Arrma BLX120 Brushless 4S ESC

Arrma BLX120 Brushless 4S ESC

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The BLX120 120A waterproof ESC provides consistent power control and is 4S LiPo ready.


Fitted with super-reliable EC5 connectors and sporting a built-in cooling fan for reduced heat during intense driving action, the BLX120 ESC has over voltage protection, and a two-stage LiPo cut off for added cell management.

The fitted 12AWG high-quality wires and 6V BEC unit are combined with a three mode throttle profile (FWD/REVERSE/BRAKE) to provide the ultimate driving experience.


Battery usage 3S LiPo (11.1V) or 4S LiPo (14.8V)
Low Voltage Cut-Off (LVC) 3.4V per cell
Thermal Protection Temperature 125°C / 257°F
Over-Voltage Protection Over 17.2V
BEC Voltage 6V
BEC Current 3A
ESC Length 43mm / 1.69"
ESC Height 34mm / 1.34"
ESC Width 54.5mm / 2.15" (Including hold-down tabs)
ESC Weight 150g / 5.3 oz
Receiver Wire Length 170mm / 6.70"
Battery Wire Length

225mm / 8.86"

Motor Wire Length (Including Connector) 200mm / 7.87"
Switch Length 21mm / 0.83"
Switch Width 13.3mm / 0.52"
Switch Height 16mm / 0.63"
Motor Bullet Connector Size 4mm / 0.16"
Wire Specifications 12AWG
ESC Battery Connector Type 2xEC5


1 x BLX120 Brushless 4S ESC

1 x Loop Connector