XRotor PRO 40A Opto ESC Dual Pack (COB Short Leads)
by HobbyWing

The Hobbywing XRotor PRO 40A Opto ESC Dual Pack (COB Short Leads) is a professional-grade electronic speed controller solution engineered for heavy-lift multirotors, commercial sUAS platforms, and tactical multi-rotor aircraft in 500-class to 650-class configurations. Sold as a factory-matched pair, these 40-Amp ESCs feature Hobbywing's Component-On-Board (COB) architecture with direct-solder motor pads and short lead leads, allowing custom drone builders to streamline wiring, reduce dead weight, and mount the controllers neatly inside 25mm carbon fiber arm tubes.

At the core of the XRotor PRO series is Hobbywing’s proprietary Driving Efficiency Optimization (DEO) technology (also known as active braking). DEO significantly improves throttle linearity, motor driving efficiency, and flight stability by automatically braking and rapidly dampening motor speeds when reducing throttle. Pre-configured specifically for disc-type brushless outrunner motors, the ESC utilizes extra-low internal resistance MOSFETs and high-performance drive chips capable of managing continuous 40A loads and 60A peak bursts on 3S to 6S LiPo power. The OPTO design (no built-in BEC) insulates the flight controller from electrical noise, while the twisted-pair throttle signal cable eliminates signal crosstalk at high refresh rates up to 621Hz. This makes the XRotor PRO 40A Dual Pack an ideal power management asset for FPV aerial photography rigs, STEM university robotics programs, and commercial defense reconnaissance platforms.

Technical Specifications

• Brand: Hobbywing

• Model Series: XRotor PRO 40A OPTO (COB / Short Lead Edition)

• Quantity: Dual Pack (2 ESCs Included)

• Continuous Current: 40A

• Peak Current (10 Seconds): 60A

• Input Voltage Range: 3S – 6S LiPo (11.1V – 22.2V)

• BEC Output: None (OPTO / Optically Isolated)

• Motor Wiring Configuration: COB (Component On Board / Direct Solder Motor Pads / Short Leads)

• Core Technology: Driving Efficiency Optimization (DEO) / Active Regenerative Braking

• Throttle Signal Frequency: Up to 621Hz (Compatible with standard flight controllers)

• Signal Cable Type: Twisted-pair wire for interference and crosstalk reduction

• Physical Dimensions: 73.5 mm x 21.8 mm x 11 mm (per ESC)

• Unit Weight: ~45 grams (per ESC)

• Target Airframe Size: 500 / 550 / 650 Class Quadcopters, Hexacopters, and Octocopters

What Is Included

• (2) Hobbywing XRotor PRO 40A OPTO ESCs (COB Short Lead Configuration)

• (1) User Manual and Technical Reference Sheet