Quick Answer
The Holybro Kakute H7 and Kakute H7 Mini share the same fast H7 processor, but the Mini is built for smaller 20x20mm and 25.5x25.5mm frames with fewer ports, while the full-size H7 fits 30.5x30.5mm stacks and offers more UARTs and connections. Pick the Mini for compact builds, and the full-size board for larger 5-inch and 7-inch drones that need more room for extra devices.
Same Processor, Different Purpose
Both boards use the H7 processor family, so they share similar raw processing power, loop rates and memory. This means the choice between them is not really about performance. It is about which one fits your frame and how many devices you need to connect. If you want the background on why H7 matters, see our comparison of F4, F7 and H7 flight controllers.
Mounting Size and Frame Fit
The clearest difference is physical size.
- Kakute H7 Mini uses a 20x20mm mounting pattern (some versions also fit 25.5x25.5mm with adapter holes), aimed at 3-inch and small 5-inch builds where space is tight.
- Kakute H7 (full-size) uses the larger 30.5x30.5mm mounting pattern common on 5-inch and 7-inch frames.
If your frame's arms or stack space only fit a small board, the Mini is the only realistic option, regardless of other specs.
Ports and Connections
Because the full-size Kakute H7 has more physical space, it generally includes more UARTs and connection points than the Mini. This matters if your build has several devices that all need a serial connection, such as a digital video system, a GPS module and a telemetry radio at the same time.
The Mini still includes enough UARTs for a typical freestyle setup with a receiver and a digital VTX, but it has less room for extra devices. If you are planning a build with a full digital air unit like the DJI O4 plus GPS, check the exact UART count on the specific Mini revision before you commit.
Voltage Input
Both boards are generally rated to accept higher-voltage batteries, which suits builds running 6S packs. Always check the exact voltage rating on the current product page for the specific revision you are buying, since input ratings can change slightly between hardware versions.
Bluetooth and Convenience Features
Some Kakute H7 boards include built-in Bluetooth, which lets you connect to the Betaflight configurator from a phone or laptop without plugging in a USB cable. This is a small but genuinely useful feature for quick setting checks at the field.
Not every version of either board includes Bluetooth, so check the specific model name carefully. Holybro has released several revisions of both the H7 and H7 Mini over time, and features can differ between them.
Comparing the Two Boards
| Feature | Kakute H7 Mini | Kakute H7 (full-size) |
|---|---|---|
| Mounting size | 20x20mm (some 25.5mm options) | 30.5x30.5mm |
| Best frame size | 3-inch, small 5-inch | 5-inch, 7-inch |
| UART count | Fewer, enough for basic setups | More, suited to extra devices |
| Processor | H7 | H7 |
| Typical use case | Compact freestyle builds | Freestyle with GPS, digital video, or extra sensors |
Which Builds Fit Each Board
Choose the Kakute H7 Mini if:
- Your frame only has room for a 20x20mm or 25.5x25.5mm stack
- You are building a compact 3-inch or lightweight 5-inch freestyle quad
- Your device list is simple: a receiver and one video system
Choose the full-size Kakute H7 if:
- Your frame uses the standard 30.5x30.5mm mounting pattern
- You need extra UARTs for GPS, telemetry, or a full digital air unit
- You are building a larger 5-inch or 7-inch drone with room to spare
Firmware Support
Both boards run Betaflight without issue, since that is the standard firmware for freestyle-oriented H7 boards from Holybro. If you plan to run GPS missions instead, check the current firmware target list, since not every H7 board has equal INAV or ArduPilot support. Our Betaflight setup guide is a good starting point once your board arrives.
A Note on Buying the Right Revision
Holybro has released more than one version of both the Kakute H7 and the H7 Mini over the years. Port layout, voltage rating and Bluetooth support have all changed slightly between revisions. Always read the exact product listing and manual for the board you are about to buy, rather than assuming it matches an older review or an FAQ answer you saw somewhere else. This small check can save a lot of wiring confusion later.
Final Thoughts
The decision between these two boards usually comes down to your frame size before anything else. Once you know your mounting pattern, the choice narrows quickly. From there, count your UARTs and check the exact voltage rating and Bluetooth support on the specific revision you are considering, since Holybro updates these boards over time. For the wider picture on what to check across any flight controller, our flight controller buying guide covers the full checklist.