The GATERON Magnetic Black Lotus HE Switch is not simply a mechanical switch with a magnet added to the stem. Its behavior is determined by the interaction between mechanical travel, spring force, magnetic flux, Hall sensor position, PCB geometry and keyboard firmware.
For keyboard developers and HE enthusiasts, this system-level relationship matters more than a single "0.1mm actuation" specification.
The GATERON Magnetic Black Lotus HE Switch combines:
- Freely adjustable pre-travel on a compatible HE platform
- 100±8GS initial magnetic flux
- 700±30GS bottom-out magnetic flux
- Pre-lubricated linear construction
- Cylindrical stem architecture
These specifications define how the switch moves mechanically and how its magnet interacts with the Hall Effect sensing system.
How the GATERON Magnetic Black Lotus HE Switch Detects Input
A conventional mechanical switch usually changes from OFF to ON when two electrical contacts meet. A Hall Effect keyboard does not need this fixed electrical contact point.
Instead, the signal chain is:
Stem travel → Magnet movement → Magnetic field change → Hall sensor output → Firmware position calculation → Actuation
This distinction enables an HE keyboard to determine where the key is within its travel, rather than simply whether an electrical contact is open or closed.
That is why the GATERON Magnetic Black Lotus HE Switch can support adjustable actuation when paired with compatible hardware and firmware.
However, the switch alone does not determine actuation accuracy. The complete system includes:
- Magnetic characteristics of the switch
- Hall sensor sensitivity and position
- Magnet-to-sensor distance
- ADC and controller implementation
- Actuation and reset algorithms
This is also why magnetic switch compatibility should be treated as an electricalmechanical system question, not merely a socket-fit question.
Key Engineering Specifications
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Parameter
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GATERON Magnetic Black Lotus HE Switch
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Engineering Relevance
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Switch Type
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Linear magnetic
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Continuous mechanical movement
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Initial Force
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35gf
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Resistance at the beginning of travel
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Bottom-Out Force
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45gf
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Resistance near full depression
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Total Travel
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4.0mm
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Available mechanical movement range
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Pre-Travel
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Adjustable
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Software-defined trigger position
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Initial Flux
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100±8GS
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Magnetic field near upper travel
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Bottom-Out Flux
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700±30GS
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Magnetic field near full travel
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PCB Reference
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1.2mm
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Defines measurement geometry
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Lubrication
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Pre-lubed
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Controls stem/surface friction
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The important point is that these figures should be evaluated together rather than independently.
4.0mm Travel Does Not Mean a 4.0mm Actuation Point
The GATERON Magnetic Black Lotus HE Switch provides 4.0mm of total physical travel, but actuation can be configured within the available travel range on a supported HE keyboard.
These are two different parameters:
Mechanical Travel
This defines how far the stem can physically move from its upper position to bottom-out.
Electrical Actuation Position
This is the key position at which firmware decides that the input should register.
A shallow setting can be useful for inputs that need minimal finger movement. A deeper actuation point provides a larger physical margin before registration, which can reduce accidental inputs.
Importantly, changing the actuation point does not change the spring curve.
A GATERON Magnetic Black Lotus HE Switch configured to actuate at a shallow position still retains the same mechanical spring characteristics.
Why 35gf and 45gf Should Be Read as a Force Profile
Describing the Black Lotus HE only as a "35gf switch" leaves out part of the mechanical behavior.
Its values indicate:
35gf initial force → Increasing spring resistance → 45gf bottom-out force
This matters because a Hall Effect switch may be configured to register very early in the stroke.
At shallow actuation settings, the user interacts mainly with the upper part of the force curve. At deeper settings, more of the spring progression becomes involved before registration.
For keyboard tuning, buyers should therefore consider three variables together:
- Preferred initial resistance
- Preferred resistance near bottom-out
This gives a more realistic picture of key control than comparing actuation distance alone.
Magnetic Flux Is a System Parameter, Not a Marketing Number
The GATERON Magnetic Black Lotus HE Switch is specified at approximately:
- Measured using a 1.2mm PCB reference
The magnetic signal changes as the magnet approaches the Hall sensor.
Conceptually:
Stem position → Magnet-to-sensor distance → Magnetic flux → Sensor voltage → Digital position value
A stronger reading at bottom-out does not automatically mean "better performance." What matters is whether the keyboard controller can map the magnetic signal consistently across the full stroke.
Why PCB Thickness Matters
Hall sensing is sensitive to physical geometry.
Changing PCB thickness, Hall sensor package height or sensor position changes the effective magnet-to-sensor distance.
That can alter:
- Full-travel magnetic field
This is why GATERON offers magnetic-flux figures together with a PCB reference instead of presenting GS values without measurement context.
Cylindrical Stem Design and Magnet Motion
The GATERON Magnetic Black Lotus HE Switch uses a cylindrical stem architecture designed to provide more continuous support around the stem.
For an HE switch, stem stability has two consequences.
Mechanical Consequence
Reduced lateral movement can provide a more controlled linear stroke, especially during off-center presses.
Magnetic Consequence
Because the magnet moves with the stem, lateral stem movement can also change the magnet's trajectory relative to the Hall sensor.
Ideally, the magnet should follow a repeatable vertical path so that equivalent key positions produce predictable magnetic readings.
This relationship is particularly relevant on frequently used keys and larger stabilized keys where presses may not always occur at the exact center.
Adjustable Actuation and Rapid Trigger Are Different Functions
These two HE features are often grouped together, but they solve different problems.
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Function
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Engineering Question
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Adjustable Actuation
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At what downward position should the key register?
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Reset Point
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At what upward position should the input release?
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Rapid Trigger
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How much movement is required to dynamically trigger and reset again?
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The GATERON Magnetic Black Lotus HE Switch provides the changing magnetic field needed for position sensing on an HE platform, but Rapid Trigger behavior is ultimately determined by keyboard firmware and calibration.
Therefore:
Switch capability ≠ firmware feature implementation.
A buyer should verify both.
GATERON Magnetic Black Lotus HE Switch vs Mechanical Linear Switch
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Design Factor
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Black Lotus HE
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Conventional Linear
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Detection Principle
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Hall Effect
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Metal contact
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Trigger Position
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Software configurable
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Mechanically defined
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Position Measurement
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Continuous position sensing
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Primarily binary
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Hall Sensor
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Required
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Not required
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Calibration
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Important
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Usually unnecessary
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Rapid Trigger
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Platform dependent
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Normally unavailable
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Contact Wear
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No actuation contact required
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Electrical contacts used
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This does not make one architecture universally superior. HE switches are more suitable where analog position sensing and configurable trigger behavior are required, while conventional mechanical switches offer a simpler electrical architecture.
Compatibility Checks Before Installation
Before using the GATERON Magnetic Black Lotus HE Switch, confirm:
- PCB thickness and sensor geometry
- Magnetic-signal compatibility
- Switch housing and plate fit
- Rapid Trigger implementation
Physical fit alone is not enough to confirm HE compatibility.
How to Validate the Switch After Installation
A useful engineering validation process should include:
1. Resting Position
Confirm that every key reports a stable zero or resting value.
2. Full-Travel Detection
Press from rest to bottom-out and check whether the position changes smoothly.
3. Repeated Actuation
Use the same actuation setting and test whether repeated presses trigger consistently.
4. Off-Center Input
Test larger keys from different pressing positions.
5. Rapid Trigger
If supported, verify both downward re-trigger and upward reset behavior.
6. Recalibration
Run the keyboard's calibration procedure after changing magnetic switches.
Selecting the GATERON Magnetic Black Lotus HE Switch
The GATERON Magnetic Black Lotus HE Switch is particularly relevant for HE keyboard designs that require full 4.0mm physical travel, relatively light linear force and configurable magnetic actuation.
The purchasing decision should follow this sequence:
Mechanical feel → Magnetic characteristics → Hall sensor compatibility → Firmware capability → Calibration → Intended input behavior
For keyboard brands, builders and HE users evaluating a full-travel magnetic switch, GATERON provides published force, travel and magnetic-flux data that can be matched against the target keyboard architecture.
For detailed specifications, packaging options and current product information, buyers can review the official GATERON Magnetic Black Lotus HE Switch Set product page before confirming compatibility with their HE platform.
FAQs
Q1. What type of switch is the GATERON Magnetic Black Lotus HE Switch?
It is a linear Hall Effect magnetic switch designed for compatible HE keyboard systems.
Q2. What is the initial force of the GATERON Magnetic Black Lotus HE Switch?
The initial force is 35gf, while the published bottom-out force is 45gf.
Q3. What is the total travel of the GATERON Magnetic Black Lotus HE Switch?
The switch has 4.0mm total travel, providing a full-depth linear stroke.
Q4. Is the actuation point adjustable?
Yes. GATERON's Black Lotus HE supports freely adjustable pre-travel, depending on the compatible keyboard system.
Q5. What magnetic flux does the Black Lotus HE produce?
GATERON specifies 100±8GS initial magnetic flux and 700±30GS bottom-out magnetic flux, referenced to a 1.2mm PCB.
