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The 40 AMP ESC in yellow is described as a solution for drone enthusiasts and hobbyists, using BLDC technology for flight control in drones and RC applications. It offers a continuous output current of 40A and a user-programmable brake.
The specification table gives a continuous current of 40A, a maximum current of 50A (10+ seconds), a DC input of 3.7V-12.8V, a BEC of 3A/5V, a size of 45 x 26 x 10 mm and a weight of 31 g. The page is inconsistent: the type line says '40A Brushless Without BEC' while the features and table list a 5V BEC, and the features say 2S-3S. At the time of the check the page showed it as sold out (SKU TIFQC0069).
40A continuous, 50A max: max for over 10 seconds.
Programmable brake: and safe power arming program.
Signal-loss motor cut-off: auto cut-off.
Forward and reverse: runs motors both ways.
5V/3A BEC listed: the page lists it in more than one way.
Compact, 31 g: 45 x 26 x 10 mm.
An electronic speed controller (ESC) converts the throttle signal from the flight controller into the three-phase power that a brushless motor needs. It switches battery current through MOSFETs at high speed, so the motor turns at the speed that the pilot or autopilot asks for. The continuous current rating shows how much current the ESC can carry all the time, and the burst rating shows what it can survive for a few seconds.
Match the ESC to the rest of the power system. The battery cell count must fall inside the listed range, the continuous current must be higher than what your motor and propeller draw at full throttle, and the signal protocol (for example PWM, Oneshot, Multishot or DShot) must be supported by your flight controller. An ESC marked OPTO has no built-in BEC, so the receiver and flight controller need power from another source. An ESC with a BEC can supply a regulated voltage, usually 5V, to small electronics.
Install and test carefully. Solder joints must be clean and strong, the motor wires should be kept short and tidy, and the ESC needs airflow because current makes heat. Calibrate the throttle range if the ESC needs it, check the motor direction with the propellers removed, and never connect a battery with the propellers fitted while you are working on the wiring. Use a battery with a cell count and connector that suit the ESC, and check for a heat problem after a short test hover.
Drones
RC aircraft
2S-3S builds
Forward and reverse uses
Hobby projects
The page contradicts itself on whether there is a BEC, so test the output before you power anything from it.
The features name 2S-3S and the table names 3.7V-12.8V, so keep the pack within 3S.
Type: 40A brushless
Continuous current: 40A
Max current: 50A (10+ seconds)
DC input voltage: 3.7V-12.8V
BEC output: 3A / 5V (as listed)
Size: 45 x 26 x 10 mm
Weight: 31 g
Colour: yellow
Max speed: 210,000 RPM (2-pole), 70,000 RPM (6-pole), 35,000 RPM (12-pole)
1 x 40 AMP ESC - Yellow
Hobbyists who need a low-cost 40A ESC and will verify the BEC.
40A continuous and 50A for over 10 s.
2S-3S per the features; 3.7V-12.8V per the table.
The page lists a 5V/3A BEC but also says without BEC.
The page says it runs motors forward or reverse.
| Brand | Generic |
|---|---|
| BEC Output | 5V, 3A |
| Continuous Current | 40.000000 A |
| Input Voltage | 3.7V-12.8V |
| Max Current | 50.000000 A |
| Max Speed | 210000 (2-pole), 70000 (6-pole), 35000 (12-pole) |
| Weight | 31.000000 g |
| Selling unit | PCS |
