G2 120A ZTW Beatles SBEC ESC 4S-6S ESC Speed Controller For VTOL

Product Overview: ZTW Beatles G2 120A 2-6S SBEC G2

ZTW Beatles G2 120A 4-6S SBEC ESC for UAV, VTOL and Fixed-Wing Aircraft

Flagship Current Rating in the G2 Series

At 120A continuous and 140A burst current, the Beatles G2 120A sits at the top of the entire lineup — built for large-scale fixed-wing UAVs, heavy-lift multicopter arms, and big sport-scale aircraft where lower-current ESCs run out of headroom.

Heavy-Duty 10-Gauge Wiring

Power leads step up to 10-gauge (compared to 12-14 gauge on mid-range models), minimizing resistive losses and heat buildup when running near the ESC's rated current — important for sustained high-load applications like mapping drones, agricultural UAVs, and heavy-lift platforms.

Built for 2-6S Systems

Supporting 2-6S LiPo/LiHV, this ESC gives integrators flexibility to match voltage to their motor and prop combination, whether that's a high-voltage, low-current setup or a lower-voltage, high-current configuration for large fixed-wing platforms.

8A SBEC for Complex Flight Electronics

The adjustable 5V/6V 8A SBEC comfortably powers multiple servos, a flight controller, and auxiliary electronics on larger, more complex aircraft — reducing the need for a separate power distribution board on many builds.

Reverse Thrust for Heavy Aircraft Landings

The SMR function allows reverse-thrust braking below 50% throttle, helping larger, heavier aircraft slow down faster on landing — a meaningful advantage when runway length is limited for bigger airframes.

Robust 98g Construction

At 90×39×13mm and 98g, the housing is sized to dissipate heat effectively under sustained industrial and heavy-lift loads, supporting longer-duration flights than smaller-frame ESCs at this current class.

Full Protection and Field Programming

Startup, over-temperature, low-voltage cutoff, phase-loss, and signal-loss protections are standard, and the ESC can be configured via transmitter stick, the ZTW LCD Program Card G2, or the Bluetooth Module app — giving integrators and OEM customers consistent setup across the fleet.

Ideal for OEM and Bulk Orders

For bulk orders, OEM projects, or technical matching, contact ZTW with your motor type, battery voltage, current requirement, connector preference, aircraft platform, and expected load.

Technical Specifications

FAQ
1. Does this ESC support 2-6S or 4-6S lithium batteries? (Title and specifications are inconsistent)

A: Please refer to the official specifications. This ESC actually supports an input voltage of 4-6S LiPo/LiHV (also compatible with 12-18 NiMH batteries). Although the product title mentions "2-6S," a comparison of the full series parameter table shows that the 120A model is clearly classified as "4-6S" high-voltage input. If you connect 2S or 3S batteries, the ESC may not start properly or may operate unstablely. Please be sure to use a 4S or higher battery pack for power.

2. What are the continuous current and peak current of this ESC?

A: The ZTW Beatles G2 120A has a continuous current of 120A and a peak (instantaneous) current of up to 140A. As the flagship model in the Beatles G2 series, it is designed for large fixed-wing drones, heavy multi-rotors, and large motion models, providing ample power redundancy. Please note that the 140A peak current can typically only be maintained for a few seconds, primarily for rapid acceleration or sudden load increases. For continuous operation, please ensure it is kept below 120A.

3. What is the output capability of the built-in BEC? Can it power high-voltage servos?

A: This ESC has a built-in 8A switching SBEC, with output voltage switching between 5.0V and 6.0V. While it does not support 8.4V high-voltage servo output, the 8A high-current output capability is sufficient to stably drive the flight controller, multiple high-torque servos, and auxiliary electronics. On most large fixed-wing and multi-rotor aircraft, no additional external BEC module is needed to meet power requirements.

4. Does it support "reverse thrust"? How does it work?

A: Yes, it supports SMR (Side Regulator/Thrust) functionality. Its triggering logic is very clear: when the throttle stick is lowered below 50%, the ESC controls the motor to output reverse thrust, achieving a "braking" effect. This feature is extremely valuable for heavy fixed-wing aircraft or vertical takeoff and landing (VTOL) aircraft with long landing runs, significantly shortening the landing distance, offering a clear advantage in scenarios with limited runway length.

5. Does this ESC support firmware upgrades and mobile app programming?

A: It's important to note that according to official specifications, the Beatles G2 120A does not support firmware upgrades (Firmware Upgrade is displayed as Not Supported). However, it still supports flexible parameter programming, which can be done in three ways: ① Remote control throttle stick (Tx); ② Optional ZTW LCD Programming Card G2; ③ Optional Bluetooth module and debugging via mobile app (iOS/Android). Compared to the Skyhawk flagship series, the Beatles G2 series focuses more on high cost-effectiveness and operational stability.

6. What are the physical dimensions and wiring specifications of this ESC? Is it suitable for OEM bulk customization?

A: It measures 90×39×13mm and weighs only 98g, its slim design facilitating integration into tight engine bays. To handle 120A of high current, the power cord has been upgraded to a 10AWG thicker wire diameter (compared to 12-14AWG in mid-to-low-end models), and it comes standard with an Amass XT90 plug, effectively reducing line heat and power loss under high loads. Furthermore, ZTW explicitly supports OEM bulk orders and mass customization. If you have bulk purchasing or technical matching needs, you can contact the manufacturer to provide parameters such as motor type, battery voltage, expected load, and interface preferences for customized configuration.