Sound profile
Third-party reviewers describe Fire Phoenix as leaning deeper and more muted; final sound is build-dependent and KeebPilot has not published an in-house acoustic measurement.
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Linear
HMX Fire Phoenix Linear Switch
At a glance
Key specifications
The most important verified numbers for this product, shown before the deeper sections.
37 gfOperating force
3.6 mmTotal travel
LinearSwitch type
5-pinMount
YesFactory lubed
Other verifiedStem material
42 gfBottom-out force
Deep/muted-leaning; build-dependent; not KeebPilot-testedSound profile
Character
Sound & feel
How this product sounds and feels to type on, described in plain terms.
Typing feel
Light linear weighting with 37gf operating force, 42gf bottom-out and a 22mm single-stage spring.
Fit & build
Compatibility & build notes
What to check before ordering, and how the build is put together.
Linear
5-pin PCB Mount
Factory Lubed
Other verified Stem
Compatibility
Fire Phoenix uses a five-pin MX-style footprint. Confirm that the PCB and hot-swap socket accept the two locating pins before ordering a full set. 5-pin mount — confirm PCB and plate support for your board.
Build notes
This switch uses a 5-pin footprint. Confirm that your PCB or hot-swap socket accepts this 5-pin mechanical-switch mount; the pin count alone does not guarantee compatibility with every hot-swap board. Choose 10 switches for sampling or replacements, 35 for partial builds, or 70 as a starting quantity for many compact boards, then count your actual switch positions and add any spares you want.
Fit & trade-offs
Decide quickly whether this product fits your build
A strong fit if you want
✓
Light linear switch builds / Users who prefer lower spring resistance / Custom keyboards with compatible 5-pin switch support
Consider alternatives if you prefer
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A different switch type
If you need tactile feedback or a silent build, compare other families.
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A specific force target
Pick a switch whose operating force matches your preference.
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Another build use case
Match the product to how and where you actually type.
Sizing help
How many switches do you need?
Switch count depends on your keyboard's layout. The typical ranges below are a starting point — the exact number depends on the specific model and any extra keys.
60%
61 – 68 keys
Recommended 65%
66 – 75 keys
75%
81 – 88 keys
TKL
87 – 92 keys
Full-size
104 – 110 keys
This product is available in packs of 10 / 35 / 70 switches — pick a pack that covers your layout with a small margin for testing or replacements.
Exact switch count depends on keyboard model / layout (and any novelties or extra keys). Always confirm against your board's official key count before ordering.
Product deep dive
Understand the product before you choose it
Focused sections explain the details buyers care about, supported by the product's specification data.
LIGHT LINEAR
Low spring resistance for repeated presses
HMX Fire Phoenix uses 37gf operating force and 42gf bottom-out, placing it firmly in a light linear direction.
It is for buyers who want easy repeated inputs rather than a resistant or tactile keypress.
- Linear mechanism
- 37gf ±5gf operating force
- 42gf ±5gf bottom-out force
Best Fit: A low-resistance linear for an easy press.
FORCE & TRAVEL
Why the light stroke matters
Fire Phoenix pairs a 22mm single-stage spring with approximately 3.6mm total travel. For buyers, those numbers matter because they describe its light linear stroke; the T5 / PA12 / P4 material stack belongs in the specifications rather than being used to predict sound.
The practical choice is whether its low force and travel suit the build; final sound still depends on the keyboard around it.
- 3.6mm ±0.3mm total travel
- 22mm single-stage spring
- T5 / PA12 / P4 material stack
What it means: Force and travel are the clearer buying signals.
FIVE-PIN FIT
Confirm the footprint before the pack
Fire Phoenix uses a five-pin MX-style footprint. Confirm that the PCB and hot-swap socket accept the two locating pins before selecting a full-build quantity.
Count the keyboard’s switch positions and add spares only if you want them.
- 10 switches — sample / replacements
- 35 switches — partial builds
- 70 switches — many compact builds
Build note: Verify five-pin fit before ordering.
WHEN TO CHOOSE IT
Pick Fire Phoenix for an easy press
Choose Fire Phoenix when low spring resistance is the priority and you want a light linear press for repeated inputs.
Choose a firmer linear if you prefer more resistance under the fingers, or a tactile switch if you want a distinct bump.
- 37gf ±5gf operating force
- 3.6mm ±0.3mm total travel
- 5-pin mount — verify PCB/socket
Decision note: Choose Fire Phoenix for lightness, not firmness.
Decision support
Open full comparison →
Compare HMX Fire Phoenix Linear Switch with realistic alternatives
The goal is to make the key trade-offs visible: weight, travel, stock preparation, sound direction, and the type of user each product serves best.
Specifications
Type
Linear
Linear
Linear
Linear
Operating Force
37 gf
30
40
40 gf
Bottom-out Force
42 gf
40
50
—
Total Travel
3.6 mm
3.2
3.3
3.4 ± 0.2 mm
Sound Profile
Deep/muted-leaning; build-dependent; not KeebPilot-tested
Build-dependent; dual back-covered design targets mechanical-like acoustics
Muted, low-noise and office-friendly
—
Factory Lubed
Yes
Yes
Yes
Yes
Mount
5-pin
5-pin
5-pin
5-pin
Stem Material
Other verified
—
POM
POM
Best For
—
—
—
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Structured product data
Detailed specifications
General
- Brand
- HMX
- Switch type
- Linear
- Mount
- 5-pin
- Factory lubed
- Yes
Performance
- Operating force
- 37 gf
- Bottom-out force
- 42 gf
- Pre-travel
- 2 mm
- Total travel
- 3.6 mm
- Sound profile
- Deep/muted-leaning; build-dependent; not KeebPilot-tested
- Typing feel
- Light linear weighting based on 37gf operating / 42gf bottom-out specs
Construction
- Stem material
- Other verified
- Top housing
- PA12 modified nylon
- Bottom housing
- P4 nylon
Compatibility
- PCB mount
- 5-pin
In the box
What's in the box
Exactly what ships with this product. The switch count and color update with the options you select.
Selected pack
10
switchs
- Included switches10 switchs
- Selected color—
Product-specific FAQ
Frequently Asked Questions
Straight answers to the questions that most often decide a purchase.
Yes. The current product specification identifies Fire Phoenix as a linear mechanical keyboard switch.
The stated operating force is 37gf ±5gf, with a stated bottom-out force of 42gf ±5gf.
The published specification lists approximately 2.0mm ±0.5mm pre-travel and 3.6mm ±0.3mm total travel.
Yes. The Fire Phoenix launch version is factory-lubed.
Yes. Fire Phoenix is a 5-pin switch. Check your keyboard PCB/socket before ordering.
That depends on the keyboard. A switch being 5-pin does not by itself confirm compatibility with every hot-swap socket. Verify the PCB/socket specification before purchase.
The available specification lists a T5 custom stem material, PA12 modified-nylon top housing, and P4 nylon bottom housing.
Third-party reviewers describe it as leaning deeper and more muted, but switch sound changes significantly with the case, plate, keycaps, mounting system and dampening. KeebPilot has not published an in-house acoustic measurement for this switch.
Ready to build with HMX Fire Phoenix Linear Switch?
Choose the option for your build, add it to your cart, or compare before ordering.