HAKRC 8B35A 35A 4in1 Brushless ESC User Manual

1. Introduction

The HAKRC 8B35A 35A 4in1 Brushless ESC is a high-performance Electronic Speed Controller designed for RC FPV freestyle and racing drones. Featuring imported Japanese MOS transistors, a three-in-one IC drive (FD6288Q), and high-quality Murata capacitors, this ESC is built on a 6-layer resin plug-hole PCB for reduced heat generation and improved efficiency. It supports a wide range of digital and analog protocols, making it versatile for various flight controller setups.

2. Safety Information

Please read and understand all instructions before operating this product. Improper use can lead to damage, injury, or property loss. This device is intended for users aged 14 years and older.

• Always disconnect the battery before performing any maintenance or installation.
• Ensure correct polarity when connecting power. Incorrect connections will damage the ESC.
• Avoid short circuits. Double-check all connections before applying power.
• Keep the ESC away from water, moisture, and extreme temperatures.
• Do not modify the ESC. Unauthorized modifications will void the warranty and may cause malfunction.
• Ensure adequate airflow around the ESC during operation to prevent overheating.
• Handle with care to avoid damaging sensitive electronic components.

3. Package Contents

Verify that all items are present in your package:

• 1x HAKRC 8B35A 35A 4in1 Brushless ESC
• 1x Electrolytic Capacitor
• 1x XT60 Power Connector
• 2x Silicone Power Wires (Red and Blue)
• 1x Signal Cable (Multi-color)
• 4x Yellow Rubber Grommets/Spacers

4. Specifications

5. Setup and Installation

Careful installation is crucial for the proper functioning and longevity of your ESC. Follow these steps:

1. Mounting the ESC

   The HAKRC 8B35A ESC features a 20mm x 20mm mounting hole pattern. Use the provided yellow rubber grommets/spacers to isolate the ESC from vibrations and prevent short circuits with the frame. Ensure the ESC is securely mounted, typically as part of a flight stack with a compatible flight controller.

   

2. Wiring Connections

   Refer to the wiring diagram below for proper connections. Solder the main power wires (red for positive, blue for negative) to the designated '+' and '-' pads. Connect the four motor wires (M1, M2, M3, M4) to your brushless motors. Use the included signal cable to connect the ESC to your flight controller's corresponding signal and telemetry pads. The capacitor should be soldered to the main battery pads for filtering power noise.

   

   • Power Input: Connect your battery's positive (+) and negative (-) leads to the large pads marked '+' and '-' on the ESC.
   • Motor Connections: Solder motor wires to M1, M2, M3, M4 pads. The order may need adjustment in software for correct motor direction.
   • Signal/Telemetry: Use the provided cable to connect the ESC's signal pads (1, 2, 3, 4) and telemetry (CURR) to your flight controller. The '+' and '-' pads on the signal connector provide 5V and GND for the flight controller.
   • Capacitor: Solder the included electrolytic capacitor to the main battery pads, ensuring correct polarity (long lead is positive).

6. Operating Instructions

Once the ESC is physically installed and wired, configure it using appropriate software:

1. Firmware Configuration

   The HAKRC 8B35A ESC comes pre-flashed with BLHeli_S firmware (G_ H_ 20- Rev. 16.7- Multi). Connect your flight controller to a computer and use the BLHeliSuite32 or Betaflight Configurator (if your FC supports passthrough) to access and configure the ESCs. You can adjust settings such as motor direction, Damped Light mode, and various timing options.

2. Protocol Selection

   This ESC supports a wide range of protocols including PWM, Oneshot125, Oneshot42, Multishot, Dshot150, Dshot300, and Dshot600. For optimal performance and reliability, Dshot600 is generally recommended when supported by your flight controller.

3. Motor Direction

   After initial setup, verify motor direction in your flight controller's software (e.g., Betaflight Motors tab). If a motor spins in the wrong direction, reverse it in the BLHeliSuite32 software or by swapping any two motor wires.

7. Maintenance

Proper maintenance ensures the longevity and reliability of your ESC:

• Regular Inspection: Periodically check for loose solder joints, damaged wires, or signs of physical damage.
• Cleaning: Keep the ESC free from dust, dirt, and debris. Use a soft brush or compressed air for cleaning. Avoid using liquids.
• Heat Management: Ensure the ESC has adequate airflow during operation. Avoid covering it with excessive tape or components that restrict cooling.
• Firmware Updates: Check for new BLHeli_S firmware versions periodically. Updating can improve performance and fix bugs.

8. Troubleshooting

Here are some common issues and their potential solutions:

9. User Tips

• Solder Quality: Always ensure clean and strong solder joints for all connections, especially power and motor wires, to prevent intermittent issues or failures.
• Capacitor Installation: Do not skip installing the included electrolytic capacitor. It helps filter electrical noise from the battery, protecting the ESC and other sensitive electronics.
• Motor Wire Length: Keep motor wires as short as possible to minimize electrical interference and improve efficiency.
• Testing: Before flying, always perform a bench test with propellers removed to verify motor direction and smooth operation.

10. Warranty and Support

HAKRC products are manufactured to high standards. In the unlikely event of a manufacturing defect, please contact your retailer for support. Please note that damage caused by improper installation, misuse, or unauthorized modification is not covered under warranty. Keep your proof of purchase for any warranty claims.