present, the highest quality and most advanced silent linear switch that Kailh manufactures.

Introducing the Kailh Deep Sea Ultra-Silent Box Master V3.

Highly Limited stock

POM Stem

Material Upgrade
The older Linear Jellyfish Master has a slightly miss-aligned operating and reset-point, a nylon stem that can turn scratchy over time. The V2 improved on the stem but didn't align the operating and reset-point fully. V3 improves upon past experiments with even tighter tolerances. There is a fully-sealed circular white POM stem with Nylon Housing (BOX) and an overlapped operating and reset path.

Improved LED View Window
Keycap Compatible LED Window

The Box Masters V2 series is still relatively new and hasn't fully hit stores yet. We didn't like the V2 as their viewing window for LEDs could jam on certain keycaps, so we declined to feature them. V3 has an improved tapered LED window to prevent keycap compatibility issues seen in previous Masters.

Sound Reduction
An improvement on the BOX Silent series, the V3 Master design mitigates both downstroke and upstroke noise. We take the same circular stem dust wall design from our popular BOX Silent switches from Kailh, upgraded the stem material, and apply enhanced sound absorption using novel TPE/Stainless Steel blends. Unlike the BOX Silent switches the stem has no integrated padding, increasing compatibility with other stems for franken-switches. Noise levels from the Kailh lab measured an exceptionally silent, ≤ 35db*.

The V3 retooling comes with even higher tolerances (including production QA). Switch quality is significantly upgraded, full copper alloy plates with composite gold contacts. 

BOX Housing rated at IP54 (except terminals). The switch uses a 3-pin bottom housing to ensure high plug-and-playability.

These switches have a 100 Million Activation Life Expectancy and are IP54 - except terminals. 

These switches are packed in a protective tin and include a switch puller.

Customer Reviews

Based on 17 reviews
Abe Normal
The. Best.

I embarked on my keyboard build mostly in part because my Bloody keyboard with lightstrike switches sounded like I was riding a horse in the room and I didn't feel like getting divorced. Massive research led me to these and I have got to say they are brilliant. The feel is so smooth. The actuation is just right. The noise dampening is incredible. Installed on a Drop CTRL w/ Phantom stabilizers and my furious gaming moments sound like little mice tapping feet. Brilliant. Not a single bad switch in the bunch. The tin is nice and now holds all my keyboard cleaning / pulling accessories. Shipping arrived earlier than expected and packaged well. Great shopping experience and I love typing / gaming with these switches.

Ethan M
Incredible service and switches

The switches arrived in two days, and in a secure package. The tin they came in is great, and it came with a switch puller as well. The switches themselves are incredible, while they aren't the quietest silent I've tried, I love the shorter bottom out distance and the quiet thock they make. Great purchase, highly recommend.

Jon Smith
Excellent switches

Shipping was fast, switches feel great. I'm a tactile switch usually but I went with these linear switches for the office. I had done some research online and couldn't find any negative feedback about these, but i was still skeptical that i would like these. I am very happy with the smoothness and feel of these and highly recommend them for anyone looking for quiet switches.


These are excellent silent switches. Crisp, responsive feel, especially for a silent linear switch, and a notable improvement over silent black/reds. The sound dampening is also very good; these are truly silent switches.

Ordering and shipping was superb. Everything was well packaged and shipped and delivered quickly. 10/10, would buy again.

Wonderful Switches and Wonderful Service

I am amazed by these switches! I replaced my cherry silent reds with these and I am never going back, these are smooth to type on, have a lovely sound, are incredibly consistent, and did I mention that spacebar thock? I’ve actually been doing my paperwork just because I want to keep typing - and these bad boys feel good even after several hours of extended typing with considerably less fatigue than I had been experiencing with my cherry’s.

SwitchCaptain sent them in no time at all and it even arrived three days early. I love the reusable tin they package them in as well, it’s very cute and useful! SwitchCaptain will definitely be my preferred switch shopping spot after this.