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HYDRA COBRA 6, 33.6V ESC, 8A PEAK BEC
Product #: 010-0189-00
32-bit precision for the waves.
Building on the success of the HYDRA COBRA 5, we are excited to announce the release of the all-new HYDRA COBRA 6, the ultimate enhancement that propels high-performance monohulls, up to 36 inches in length, to new heights.
This marine-focused ESC features a custom water-cooled heatsink for efficient thermal management and an aluminum top plate with dual anodized water fittings (.17" OD, 10-32 UNF threads). The ESC is housed in a rugged CNC aluminum case and potted in waterproof epoxy to protect the electronics and includes an upgraded current-sensing and thermal protection system actively mitigates the risk of failure in aggressive or high-load setups.
Access to tuning options, data logs, and firmware updates for the COBRA SERIES ESCs is available at no charge using the Castle Link V4 USB adapter included in the box and Castle Link 2 software, available for download on the Castle Creations website.
The HYDRA COBRA 6 is packed with a potent combination of hardware and software advancements, making it an indispensable ally in high-performance power systems. Users will benefit from the same footprint as its predecessor, the Hydra X 8S, while an upgraded current-sensing and thermal protection system actively mitigates the risk of failure in aggressive or high-load setups.
NOTE: Due to the high-power nature of the Hydra Cobra 6, you must use appropriately sized batteries and connectors. We recommend a minimum 130-amp connector for the Hydra Cobra 6; examples include Castle 6.5mm polarized, EC8 and QS8. DO NOT USE XT90, Traxxas, EC5/IC5 or any other connectors rated below 130 amps continuous.
HYDRA COBRA 6 NEW FEATURES:
- 32-Bit processing power for smoother motor control and improved response time.
- Enhanced Data Logging includes:
- Double the maximum sample frequency of older generations.
- 8x increased logging time of older generations.
- ESC electrical motor timing data.
- Acceleration data via onboard accelerometer.
- Looping feature prevents interruptions in data log recording.
- Additional tuning features include:
- Improved braking adjustability
- Separate brake and reverse curves
- Highly adjustable internal BEC (5.0V - 8.5V adjustable in 0.1V increments)
- Access to tuning options and firmware updates for free with Castle Link V4 USB programmer included with purchase.
- Optional smartphone-based programming with the B-LINK™ 2 Bluetooth Interface(sold separately) and free Castle Link 2 app available on Google Play or Apple App Store.
- Upgraded current-sensing and thermal protection system actively mitigates the risk of failure in aggressive or high-load setups.
PURCHASE INCLUDES:
- Hydra Cobra 6 ESC
- Cobra decals
- Castle Link V4 USB Adapter
- Hydra Cobra Quick Start Guide
- Waterproof : Yes
- Telemetry Capable : No
- Data Logging : Yes
- Auxiliary Wire : Yes
- Minimum Input Voltage : 2S
- Maximum Input Voltage : 8S
- Sensored Capable : Yes
- Recon G6 Certified ESC : No
- ROAR Certified ESC : No
- CRYO-DRIVE : Yes
- B-Link Compatible : Yes
| Product Features | |
| CRYO-DRIVE™ TECHNOLOGY | 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. |
| SMARTSENSE™ | 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 Hydra ESC 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. |
| AUX WIRE FUNCTIONALITY | The Hydra 6 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. |
| DATA LOGGING | Enabled by default, the Hydra 6 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. |
| CASTLE LINK | For over 25 years Castle engineers have set 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 download the simple to install software from our website and you are ready to personalize your controller's settings. |
| B-LINK BLUETOOTH | 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 B-Link 2 Bluetooth Interface (sold separately). It is compact and lightweight installed in your vehicle, for anytime programming! |
| WATERPROOF | 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. |
| AUDIBLE ALERTS | Hydra Cobra 6 features Audible Alerts that will notify you via audible chimes of possible issues with calibrations and error conditions to help diagnose problems . |
| WARRANTY | The Hydra Cobra 6 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. |
| Product Use Statements | |
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| Calibration: |
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| Input Voltage: |
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| Battery Capacity Minimum: |
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| Wiring and Soldering: |
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| Connector Ratings Minimum: |
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| Motors: |
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| Prop size: |
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| Castle Link Settings: |
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| AUX Wire: |
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| Operating Environment Considerations: |
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| Technical Specs | |
|---|---|
| Application Guidelines: | RC Hobby boats up to 36" (Ideal for Proboat Impulse 32", Proboat Sonicwake 36", Traxxas Spartan, Traxxas M41 Caamaran) |
| Input Voltage Range: | MIN: 2S LiPo, MAX: 8S LiPo 33.6V |
| Running Modes: | Sensorless, Brushed and SmartSense™ when paired with a Castle 4-Pole Sensored Motor. |
| Brake: | Available but disabled by default. |
| Reversible: | Available but disabled by default. |
| On/Off Switch: | Yes, waterproof |
| Water cooling fittings | Two .17" fittings included. Uses 10-32 UNF threads. |
| Size: | Length: 69.5mm / Width: 54.1mm / Height: 24.7mm |
| Weight (with wires): | 155.5 grams / 5.49 oz / .34 lbs |
| Continuous current rating*: (SEE NOTE BELOW) | 140A |
| Burst current rating*: (SEE NOTE BELOW) | 280A |
| Motor Connectors: | 6.5mm female bullets on circuit board, matching 6.5mm male bullets for motor required (not included) |
| Items Needed for Operation: | The Hydra Cobra 6 requires the use of connectors designed for 130 amps continuous, such as Castle 6.5mm polarized or CC BULLET 8.0MM, QS8 8mm Anti Spark or QS10 10mm Anti Spark. You will also need 6.5mm male bullets for the motor connections. |
| Operating environment: | All weather conditions (See Operating Environment Considerations) |
| Programmability: | Access to tuning options and firmware updates for free with Castle Link V4 USB adapter included with purchase. Now with USB-C connector! (Requires Windows 10 or higher) |
| Tech Tips: | If replacing the water-cooling fittings, it is recommended to use Loctite® 545 (or similar) on the threads. This will ensure a watertight, 25+ PSI strong seal. |
For support, frequently asked questions, technical documents, and more, visit our support site.This is a high-power product with the potential to be very dangerous. Please read the safety information before use. This product may contain chemicals known to the State of California to cause cancer and or birth defects or other reproductive harm.
Controller designed and circuit boards manufactured, in Olathe, Kansas USA.
Controller assembled in Olathe, Kansas USA.

| Resources | |||
|---|---|---|---|
| Hydra 6 Quick Start Guide | Cobra Series User Manual | Hydra 6 Product Use Statements | |
| Optional Accessories | |
|---|---|
| 010-0079-00 | Castle Link Quick Connect (or Quick Connect Duo) |
| 011-0053-00 | 6.5mm Polarized Connectors-Male/Female Single Pk |
| 011-0068-00 | 6.5mm Polarized Connectors-Male Multi-Pack |
| 011-0069-00 | Polarized Castle Connectors - 6.5mm Female Multi-Pack |
| CC BULLET 6.5MM | 6.5mm Male/Female Connector Set (3ea) |
| CC BULLET 8.0MM | 8.0mm Male/Female Connector Set (3ea) |
| 011-0148-00 | Castle Capacitor Pack, 8S MAX (35V) |
| Service Parts | |
|---|---|
| 011-0027-00 | WIRE, 36", 08 AWG, BLACK |
| 011-0028-00 | WIRE, 36", 08 AWG, RED |
| 011-0029-00 | WIRE, 36", 08 AWG, WHITE |
| 011-0147-00 | DIRECT CONNECT SENSOR WIRE 300MM |