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The EMAX Simon Series 20A is a drone speed controller with SimonK firmware for smooth throttle response. The page says it supports 2-4S LiPo batteries and has a lightweight, compact design suited to FPV drones and RC aircraft.
It uses American-made (IR) MOSFETs for consistent current and long-term durability, and a durable PCB built with thick, high-grade copper printed as 5 oz. The page shows a current rating of 20A. It showed only 10 left in stock at Rs 856 (SKU TIFQC0153).
SimonK firmware: improves throttle response and stability.
American-made (IR) MOSFETs: consistent current and durability.
Thick 5 oz copper PCB: as printed.
2-4S LiPo: flexible power sources.
20A current rating: as listed.
Compact and lightweight: for drone enthusiasts.
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 drones
RC aircraft
2-4S builds
SimonK setups
Small multirotors
The page gives no burst rating, BEC or dimensions, so check them before you buy.
The firmware is SimonK compatible.
Current rating: 20A
Firmware: SimonK compatible
Model series: Simon Series
Battery: 2-4S LiPo
MOSFETs: IR (American-made)
PCB: thick 5 oz copper (as printed)
1 x EMAX Simon Series 20A 2-4S LiPo brushless ESC
FPV builders who want a SimonK 20A ESC.
20A.
2-4S LiPo.
SimonK.
American-made (IR) MOSFETs.
| Brand | EMAX |
|---|---|
| Battery Compatibility | 2-4S LiPo |
| Firmware | SimonK |
| Selling unit | PCS |
