Tekin’s RX4 Brushless Sensored ESC is designed to power your chassis past any obstacle. With massive power handling capabilities, a waterproof* design and all the customization features you’d expect from a Tekin ESC; the RX4 has you covered no matter the situation. Not only reliable, this ESC has a host of built in features like a High Voltage BEC, Drag Brake, Data Logging, Voltage Cutoffs for LiPos, HotWire 3.0 Bluetooth Connectivity and the ability to run either Brushed or Brushless motors. The RX4 defines versatility.


The RX4 Housing is a thick-walled, reinforced Hardbox design able to withstand the elements and rough environments that come with true Offroad adventuring.


Rocks, Dirt, Snow, Sand, Mud, Trail and Track; the RX4 is no-limits RC fun.



Recommended Applications



1.9 & 2.2 Trail Adventure

1.9 & 2.2 Rock Race

Controls: Forward/Brake/Reverse

Input Voltage: 2S-6S LiPo

Motor Limit Brushless Mode: 2S -  5700kV 4-pole

                                              3S -  3500kV 4-pole

                                              4S -  2300kV 4-pole
                                              5S - 1800kV 4-pole
                                              6S - 1200kV 4-pole

Motor Limit Brushed Mode: No Limit

Max Current: 240amps per phase*


BEC: 6.0v / 7.4v @ 8amps

Dimensions:  1.6 x 2.0 x 1.4" / 40.6 x 50.8 x 35.5mm

Weight: 2.65oz / 75.5g


*per manufacturer specs

HardBox Waterproof Design *

Multi-Fin High Efficiency Heat Sink and Optional High RPM Cooling Fan

QuickTune™ One Touch Programming

Adjustable Torque Control ***

Adjustable Throttle and Brake Frequencies ***
HD High Voltage Programmable BEC ***
HotWire™ Programming Port ***
Data Logging Capability ***
Sensor Checker

One-Touch Radio Calibration
On-Board Temperature Indicator

ESC Self Diagnostics with Error Codes
Fully Proportional Forward/Brake/Reverse

D2: Dual Drive Mode Technology

Brushless and Brushed Motor Drive

Sensored or Sensorless Operation

LiPo Safe with Custom Voltage Cutoffs

Sensor Plug for Precise Commutation

HDAC: High Density Copper PCB's
Ultra-smooth and Precise Throttle and Braking Control


* Waterproof in sensorless operation only. Element Proof ESCs and Motors are specially designed to withstand water splashes and are not meant to be submerged. Included dielectric grease must be used on the sensor connections to protect them from shorting.


**The RX4 is not intended for operation while submerged in liquid.

*** requires HotWire™ sold separately.


DB - Drag Brake (13 steps)

BS - Brake Strength (13 steps)

LM - Torque Limiter (7 steps)

NW - Neutral Width (13 steps)

TP - Timing Profiles 5 Preset - 2 Custom*

MT - Motor Type

Brushless Modes - FWD Only / FWD-REV / FWD-REV Delay / FWD-REV Delay REV Motor Direction

Brushed Modes - FWD Only / FWD-REV / FWD-REV Delay

VC - Voltage Cutoff : 2S, 3S, 4S, 5S, 6S, Custom*

* requires HotWire™ sold separately.



Update ESC Firmware

Create, Save, Load and Share Custom ESC Profiles
Drag Brake (0-100 steps) <<video>>

Brake Strength (0-100 steps) <<video>>
Brake Minimum (0-30 steps) <<video>>

Active Braking (0-6 steps) <<video>>

Brake Frequency (750hz - 12kHz) <<video>>
Throttle Minimum (0-30 steps) <<video>>

Throttle Frequency (2kHz - 12kHz) <<video>>

Torque Limiter (0-10 steps) <<video>>
Reverse Speed (0-100 steps)

Reverse Delay (0-2seconds)

Neutral Width (0-100 steps) <<video>>
Push Control (0-100 steps) <<video>>

Timing Profiles 5 Preset - 2 Custom <<video>>
Dual Drive Mode

Motor Type <<video>>

Brushless Modes - FWD Only / FWD-REV / FWD-REV Delay / FWD-REV Delay REV Motor Direction

Brushed Modes - FWD Only / FWD-REV / FWD-REV Delay

Voltage Cutoff - 2S, 3S, Custom Per Cell <<video>>
Fan ON/AUTO Modes



TT2000 - RX4 ESC



TT1451 - HotWire 2.0
TT1452 - HotWire 3.0 BLE





TT3842 - RX4 Case Top



TT3806 - Tekin Power Switch

TT3808 - Receiver Plug 250mm

TT3809 - Sensor Cable 150mm

TT3810 - Sensor Cable 200mm

TT3811 - Sensor Cable 100mm

TT3813 - Sensor Cable 275mm

TT3825 - GEN2 HotWire Adaptor




TT3833 - RX4/RSX Fan Pack (2)


Tekin FlexWire

Tekin Power Connectors

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