Product overview
The HAKRC F7251 flight controller combines an STM32F722RET6 CPU, ICM42688 IMU, AT7456E OSD and integrated barometer with 16M Flash blackbox storage. Its 36×36mm board has 30.5mm×30.5mm mounting hole spacing. Construction uses six PCB layers, 1oz copper foil and a resin plug-hole process, alongside an industrial-grade LDO and Japanese Murata filtering capacitors. Multiple pin header connectors come pre-installed for solder-free plug-in connections. Net weight has conflicting specifications of 8.6g and 8.5g; input ratings likewise conflict between 2S–8S LiPo and 2S-6S Lipo.
Integration provisions include eight motor control signal outputs, six UART channels and BEC outputs rated at 5V/3A and 12V/2.5A. A reserved 12V output powers external LED strips, with on/off control assignable to custom transmitter channels. VTX power switching is configurable through ground station software for ground parameter tuning. The default firmware is HAKRCF722V2, with Betaflight and INAV supported. Receiver protocol support covers Frsky, Flysky, TBS, CRSF and SBUS. Packaging measures 64 * 64 * 35mm, with a specified packaging weight of 40g.
Specifications
| Specification | Value & conditions |
|---|---|
| Brand | HAKRC |
| Model | HAKRC F7251 |
| Product dimensions and mounting | 36×36mm (30.5mm×30.5mm mounting hole spacing) |
| Input voltage, conflicting ratings | 2S–8S LiPo and 2S-6S Lipo; conflicting input ratings |
| Net weight, conflicting values | 8.6g and 8.5g; conflicting net weights |
| Packaging dimensions | 64 * 64 * 35mm |
| Packaging weight | 40g |
| CPU | STM32F722RET6 |
| IMU | ICM42688 |
| OSD | AT7456E |
| Barometer | Onboard integrated |
| Blackbox | 16M Flash |
| BEC output | 5V/3A & 12V/2.5A |
| UART ports | 6 channels |
| Default firmware | HAKRCF722V2 |
| Supported firmware | Betaflight, INAV |
| Supported receiver protocols | Frsky, Flysky, TBS, CRSF, SBUS |
| PCB construction | 6-layer PCB with 1oz copper foil and resin plug-hole process |
| LDO | Industrial-grade LDO |
| Pre-installed connectors | Multiple pre-installed pin header connectors for plug-in installation without soldering |
| LED power output and switching | 12V output with transmitter-channel LED on/off controlFor external LED strips; LED on/off assignable to custom transmitter channels. |
| VTX power control | Switchable VTX power supply for ground parameter tuningSwitch channels configured in ground station software. |
| Filtering capacitors | Japanese Murata capacitors |
| Motor control signal outputs | 8 channels |
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