MAD MAX20 400A HV 6-12S Sensored Brushless ESC w/ Bluetooth, IP67, 10A/25A BEC for 1/5 RC Car

Overview

MAD MAX20 is a high-voltage (HV) electronic speed controller (ESC) for RC model car applications, specified for 6~12S LiPo power and 400A continuous current. It supports sensored or sensorless square-wave control of brushless motors, built-in Bluetooth connection to a mobile app, and adjustable BEC voltage.

Key Features

• 400A continuous current; current control similar to wave-by-wave current limiting to limit peak current and help avoid motor damage
• Power supply: 6~12S LiPo
• Supports sensored or sensorless square-wave control of brushless motors
• Max electric speed: 240,000 rpm (electric speed); motor-speed relationship depends on pole pairs
• BEC voltage selectable via mobile app: 6.0V / 7.4V / 8.4V; BEC current: 10A continuous, 25A short-term
• Fan intelligent start/stop thresholds: fan ON at > 55°C, fan OFF at < 50°C; fan power may be cut during large current abnormality
• Built-in Bluetooth: parameter adjustment, firmware upgrade, and motor operation data observation (data log and real-time data)
• High-power DC conversion circuit for BEC loading capability
• Protection functions: low voltage, over voltage, throttle loss, abnormal braking, over temperature, etc.
• Turbo timing available (max support 26° shown in product parameters)
• Supports X.BUS protocol for real-time control and operation data reading through bus; can be used for automation/robot programming control
• All-weather operation capability: IP67 protection rating (waterproof and dustproof)
• Working environment temperature: -20~65°C

For pre-sales compatibility questions (battery, motor, wiring, and app use) or after-sales support, contact support@rcdrone.top or visit https://rcdrone.top/.

Specifications

Motor Speed Note

• When the number of pole pairs is 1, electrical speed equals mechanical speed.
• Electrical speed = Mechanical speed × Number of pole pairs = KV value × Bus voltage × Number of pole pairs.
• Motor speed can be very high when idling; use caution.

Bluetooth (Mobile App)

• All ESC parameters can be adjusted via the mobile app.
• ESC firmware can be upgraded via the mobile app.
• Motor operation data observation: data log (static data) and real-time debugging data.

Bluetooth name rule: “approximate model” + “-” + “ESC code ID”. Example: “XC_E3-1C89”, where XC_E3 is the approximate model and “1C-89” is the hexadecimal code ID. Even if the name is customized, the ESC code ID is retained to help avoid duplicate names.

Connections

• Switch wire: red and black
• Throttle wire: red: BEC+, black: BEC-, white: throttle
• X.BUS wire: red: BEC+, brown: BEC-, yellow: X.BUS

Configurable Items (App/ESC)

Running Mode Details

• Option 1: Forward with brake — vehicle moves forward and has brake function (commonly accepted in races).
• Option 2: Forward/Reverse and Brake — “training” mode. First reverse-zone trigger applies brake; reverse engages after returning to neutral and re-triggering reverse when the motor has stopped. Designed to help prevent accidental reverse.
• Option 3: Forward and Reverse — motor reverses when throttle moves from neutral to reverse point; generally used in special vehicles.

Start Process

1. Check whether the circuit is open, short circuit, or in poor contact.
2. Check whether the motor is stuck.
3. Plug in the power cable.
4. Turn on the power button. When the battery prompt tone is heard (normal startup prompt), startup is normal. If throttle is normal, operate normally.

Set the Throttle Range

1. Keep the ESC off. Move the throttle to the end point of reversal. Power up ESC. Wait for the red and green lights to stop flashing (about 5 seconds).
2. Move the throttle to the end point of forward within 1 second and hold. Wait for the green light to stop flashing.
3. Move the throttle to the neutral position within 1 second and hold. Wait for the red light to stop flashing.
4. Success prompt: repeats four times (red and green lights on + motor beep “so, mi, do” + red/green lights off + 0.2 s vacancy). Failure prompt: no signs; ESC powers on.

Recover Factory Parameters

Restore Bluetooth to factory settings

1. Connect ESC wire (the white wire) to BEC+ (red wire).
2. Turn on ESC.
3. Disconnect from BEC when green light is off and red light is on.
4. Remove the short circuit.

When boot is activated, Bluetooth restores to factory value (password restored to 1234 and name restored to factory state). Restart ESC. If there is a hardware error, boot can be activated in this way to upgrade hardware.

Restore parameters to factory settings

Click the default button on the app parameter page.

LED Status & Beep Instructions

Notes:
1) Red light matches long tone; green light matches short tone.
2) For saving power, all “beeps” last for 5 minutes; if all faults are recovered, it takes effect again in the next 5 minutes.
3) Ellipsis “...” in light cue represents repetition of previous action.

Precautions

1. Do not connect ESC input wires DC+ and DC- in reverse. Reverse connection may damage the ESC; warranty service is not provided in this case.
2. If a Hall sensor is used, check the motor phase wires and Hall wiring.
3. For motors without temperature sensors, long-term high-power operation may cause burnout.
4. Some motor mechanical structures cannot support high speed; forcing higher speed may damage the motor.
5. If not used for more than 1 hour, unplug the ESC power wires.
6. If any connection line modifications are made, check the circuit carefully before use. Open the throttle slowly and confirm no errors before normal operation.

Throttle Calibration (Video)

Details

MAD MAX20 400A HV ESC features a fan-cooled case, heavy-gauge power leads, and clear 6–12S LiPo and 10–25A BEC labeling for setup.

The MAD MAX20 HV sensored brushless ESC uses an intelligent cooling fan that starts and stops automatically to help manage temperatures.

The MAD MAX20 ESC includes built-in Bluetooth for direct mobile app connection for parameter setting, data reading, and firmware upgrades.

Built-in real-time data recording lets you review operating status through an app-style graph for easier tuning and troubleshooting.

The built-in BEC supports up to 25A output with selectable 6V, 7.4V, or 8.4V to power compatible high-voltage servos.

The MAD MAX20 HV sensored brushless ESC features an IP67 protection rating for more confident use in wet and dusty conditions.

MAD MAX20 400A ESC for model cars uses a fan-cooled heatsink design with thick power leads and sensor wiring for 6–12S LiPo setups.

The MAD MAX20 400A HV sensored brushless ESC is IP67-rated and lists 400A continuous current with a 10A–25A max BEC and 7AWG/8.0mm motor cabling.

The MAD MAX20 400A HV sensored ESC wiring layout shows connections for the motor sensor lead, throttle/BEC lead, and battery inputs for a clean, organized install.

The MAD MAX20 ESC uses a simple throttle calibration sequence, using red/green LED prompts while moving the throttle from full to neutral.