1 / 3Standard checkout available. Verified maker dispatch.
The Favorite LittleBee 30A-S is a BLHeli_S OPTO ESC that the page says is recognised for dependability and strong thrust output. The BLHeli_S firmware delivers a smooth throttle response through hardware-based motor PWM generation.
The page lists a 2-6S LiPo input (6-25.2V), a burst current of 35A, a BLHeli S bootloader, a 4-layer 3 oz copper PCB, 70 mm 20AWG motor wires and a 120 mm signal wire. It has no onboard BEC. The page showed 19 units at Rs 839 (SKU RS7316).
BLHeli_S firmware: hardware-based motor PWM for smooth throttle.
OPTO configuration: no onboard BEC.
2-6S (6-25.2V): the listed battery range.
4-layer PCB with 3 oz copper: as listed.
SILABS EFM8BB21F16 MCU at 48 MHz: as listed.
Oneshot, Oneshot42, Multishot and active braking: 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
Freestyle quads
2-6S builds
BLHeli_S setups
Active braking setups
The MCU is a SILABS EFM8BB21F16 at 48 MHz. The firmware supports Oneshot, Oneshot42, Multishot and active braking.
There is no onboard BEC, so power the receiver and flight controller from elsewhere. The page names a burst rating but uses the 30A figure only in the title.
Item type: brushless ESC
Input supply: 2-6S LiPo (6-25.2V)
Burst current: 35A
Bootloader: BLHeli S
MCU: SILABS EFM8BB21F16 at 48 MHz
PCB: 4-layer, 3 oz copper
Motor wires: 70 mm (20AWG)
Signal wire: 120 mm
BEC: none
1 x Favorite LittleBee 30A-S OPTO ESC electronic speed controller
Racing and freestyle builders who need a 2-6S OPTO ESC.
2-6S LiPo (6-25.2V).
35A.
No.
SILABS EFM8BB21F16 at 48 MHz.
| Brand | Favorite |
|---|---|
| Burst Current | 35.000000 A |
| Continuous Current | 30.000000 A |
| MCU / Processor | SILABS EFM8BB21F16 @ 48MHz |
| Selling unit | PCS |
