Product overview
The HOBBYWING XRotor 20A 4S BLDC is a brushless electronic speed controller intended for integration into 330/450 class multirotors. Its procurement scope is an ESC component rather than a flight platform or airframe kit. Dedicated multirotor control software and motor-specific optimization, with claimed benefits for throttle response and motor compatibility. Those descriptions provide design context. The manufacturer also describes MOSFET switching and a twisted-pair throttle signal cable as measures addressing resistance and signal interference.
Four configurations are listed: International Versions A and B, and Asian Versions A and B, each with its own product number. Published dimensions are 42.0 × 21.6 × 12.0mm for both A versions and 50.0 × 21.6 × 12.0mm for both B versions; listed weights are 18.5g and 15g respectively. All versions list red and black 150mm input leads, three black 75mm output leads, no input connectors, and 3.5mm female gold output connectors.
The current specification table gives every version a 20A continuous and 30A peak current rating, 2-6S LiPo support, and no BEC output. Throttle signals up to 621Hz are stated, with flight-controller compatibility described broadly rather than established for every controller. Throttle range calibration and stick programming are supported, while timing can be adjusted between High and Intermediate and other settings are described as preset. DEO, OneShot mode, light color, and the motor rotation feature are marked unsupported, making these explicit limits relevant when selecting the control configuration.
Specifications
| Specification | Value & conditions |
|---|---|
| Product identity and hardware type | HOBBYWING XRotor 20A 4S BLDC brushless electronic speed controller; a propulsion component. |
| Versions and product numbers |
|
| Continuous / peak current | 20A continuous / 30A peak.Published for all four versions. |
| Battery compatibility | 2-6S LiPo.The current specification table lists this range for all four versions. |
| BEC output | No BEC output.Published for all four versions under BEC Output. |
| Input wires | One red 18AWG wire, 150mm; one black 18AWG wire, 150mm.For all four versions. |
| Output wires | Three black 18AWG wires, 75mm each.For all four versions. |
| Input connectors | None.Published for all four versions; the connector entries follow the input and output wire entries. |
| Output connectors | 3.5mm female gold connectors.For all four versions. |
| Size | International and Asian Version A: 42.0 × 21.6 × 12.0mm; International and Asian Version B: 50.0 × 21.6 × 12.0mm.Dimensions follow the version order: International A, International B, Asian A, Asian B. |
| Weight | International and Asian Version A: 18.5g; International and Asian Version B: 15g.Weights follow the version order: International A, International B, Asian A, Asian B. Included-wire or connector measurement conditions are not stated. |
| Throttle range calibration | Supported.The seven feature statuses follow the published heading order and repeat for all four versions. |
| Stick programming | Supported.The seven feature statuses follow the published heading order and repeat for all four versions. |
| DEO | Not supported.The seven feature statuses follow the published heading order and repeat for all four versions. |
| OneShot mode | Not supported.The seven feature statuses follow the published heading order and repeat for all four versions. |
| Timing | Supported; adjustable between High and Intermediate.Timing is the exception to the manufacturer's preset-settings description. |
| Light color | Not supported.The seven feature statuses follow the published heading order and repeat for all four versions. |
| Motor rotation feature | Not supported.This is the published feature status, not a statement that the connected motor cannot rotate. |
| Applications | 330/450 class multirotors.Published application for all four versions; individual aircraft suitability requires configuration confirmation. |
| Throttle signal frequency | Up to 621Hz; the manufacturer states compatibility with various flight-control systems.Maximum signal frequency. |
| Control software | Dedicated multirotor ESC software, promoted for improved throttle response.Manufacturer description. |
| Motor software optimization | Software optimized for multirotor motors.Manufacturer compatibility claim. |
| Throttle signal cable | Twisted-pair throttle signal cable, described as reducing signal-transmission interference.Manufacturer description; interference reduction and flight effects are not quantified. |
| Power switching architecture | MOSFET power switching, promoted for low internal resistance and high current endurance.Manufacturer description. |
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