120A ESC ZTW Shark G2 4S-6S Large RC Boats 120A Speed Controller
The ZTW Shark G2 120A is the 32-bit series flagship, delivering 120A continuous and 140A burst on 4-6S LiPo. With splash-proof glued design, flat water cooling, 5V/6V 8A SBEC, synchronous rectification, forward/reverse modes, and separate control/power boards for large RC boats.
ZTW Shark G2 120A 32-Bit Waterproof ESC 4-6S with Water Cooling and 8A SBEC for Large RC Boats and Heavy Light Underwater Thrusters
32-Bit Flagship 4-6S Boat ESC
The Shark G2 120A is the most powerful model in the Shark G2 series, pairing a 32-bit microprocessor with 120A continuous output for large RC boats, high-performance catamarans, and heavy lightweight underwater thruster systems.
120A Continuous / 140A Burst on 4-6S
New-generation MOSFETs deliver low heat and withstand extreme instant current surges with high reliability. 120A sustained and 140A peak on 4-6S LiPo provides maximum power for the largest 6S-compatible boat motors and heavy subsea thrusters.
Splash-Proof + Flat Water Cooling
Waterproof-glued construction handles heavy spray and humidity, while the 32mm flat water-cooling system efficiently manages the thermal load of sustained 120A operation — essential for large boats and high-power underwater propulsion.
8A High-Power Adjustable SBEC
The 5.0/6.0V switching BEC supplies 8A continuous (15A burst), powering multiple high-torque servos, pumps, lights, and auxiliary electronics — eliminating the need for an external UBEC even on complex large-boat setups.
Synchronous Rectification for Maximum Efficiency
Synchronous rectification significantly reduces ESC heating at extreme currents, improving driving efficiency and conserving battery energy — critical for large boats and heavy thrusters where every watt matters.
Forward/Reverse & Isolated Board Architecture
"Forward Only" for racing performance, "Forward and Backward" for scale operation and docking. The separate control-board/power-board design enhances anti-interference and reliability by thermally isolating the control circuit from the high-power stage.
Protection & Programming
Five-layer protection: start-up, over-heat, LVC, phase loss, signal loss. Configure via transmitter, LCD Program Card G2, or optional Phone App (adapter required). 10-gauge power wires. At 89×45×13mm and 105g, it remains remarkably compact for a 120A 6S ESC.
Technical Specifications
| Specifications | Shark 20A SBEC G2 | Shark 30A SBEC G2 | Shark 40A SBEC G2 | Shark 50A SBEC G2 | Shark 60A SBEC G2 | Shark 80A SBEC G2 | Shark 100A SBEC G2 | Shark 120A SBEC G2 |
|---|---|---|---|---|---|---|---|---|
| Continuous Current | 20A | 30A | 40A | 50A | 60A | 80A | 100A | 120A |
| Burst Current | 30A | 40A | 55A | 65A | 80A | 100A | 120A | 140A |
| Input Voltage | 2-4S LiPo | 2-4S LiPo | 2-4S LiPo | 2-4S LiPo | 2-6S LiPo | 4-6S LiPo | 4-6S LiPo | 4-6S LiPo |
| BEC Output | 5.0/6.0V Adj. / 4A | 5.0/6.0V Adj. / 4A | 5.0/6.0V Adj. / 4A | 5.0/6.0V Adj. / 4A | 5.0/6.0V Adj. / 8A | 5.0/6.0V Adj. / 8A | 5.0/6.0V Adj. / 8A | 5.0/6.0V Adj. / 8A |
| Water Cooling | Yes (27mm Tube) | Yes (27mm Tube) | Yes (27mm Tube) | Yes (27mm Tube) | Yes (27mm Tube) | Yes (32mm Tube) | Yes (32mm Tube) | Yes (32mm Tube) |
| Programming | Tx / LCD Card G2 | Tx / LCD Card G2 | Tx / LCD Card G2 | Tx / LCD Card G2 | Tx / LCD Card G2 | Tx / LCD Card G2 | Tx / LCD Card G2 | Tx / LCD Card G2 |
| Firmware Upgrade | Not Supported | Not Supported | Not Supported | Not Supported | Not Supported | Not Supported | Not Supported | Not Supported |
| Power Wire | 18AWG | 16AWG | 14AWG | 14AWG | 14AWG | 12AWG | 10AWG | 10AWG |
| Motor Wire | 18AWG | 16AWG | 14AWG | 14AWG | 14AWG | 12AWG | 12AWG | 12AWG |
| Battery Plug | XT60 | XT60 | XT60 | XT60 | XT60 | XT90 | XT90 | XT90 |
| Motor Bullet | 3.5mm Gold | 3.5mm Gold | 3.5mm Gold | 3.5mm Gold | 3.5mm Gold | 4.0mm Gold | 4.0mm Gold | 4.0mm Gold |
| Size (L×W×H) | 60×33×10mm | 60×33×10mm | 69×33×9mm | 69×33×9mm | 70×41×12mm | 89×45×13mm | 89×45×13mm | 89×45×13mm |
| Weight | 32g | 36g | 45g | 45g | 65g | 98g | 105g | 105g |
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