Product overview
The HAKRC 4-axis distribution board, designated 7155B-B13 12S, distributes power to quadcopter electronics through an external step-down switching BEC built around an L5013C chip. It accepts 8.4~50.8 V from 2-12S LiPo batteries, while 12V output requires 4S~12S LiPo input. Two independently operating 5V outputs can power receivers or flight controllers; dual 12V outputs can supply gimbals, video transmission systems, high-voltage servos, lights and payload release devices under that input requirement. BEC ratings are 5V 3.5A and 12V 3.5A, with conversion efficiency of ≤95%.
The board occupies 65x65x10mm, weighs 26g and uses mounting hole spacing of 30.5mm-30.5mm. Its configuration includes a 15cm XT9 input cable with one red/black pair of 8AWG silicone wires, a 63V2000UF capacitor and a 10P-to-8P cable. A built-in current sensor and M1-M8 communication port support integration. Continuous current is 120A and peak current is 130A. Protection covers output short circuits and main-chip over-current and over-temperature. Battery wiring must connect red to positive and black to negative: reversed input polarity will damage the board.
Specifications
| Specification | Value & conditions |
|---|---|
| Brand and model | HAKRC — HAKRC 4-axis distribution board |
| Board designation | HAKRC 7155B-B13 12S |
| Power architecture | External step-down device using an L5013C chip |
| BEC type | Step-down switching BEC |
| Product size | 65x65x10mm |
| Mounting hole spacing | 30.5mm-30.5mm |
| Net weight | 26g |
| Continuous current | 120A |
| Peak current | 130A |
| Input voltage range | 8.4~50.8 V (2-12S LiPo)2-12S LiPo battery input. |
| Output channel 1 | 5V, 12V12V output requires 4S~12S LiPo input. |
| Output channel 2 | 5V (fixed), 0~3.5A 12V 0-3.5A12V output requires 4S~12S LiPo input. |
| BEC output ratings | BEC 5V 3.5A / BEC 12V 3.5A12V output requires 4S~12S LiPo input. |
| Output arrangement | Two independently operating 5V outputs and dual 12V outputs12V output requires 4S~12S LiPo input. |
| Conversion efficiency | ≤95% |
| Static power consumption | 1mA |
| Ammeter ratio | 50 |
| Input cable and accessories | 15cm input cable with XT9 connector and one red/black pair of 8AWG silicone wires; 63V2000UF capacitor; 10P-to-8P cable |
| Communication port | M1-M8 |
| Current sensor | Built-in current sensor |
| Adapter marking | RX Adapter TX (4 ports) |
| Protection functions | Output short-circuit protection; main-chip over-current and over-temperature protection |
| Battery requirement for 12V output | 4S~12S LiPo input requiredWhen 12V output is required. |
| Reverse-polarity limitation | Reversing battery input polarity will damage the distribution board.Battery input connection: red to positive and black to negative. |
