T-Motor AT40A ESC Electronic Speed Controller for Fixed-Wing Drones, 2-4S LiPo, 40A, 5V/3A BEC

Overview

The T-Motor AT40A ESC (electronic speed controller) is an ESC for fixed-wing drones, supporting 2-4S LiPo battery packs and a 5V/3A BEC output to power a receiver and servos.

Key Features

• Fixed-wing ESC; supports 2-4S battery
• BEC output support (BEC 3A@5V; 5V/3A)
• High-speed throttle response with hardware filtering and synchronous continued current function
• Multiple protection functions described: abnormal voltage, ESC thermal, battery low-voltage, and throttle signal loss
• Multiple programmable parameters; supports LED programming card parameter setting (as stated)
• AT series ESC text (from images): dedicated fixed-wing core algorithm program; optimized software structure; original imported components; PCB layout

Programmable Parameters (Tones)

• Brake: Off ("beep" 1 short tone) / On ("beep-beep" 2 short tones)
• Battery type: LiPo ("beep" 1 short tone) / NiMH ("beep-beep" 2 short tones)
• Cutoff mode: Soft-Cut ("beep" 1 short tone) / Cut-Off ("beep-beep" 2 short tones)
• Cutoff threshold: Low ("beep" 1 short tone) / Medium ("beep-beep" 2 short tones) / High ("beep-beep-beep" 3 short tones)
• Start mode: Normal ("beep" 1 short tone) / Soft ("beep-beep" 2 short tones) / Super soft ("beep-beep-beep" 3 short tones)
• Timing: Low ("beep" 1 short tone) / Medium ("beep-beep" 2 short tones) / High ("beep-beep-beep" 3 short tones)

Low-Voltage Protection Details (from manual images)

• Low Voltage Protection Mode (Cut-Off Mode): limit power (Gradually reduce the output power) / Cut-Off (Immediately stop the output power)
• Low Voltage Protection Threshold: Low / Medium / High
• When battery type is set to LiPo, the battery cell number can be judged by ESC automatically
• Low / medium / high cutoff voltage for each LiPo cell: 2.85V / 3.15V / 3.3V
• Example shown: for a 3S LiPo, when “Medium” cutoff threshold is set, cut-off voltage = 3.15*3 = 9.45V
• When battery type is set to NiMH: low / medium / high cutoff voltages are 0% / 50% / 65% of the startup voltage; 0% means the low voltage cut-off function is disabled
• Example shown: for a 6 cells NiMH battery, fully charged voltage is 1.44*6 = 8.64V; when “Medium” cut-off threshold is set, the cut-off voltage = 8.64*50% = 4.32V

Startup Mode & Timing (from manual images)

• Startup Mode: Normal / Soft / Super-Soft
• Motor speed time from stationary to maximum: 300ms / 1.5s / 3s
• Timing: Low / Medium / High (3.75° / 15° / 26.25°)

Protection Functions (from manual images)

• Start up protection: if the motor fails to start up within 2 seconds when pushing the throttle, the ESC will cut-off the output power
• Temperature protection: when the temperature of the ESC is over about 110 Celsius degrees, the ESC will reduce the output power
• Throttle signal loss protection: output power reduces if throttle signal is lost for 1 second; further loss for 2 seconds will cause output to be cut-off completely
• Overload protection: when the load suddenly becomes very large, the power will be cut off or restarted automatically

Specifications

For product selection and setup questions, contact support@rcdrone.top or visit https://rcdrone.top/.

Applications

• Fixed-wing drones / fixed-wing aircraft
• Compatible with helicopter (stated in manual images)

Details

The T-Motor AT40A fixed-wing ESC is labeled for 2–4S LiPo use and includes a 5V 3A BEC for onboard electronics.

T-Motor AT series ESCs are described with a dedicated fixed-wing core algorithm program and an optimized software structure for motor control.

The T-Motor AT40A ESC supports BEC output and is described as using a stable, high‑efficiency BEC module for safe operation.

The T-Motor AT40A ESC is described with high-speed throttle response plus protection features like low-voltage, ESC thermal, and throttle signal loss.

T-Motor AT40A ESC settings can be adjusted by beep tones for brake on/off, LiPo or NiMH battery type, cutoff level, start mode, and timing.

The AT series ESC manual outlines key programmable options such as brake setting, battery type (LiPo/NiMH), and low-voltage protection modes.

The T-Motor AT-40A-UBEC ESC is rated for 40A continuous current with up to 55A burst (≤10s) and includes a 5V/3A switch-mode BEC.

T-Motor AT40A ESC throttle range calibration uses transmitter stick positions and beep tones to confirm high and low throttle endpoints.

The T-Motor AT40A ESC documentation outlines startup, temperature, throttle signal loss, and overload protection plus basic troubleshooting steps.

T-Motor AT40A ESC setup is guided with a beep-code troubleshooting chart and step-by-step transmitter programming instructions.

T-Motor AT40A ESC settings can be adjusted by following the beep-tone menu for brake, battery type, cutoff options, start mode, and timing.