Sold out · Ask us about restocking
Not available to order right now.
The EMAX Nano Series 20A is a high-performance ESC for racing drones with BLHeli firmware and OneShot125 compatibility for fast throttle response. The page describes an opto design with a twisted pair wire for noise resistance.
The specifications give 20A continuous current, 25A burst for 10 seconds, a peak of up to 40A, a 3-4S LiPo supply, no built-in BEC and programmability. It works with Skyline32, Naze32, Pixhawk and CC3D flight controllers. It has active braking, and low-voltage cut-off and overheat protection. The page showed only 2 left at Rs 1,073 (SKU TIFQC0155).
20A continuous, 25A burst (10 s): with a peak up to 40A.
BLHeli and OneShot125: fast throttle response.
OPTO design: no built-in BEC.
Twisted pair wire: for noise resistance.
Active braking: damped light.
Programmable: BLHeli and SimonK firmware supported.
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.
FPV racing
3-4S quads
Skyline32, Naze32, Pixhawk and CC3D builds
Active braking setups
BLHeli setups
The ESC has no BEC, so power the receiver and flight controller elsewhere. It supports BLHeli and SimonK firmware.
The page lists the supported flight controllers as Skyline32, Naze32, Pixhawk and CC3D.
Brand: EMAX
Continuous current: 20A
Burst current (10 s): 25A
Peak current: up to 40A
Power supply: 3-4S LiPo
BEC: none
Programmable: yes
Firmware: BLHeli / SimonK supported
1 x EMAX Nano Series 20A BLHeli Oneshot125 3-4S ESC
Racing builders who need a light OPTO 20A ESC on 3-4S.
20A continuous, 25A burst for 10 s, up to 40A peak.
3-4S LiPo.
No.
OneShot125.
| Brand | EMAX |
|---|---|
| Battery Support | 3S-4S |
| Burst Current | 25.000000 A |
| Continuous Current | 20.000000 A |
| Firmware | BLHeli OneShot125 |
| Peak Current | 40.000000 A |
| Selling unit | PCS |
