Pixhawk 6 vs 6C vs 6X vs Mini: Which Flight Controller?
Quick Answer
Choose the Pixhawk 6C for most conventional multirotors and fixed-wing aircraft. Move to the 6X when you genuinely need triple IMUs, dual barometers, Ethernet or a companion-computer baseboard. Choose the 6C Mini only when the standard 6C will not fit; the Mini saves length and ports, not much weight.
Pixhawk 6C vs 6X vs 6C Mini
There is no current product called simply “Pixhawk 6”. Holybro’s range splits into the integrated FMUv6C boards and the modular FMUv6X boards. If those names are new to you, start with our explanation of what Pixhawk is and what it does.
The processor headline does not decide this purchase. All three run an Arm Cortex-M7 at 480MHz with 2MB flash and 1MB RAM. The useful differences are sensor redundancy, connector count, power monitoring and packaging.
| Decision point | Pixhawk 6C | Pixhawk 6C Mini | Pixhawk 6X Rev8 |
|---|---|---|---|
| Processor | STM32H743 | STM32H743 | STM32H753 |
| IMUs | ICM-42688-P + BMI088 | ICM-42688-P + BMI088 | 3 × ICM-45686 |
| Barometers | 1 × MS5611 | 1 × MS5611 | 2: ICP20100 + BMP388/BMP580, revision-dependent |
| General serial ports | 3 | 2 | 4 |
| GPS / CAN | 2 / 2 | 2 / 2 | 2 / 2 |
| PWM outputs | 16 | 14 | 16 |
| Power inputs | 2 analogue | 1 analogue | 2 digital SMBus |
| Ethernet | No | No | 100Mbps |
| Published size | 84.8 × 44 × 12.4mm | Current Model A: 54.3 × 39 × 17.5mm | Current store listing: 38.8 × 31.8 × 16.8mm module; 52.4 × 102 × 16.7mm standard baseboard |
| Published weight | 59.3g aluminium; 34.6g plastic | 42.4g current Model A; 46.8g Model B | Current store listing: 31.3g module + 72.5g aluminium standard baseboard |
Why the 6C Is Our Default
The Pixhawk 6C retains dual isolated IMUs, 16 PWM outputs, two CAN buses and two power inputs without requiring a carrier board. Current units use the BMI088 rather than the discontinued BMI055 found in older comparisons.
For a conventional mapping wing or multirotor, we would spend the system budget on clean power, GNSS and telemetry before paying for unused Ethernet or a third IMU. The PM08-CAN DroneCAN power module is one route to digital voltage and current data when the 6C’s analogue power inputs are not enough.
When the 6X Earns Its Place
The 6X is a module plus baseboard, not a smaller drop-in 6C. Holybro’s current store specification totals 103.8g for its 31.3g module and 72.5g aluminium standard baseboard; the technical documentation still shows lighter 23g and 51g figures, so confirm the supplied revision before fixing a weight budget. Current Rev8 hardware adds three ICM-45686 IMUs, two barometers, four general serial ports, digital power inputs and 100Mbps Ethernet.
That architecture makes sense for a companion computer, extra payload interfaces or a project with a written redundancy requirement. The Pixhawk 6X Pro keeps the same STM32H753 and baseboard system but uses vibration-isolated ADIS16470 and IIM-42652 industrial IMUs alongside an ICM-45686. It is not faster than the standard 6X; buy it for those sensors, not the word “Pro”. A Holybro Microhard V2 telemetry radio is the sort of payload that can justify this wider interface budget.
What the 6C Mini Actually Saves
The Mini shortens the controller to 54.3mm in current Model A form and places the PWM header on the board. It still keeps dual IMUs, dual CAN and two GPS ports, but drops to two general serial ports, one power input and 14 PWM outputs.
Do not choose it by the word “Mini” alone. At 42.4g for current Model A, it is heavier than the plastic-cased 6C specification and only 16.9g lighter than the aluminium 6C. We recommend it when board length or direct PWM wiring is the constraint, not as an automatic lightweight upgrade.
FAQ
Q: Which is better, Pixhawk 6C or 6X?
A: The 6C is the better default for a self-contained aircraft. The 6X is better when Ethernet, digital power, carrier-board expansion or triple sensor redundancy is a defined requirement.
Q: Can all three run ArduPilot and PX4?
A: Yes. Holybro documents PX4 and ArduPilot support for the 6C, 6C Mini and 6X. Use the exact board target and follow the firmware project’s current installation instructions.
Q: Is the 6C Mini the lightest?
A: Not in every comparison. Holybro lists current Model A at 42.4g, while the plastic-cased 6C is listed at 34.6g. Compare the exact case, board revision, breakout hardware and cables you will install.
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