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Product #: 010-0167-00

Mamba XLX2 Quick Start
Mamba XLX2 Drivers Ed Guide
XLX vs XLX2 Comparison
Audible Alert Reference
Motor Quick Start
Mamba XLX2 Mounting Template
 XLX2 Resource Page    

Introducing the Mamba XLX2, an ESC that will redefine the limits of 1/5th scale R/C! 

Engineered from the ground up, the Mamba XLX2 is packed with a potent combination of hardware and software advancements, sensored performance, CRYO-DRIVE™ and waterproof design that will set a new standard for high performance power systems. The Mamba XL family is well known for its extreme performance capabilities. The XLX2 pays homage to the legacy of its predecessors and exceeds their performance on all levels.

CRYO-DRIVE™, Castle’s proprietary breakthrough technology integrates unique software and dedicated hardware to reduce heat and dramatically increase performance.  Thousands of times per second, the XLX2 software minimizes the amount of time the electrical components spend generating heat. These software advancements work in parallel with an open housing design which enables increased directional airflow to cool critical components. With the combination of a new 50mm fan and forged elliptical fin heatsink, the XLX2 maximizes airflow throughout the system, taking thermal performance to a whole new level. The results are more power handling, cooler ESC temperatures and longer runtimes and for ultra-high performance.

You can easily optimize the ESC for any driving condition, from rugged terrain to smooth pavement to the perils of rock and gravel. Create, save and download setup profiles through the Castle Link Programming Suite on your Windows™ PC, or wirelessly with the convenience of the new B-Link™ Bluetooth™ Adapter and Castle Link app for Android or iOS.

Additional tuning flexibility awaits you with on-the-fly adjustments from your transmitter via the Auxiliary wire. Simply connect the white signal wire to an open radio channel, and enable the feature in Castle Link by selecting what Auxiliary function you would like to use. Access programming parameters such as Torque Control, Max Brake or Max Throttle.  

Sensored 1/5th scale is here! Pairing the Mamba XLX2 with the Castle 4-POLE 12-SLOT SENSORED 2028-800KV or the 2028-1100KV will allow heavy, high speed rigs to experience controllable low-end ranges without sacrificing power, punch or speed.  SmartSense™ mode uses the motor’s sensors to start the motor to provide smooth starts, excellent torque, and low-speed drivability. Once the motor is spinning, it seamlessly transitions to Castle’s ultra-efficient sensorless mode. You’ll put more power to the ground, where it should be, instead of wasting it through raw heat and RPMs.


  • Input Voltage Range 3S-8S LiPo (33.6v max)
  • Sensorless, SmartSense™  and Brushed Running Modes
  • Powerful Integrated 20A Peak Adjustable BEC (5.0V-8.5V)
  • CRYO-DRIVE™ Technology minimizes the amount of time the ESC’s electrical components spend generating heat, resulting in improved thermal performance during partial throttle operation where the majority of driving occurs
  • ESC is housed in a rugged CNC aluminum case and potted in waterproof epoxy to  protect the electronics and promote efficient heat transfer
  • Premium forged heatsink with elliptical fins for superior air flow and increased heat dissipation
  • Oversized factory equipped thermally controlled 50MM cooling fan
  • Compatible with S.BUS2 Telemetry Link and Futaba T4PX, T7PX and T7PXR transmitters
  • Mounting holes located in bottom of aluminum case for affixing to your vehicle
  • Waterproof design for all weather conditions
  • Data logging capability to capture and record performance data from your vehicle
  • Auxiliary wire functionality for "on-the-fly" adjustments using your transmitter
  • Audible alerts for easy diagnosis of common issues such as motor-over-temperature and low-voltage cutoff
  • Convenient transmitter programming for six common adjustable settings including cutoff voltage and drag brake
  • Easily tune and update ESC with USB and Bluetooth™ programming options
  • Castle Link USB programming kit (coupon included with purchase)
  • Optional smartphone-based programming with the B-LINK™ Bluetooth Adapter (sold separately and Castle Link all available on Google Play or Apple App Store)
  • Proudly designed and manufactured in Olathe, KS USA and backed by Castle Creations' 1-year warranty

NOTE: Due to the high power nature of the XLX2, you must use appropriately sized batteries and connectors. We recommend a minimum 150 amp connector for the XLX2; examples include Castle 6.5mm polarized, EC8 and QS8. DO NOT USE XT90, Traxxas, EC5/IC5 or any other connectors rated below 150 amps continuous.


  • Mamba XLX2 ESC
  • 300mm Direct Connect Sensor Wire
  • Mamba Decals
  • Coupon for free Castle Link USB
  • Mamba XLX2 Quick Start Guide
  • Sensor port dust cover
Social Media Content
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(Based on 14 vote(s))
5 review(s) | Write a review
  • USD $269.95 /EA
  • List Price: USD $329.95 /EA
Code Availability Quantity
010-0167-00 This item is in stock. EA
Product Use Statements
  • Individual transmitter signals for neutral, full throttle, and full brake vary. You must calibrate your Castle ESC so that it will operate effectively with your transmitter.
  • Anytime the ESC is powered up with a new transmitter or with different throttle channel settings, it will need to be calibrated to the transmitter’s throttle settings.
  • The ESC may also need to be calibrated after updating to new software via Castle Link.
Input Voltage:
  • Applying voltages higher than 33.6V will cause irreparable damage to your Mamba XLX2 controller.
  • DO NOT RUN HV CELLS (above 4.2v/cell) WHEN RUNNING AT MAX CELL COUNT (8s). This will exceed the 33.6v rating and will damage the ESC and not be covered by the warranty.
Battery Capacity Minimum:

  • The Mamba XLX2 is a high-performance controller; you must use high-discharge cells in your high-performance application to ensure vehicle performance.
  • MINIMUM battery capacity is 5000mAh and MINIMUM of 50C continuous discharge for general use
  • For extreme setups (speed/drag) we recommend a MINIMUM of 70C continuous discharge LiPo batteries.We have tested and recommend these brands for extreme setups: SMC True Spec Extreme V2 150C 6400mah, China Hobby™ CNHL GPLUS 6000mah  (white), Power Hobby Pro Lipo 100C 6000mah and Turnigy Graphene Panther™ 75C
  • If the batteries you are using contain input bullets you might consider upgrading to a direct wired pack as the bullets may not be able to handle the currents that the Mamba XLX2 ESC can push out. 
  • If you must disable low voltage cutoff to prevent the ESC from shutting down then your batteries are insufficient for your application. 3.2v/cell is the lowest a LiPo battery should ever be discharged under load. Utilize the data logging capability of the ESC to verify your batteries are not dropping below the cutoff voltage. Exceeding a LiPo batteries capabilities can lead to a catastrophic failure of the battery and/or ESC.
Wiring and Soldering:
  • High strand count silicone coated copper wire is essential with higher power electric power systems. Castle Creations' wire is lower resistance than the same diameter of solid copper, meaning more power gets from the batteries to the motor with less wasted as heat.
  • The ultra-high strand count and silicone coating means the wire is very flexible which prevents work hardening and breakage with use. 
  • Use a high quality soldering station. Soldering stations usually have a variable temperature control which lets you set the right amount of heat to be used. Too little heat will result in a cold solder joint; too much heat can seriously damage a component. The key factors in quality soldering are time and temperature. Our recommendation for the Mamba XLX2 is a temperature setting of 400° C (745° F). You want it hot and as short a time as possible. We use 250W soldering irons.
  • Use a high quality rosin core solder.  The rosin core solder is infused with flux which helps clean the surfaces you    are soldering for better adhesion.
  • Do not exceed more than 18 inches of total wire between the battery and ESC (this includes the wire already on the ESC and battery).
  • Do not solder wires directly to the circuit board. Doing so will damage the ESC and void the warranty.
  • Our wire is available for purchase and this link provides the appropriate wire gauge for your Castle ESC.
Connector Ratings Minimum:
  • The Mamba XLX2 requires the use of connectors designed for 150+ amps continuous. We have tested and recommend Castle 6.5mm Polarized, Castle 8mm Bullet, QS8 Anti Spark and QS10 Anti Spark
  • Do not use Deans, Traxxas, EC3/XT60, EC5/IC5, XT90/XT90s connectors in a MambaXLX2 setup
  • The Mamba XLX2 is capable of handling incredible amounts of power, your motor must also be up for the task. Always run your motor within the manufacturer’s specs. Monitor motor, battery, and controller temps carefully and never let the motor get above 200° F.
  • Excessive heat in the motor can damage the motor, the Mamba XLX2, and your batteries.
  • It is strongly recommended to not use the “Sensored Only” motor type option. The default “Smart Sense™” modes uses the sensors (if applicable motor is used) to start the motor smoothly. Once the motor is running the ESC stops using the sensors and reverts to sensorless operation. Note: "Sensor Only" has been removed from the ESC and is no longer an option as it served no purpose without the CHEAT mode.
  • Sensorless mode is more efficient resulting in cooler temperatures and potentially higher motor performance. Forcing the ESC to run in sensored mode the entire time will result in reduced performance and higher than normal temperature; this can lead to unnecessary strain on the ESC, motor and batteries.  There is no standard RC application in which sensored only mode is recommended.
  • Always double check that all connections are tight and secure before each use. Motor and battery bullet connectors will loosen up over time from vibrations, g-forces and use. A loose connector will cause increased resistance, this can lead to arcing or stress on the electronics and lead to failure.
  • When you are tuning a car expect some modifications in gearing to get it exactly where you want it.  The goal here is to not overheat the motor.
  • Check your motor temps – never let the motor get above 200° F - invest in an infrared thermometer so you can monitor temps easily.
  • You can also adjust MOTOR TEMPERATURE CUTOFF (with Sensored Motors Only) in Castle Link.  When this setting is enabled, the controller will shut off if the motor reaches the specified temperature as indicated by its internal temperature sensor.
  • We always recommend making small changes when gearing up.
Castle Link Settings:
  • During the optimization of your setup it is critical to check motor and ESC temperatures after making adjustment.
  • The heat limit threshold for Mamba XLX2 ESC is 200° F and Castle motors is 200° F. 
  • We recommend the use of the data log as you progress with the feel and power of the vehicle. You will be able to record real-time data such as motor RPM, battery current and voltage, ESC and motor temperature, throttle input, and more.
  • Download and analyze the collected data via Castle Link and make adjustments to maximize both performance and battery life.
  • Furthermore, we do not recommend using the same Castle Link settings from a previously installed Mamba XLX version. Start from scratch. This is how you learn your car and what it can actually handle. 
AUX Wire:
  • The AUX wire allows you to adjust a setting “on-the-fly” using an auxiliary channel on your receiver.
  • The AUX wire function is disabled by default and is programmable via Castle Link. Plug this wire into the auxiliary (#3/#4) channel on your receiver.
  • You MUST connect the AUX wire to an open channel on your receiver if running more than a single servo. If you have 2 servos, fans, and/or LEDs plugged into the receiver, you MUST connect the AUX wire to the receiver, even if you are not using the Auxiliary function. If only the ESC and a single servo are connected to the receiver, then you do not need to connect the AUX wire to the receiver.
  • You MUST disconnect the AUX wire from your radio before connecting to Castle Link. Failure to do so may result in damage to your Castle Link and/or computer.
Operating Environment
  • Although Mamba XLX2 is waterproof, it is not intended for operation while completely submerged in liquid.
  • Always rinse the ESC and motor with clean water after exposure to corrosives or dirt.
  • While the motor and controller may be waterproof, we suggest users confirm that the rest of their vehicle, including the batteries, servos, radio and chassis are also waterproof before exposing them to liquids of any kind.
  • **The cooling fan must be removed prior to driving in wet conditions. It is not waterproof.

Technical Specs
Application Guidelines:
1:5th Scale vehicles weighing up to 42 lbs.

Vehicle Examples: Losi DB XL-E™, Losi Super Rock Rey™, Arrma Kraton 8s™, Arrma Outcast 8s™, Traxxas X-Maxx™. Note: Some vehicles may require aftermarket parts to allow ESC and/or motor fitment.
Input Voltage Range:
MIN: 3S LiPo, MAX: 8S LiPo 33.6V
Running Modes:
Sensorless, Brushed and SmartSense™ when paired with a Castle 4-POLE 12-SLOT Sensored Motor.
Brake: Proportional
Reversible: Yes, but may be disabled for racing.
On/Off Switch: Yes, waterproof
Cooling Fan: Yes, factory equipped (50mm), fully removable** (See Product Use Statements)
Size: Length: 3.98” (101.2mm),  Width: 2.49” (63.3mm),  Height: 2.2” (55.8mm)
Weight (with wires): 13.1 oz (371g)
Motor Connectors:
8mm female bullets
Items Needed for Operation: The Mamba XLX2 requires the use of connectors designed for 150+ amps continuous, such as Castle 6.5mm polarized or CC BULLET 8.0MM, QS8 8mm Anti Spark or QS10 10mm Anti Spark
Operating environment:
Waterproof design for all weather conditions (See Operating Environment Considerations)
Fully programmable Castle feature set using Castle Link USB adapter (coupon for free link included in package) and freely downloadable Castle Link Windows software, or the Castle Link App and a B-LINK Bluetooth Adapter (sold separately).
Telemetry Link Capable:
Yes, with Castle Creations Telemetry Link for S.BUS2 and Futaba T4PX, T7PX and T7PXR Transmitters.
Tech Tips:
The Mamba XLX2 has threaded mounting holes on the bottom of the ESC. There are four M3 mounting holes with a maximum depth of 5mm; they are spaced 46mm wide and 40.2mm long. Use this template for assistance in alignment and screw hole positioning.

Always double check that all connections are tight and secure before each use. Motor and battery bullet connectors will loosen up over time from vibrations, g-forces and use. A loose connector will cause increased resistance, this can lead to arcing or stress on the electronics and lead to failure.

For support, frequently asked questions, technical documents, and more, visit our support site.

Castle Creations, Inc. warrants this product to be free frommanufacturing defects for a period of one year from date of purchase.

This is a high power product with the potential to be very dangerous.Please read the safety information before use. This product may containchemicals known to the State of California to cause cancer and or birthdefects or other reproductive harm.

U.S. Patent # 7400103, 7492122, 7579796, 7740516, 8287328, 8678875, and 8905814 B2 - Other patents pending.

Controller designed and circuit boards manufactured, in Olathe, Kansas USA.
Controller assembled in Olathe, Kansas USA.


Product Features
  Castle’s newest software technology, CRYO-DRIVE™ minimizes the amount of time the ESC's electrical components spend generating heat by optimally controlling which components are being used while driving the motor. This is happening thousands of times per second, which greatly reduces the rate at which the ESC heats up.  This results in significantly improved thermal performance during partial throttle operation where the majority of driving occurs. Your setup will be able to handle higher gear ratios, in heavier vehicles, with longer runs.

When paired with a Castle 4-POLE 12-SLOT SENSORED MOTOR SmartSense™ software, enabled by default in the Castle Link Programming Suite, will use the motor’s sensors to provide smooth starts, excellent torque, and low-speed drivability.  Once the motor is turning, it seamlessly transitions to Castle’s ULTRA-EFFICIENT sensorless mode with electric timing. Smooth sensored startups and high-efficiency sensorless running makes the Mamba XLX2 system produce more power and less heat. QUIETSENSE™ is an innovative advancement in the design of sensored motors to deliver the highest precision and most efficient startup.

The Mamba XLX2 allows “on-the-fly” adjustments to be made through the AUX wire once enabled in Castle Link. Once you have selected an AUX wire function, that setting can then be tuned from your transmitter while driving. Torque control, max throttle, max brake and drag brake adjustments are a sampling of the available modes. This real-time tuning allows you to quickly and easily fine-tune your system. . Click here for additional information.

Enabled by default, the Mamba XLX2 captures and records performance data from your vehicle. This allows you to view a detailed turn-by-turn record of what your ESC actually experienced during the run. You will be able to record real-time data such as motor RPM, battery current and voltage, ESC and motor temperature, throttle input, and more. Download and analyze the collected data via Castle Link and make adjustments to maximize both performance and battery life.

For over 20 years Castle engineers have been setting the bar for industry leading software functionality. The Castle Link Programming Suite is your ticket to creating the perfect setup. To gain access to the host of tuning parameters, simply redeem the coupon for the Castle Link adapter included with your Mamba XLX2 purchase and download the simple to install software from our website and you are ready to personalize your controller's settings. You can now wirelessly program your ESC with the free Castle Link Mobile App and the purchase the B-Link Bluetooth Adapter. Click here for settings overview for the Mamba XLX2 ESC.

You can now WIRELESSLY PROGRAM settings with the free Castle-Link app available on the Apple App store or Google Play for Android devices and the Castle B-Link™ Bluetooth™ Adapter (sold separately). It is compact and lightweight installed in your vehicle, for anytime programming!

Mamba XLX2 is telemetry ready, which means owners of Futaba T4PX, 7PX  and T7PXR Transmitters will be able to purchase the Castle Creations Telemetry Link for S.BUS2. Real-time data such as ESC temperature, voltages, and RPM can be monitored to ensure performance advantages and spare you the “unknown” parameters that all R/C enthusiasts experience at some point. Telemetry data provides another level of protection and can increase performance.

The MAMBA XLX2 is housed in a rugged CNC-machined aluminum case and then potted in waterproof epoxy. This not only protects the electronics but ensures any heat generated in the controller can easily be dissipated through the case.

Mamba XLX2 features Audible Alerts that will notify you via audible chimes of possible issues with calibrations and error conditions to help diagnose problems .

The Mamba XLX2 is proudly designed and manufactured in Olathe, Kansas USA and is backed by Castle Creations’ 1-year warranty and unparalleled "make-it-right" customer support. Call us, email us, or walk in our front door – we’re here to help. Click here for additional information about our Tier 1 and Tier II warranty.

Optional Accessories
B-Link Bluetooth Adapter supports iOS and Android App
Telemetry Link S.BUS
Castle Link Quick Connect (or Quick Connect Duo)
6.5mm Polarized Connectors-Male/Female Single Pk
6.5mm Polarized Connectors-Male Multi-Pack
Polarized Castle Connectors - 6.5mm Female Multi-Pack

6.5mm Male/Female Connector Set (3ea)

8.0mm Male/Female Connector Set (3ea)
Motor Cooling Fan, 20XX Series, V2 (Coming Soon!)

Castle Capacitor Pack, 8S MAX (35V)

Service Parts
WIRE, 36", 08 AWG, BLACK                                  
WIRE, 36", 08 AWG, RED
WIRE, 36", 08 AWG, WHITE

Average rating:
(Based on 14 vote(s))
Rate this product:
SpudskiRC From United Kingdom
The best ESC about
July 14, 2023
I have 7 of these now and use them in all my speed run cars, in my opinion can’t be beaten for the power they produce and the price. They can cope with a large amp load, have data logging so you can fine tune your setup and several programmable features. They’re a lot more user friendly than the more expensive competitors such as MGM. Can be used by a novice to a pro, definitely recommended!
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Shawn J From United States
Still one of the most powerful and smoothest escs out to date!
July 14, 2023
I've ran these in 6 of my Cars now all 5th scale. Losi dbxle 2.0 , losi 5iveB, mcd and this esc is the one you want if you want to push the limits and keep the weight down. Not only are they buttery smooth for in air control when bashing but launching the car is excellent as well with Zero Coggin due to the sensored mode. I would still choose the xlx2 over recently released esc based of the shear power and performance you cam get out of it. There really is NO other esc in the same category with the same power to weight ratio you get from an XLX2 .
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Notorious J From Canada
Taking the Limitless to new top speeds
July 14, 2023
Ran an MMX8S before and loved it, but new that the crazy amps drawn from 8s would need more power. The XLX2 runs so cool and effortlessly during repeated high speed runs. Being able to customize the settings through castle link and displaying the run logs is so key to achieving new personal bests.
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Jacob From Michigan
Insane power!
July 14, 2023
The XLX2 is the ultimate esc for electric RC cars! I have an XLX2 with a 2028 1100kv motor in my XMaxx and it's turning 1:1 gearing on 8s without breaking a sweat! The customisability is unparalleled. Highly recommend to anyone looking for the best of the best!
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SIX & 12 RC GUY From United States California
November 4, 2020
5 of 5 people found this review helpful
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