{"product_id":"hobbywing-xrotor-pro-40a-esc-dual-pack","title":"Hobbywing XRotor PRO 40A ESC Dual Pack – 3–6S Multirotor Brushless ESC for Drone","description":"\u003cp\u003eThe \u003cstrong\u003eHobbywing XRotor PRO 40A ESC Dual Pack\u003c\/strong\u003e is a purpose-built 3–6S brushless ESC solution for multirotors, including 550\/650-class quadcopter applications. Each package contains \u003cstrong\u003etwo XRotor PRO 40A ESCs\u003c\/strong\u003e, with each ESC rated for 40A continuous current and 60A peak current.\u003c\/p\u003e\n\n\u003cp\u003eTwo versions are available. \u003cstrong\u003eVersion A (SKU 30902042)\u003c\/strong\u003e uses conventional motor output wires, while \u003cstrong\u003eVersion B \/ COB (SKU 30902041)\u003c\/strong\u003e uses gold-plated motor connectors mounted directly to the ESC circuit board. Both versions feature Hobbywing's DEO driving-efficiency technology, rapid throttle response, automatic timing adjustment and a dedicated multirotor control program.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#f7f7f7;padding:12px 15px;margin:18px 0;border-left:4px solid #E60073;font-size:14px;line-height:1.7;\"\u003e\n\u003cp style=\"margin:0 0 6px;\"\u003e\u003cstrong\u003eQuick Fit Check\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage:\u003c\/strong\u003e 2 × XRotor PRO 40A ESCs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery:\u003c\/strong\u003e 3–6S LiPo\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent:\u003c\/strong\u003e 40A continuous \/ 60A peak (10 seconds)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBEC:\u003c\/strong\u003e No built-in BEC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Multirotors \/ 550–650 class quadcopters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersion A:\u003c\/strong\u003e Motor output wires\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersion B \/ COB:\u003c\/strong\u003e Motor connectors mounted directly on the ESC PCB\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size:18px;font-weight:700;margin:24px 0 10px;color:#000;border-bottom:1px solid #eee;padding-bottom:6px;\"\u003eHobbywing XRotor PRO 40A Specifications\u003c\/h2\u003e\n\n\u003cdiv style=\"overflow-x:auto;margin:14px 0 20px;\"\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;line-height:1.55;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;font-weight:700;padding:10px;border:1px solid #ddd;width:34%;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px;border:1px solid #ddd;\"\u003eXRotor PRO 40A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;font-weight:700;padding:10px;border:1px solid #ddd;\"\u003ePackage Quantity\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px;border:1px solid #ddd;\"\u003e\u003cstrong\u003e2 ESCs per pack\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;font-weight:700;padding:10px;border:1px solid #ddd;\"\u003eContinuous Current\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px;border:1px solid #ddd;\"\u003e40A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;font-weight:700;padding:10px;border:1px solid #ddd;\"\u003ePeak Current\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px;border:1px solid #ddd;\"\u003e60A \/ 10 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;font-weight:700;padding:10px;border:1px solid #ddd;\"\u003eBattery Input\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px;border:1px solid #ddd;\"\u003e3–6S LiPo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;font-weight:700;padding:10px;border:1px solid #ddd;\"\u003eBEC\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px;border:1px solid #ddd;\"\u003eNo built-in BEC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;font-weight:700;padding:10px;border:1px solid #ddd;\"\u003eProgrammable Item\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px;border:1px solid #ddd;\"\u003eDEO – ON \/ OFF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;font-weight:700;padding:10px;border:1px solid #ddd;\"\u003eThrottle Signal Frequency\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px;border:1px solid #ddd;\"\u003eUp to 621Hz*\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;font-weight:700;padding:10px;border:1px solid #ddd;\"\u003eRecommended Application\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px;border:1px solid #ddd;\"\u003eMultirotors \/ 550–650 class quadcopters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;font-weight:700;padding:10px;border:1px solid #ddd;\"\u003eVersion A Size\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px;border:1px solid #ddd;\"\u003e66 × 21.8 × 11mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;font-weight:700;padding:10px;border:1px solid #ddd;\"\u003eVersion A Weight\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px;border:1px solid #ddd;\"\u003eApprox. 50g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;font-weight:700;padding:10px;border:1px solid #ddd;\"\u003eVersion B \/ COB Size\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px;border:1px solid #ddd;\"\u003e73.5 × 21.8 × 11mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;font-weight:700;padding:10px;border:1px solid #ddd;\"\u003eVersion B \/ COB Weight\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px;border:1px solid #ddd;\"\u003eApprox. 45g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;font-weight:700;padding:10px;border:1px solid #ddd;\"\u003eStock Number\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px;border:1px solid #ddd;\"\u003e30902042 – Version A\u003cbr\u003e30902041 – Version B \/ COB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cp style=\"font-size:13px;color:#666;margin:8px 0 18px;\"\u003e*Hobbywing specifies throttle signal support up to 621Hz and notes that throttle signals above 500Hz are non-standard signals.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:18px;font-weight:700;margin:24px 0 10px;color:#000;border-bottom:1px solid #eee;padding-bottom:6px;\"\u003eVersion A vs Version B (COB)\u003c\/h2\u003e\n\n\u003cp\u003eThe two XRotor PRO 40A versions share the same basic electrical rating and 3–6S multirotor application, but use different motor-connection layouts.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;margin:14px 0 20px;\"\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;line-height:1.55;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"background:#E60073;color:#fff;padding:10px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"background:#E60073;color:#fff;padding:10px;border:1px solid #ddd;text-align:left;\"\u003eVersion A – 30902042\u003c\/th\u003e\n\u003cth style=\"background:#E60073;color:#fff;padding:10px;border:1px solid #ddd;text-align:left;\"\u003eVersion B \/ COB – 30902041\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eESCs per Pack\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;background:#f2f2f2;\"\u003e2\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;background:#f2f2f2;\"\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eMotor Connection\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;background:#f2f2f2;\"\u003eWire leaded\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;background:#f2f2f2;\"\u003eConnector On Board (COB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eMotor Output Wires\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;background:#f2f2f2;\"\u003eYes\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;background:#f2f2f2;\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eContinuous \/ Peak\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;background:#f2f2f2;\"\u003e40A \/ 60A\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;background:#f2f2f2;\"\u003e40A \/ 60A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eLiPo\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;background:#f2f2f2;\"\u003e3–6S\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;background:#f2f2f2;\"\u003e3–6S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;background:#f2f2f2;\"\u003e66 × 21.8 × 11mm\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;background:#f2f2f2;\"\u003e73.5 × 21.8 × 11mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;font-weight:700;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;background:#f2f2f2;\"\u003eApprox. 50g\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;background:#f2f2f2;\"\u003eApprox. 45g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cp\u003e\u003cstrong\u003eVersion A\u003c\/strong\u003e is the conventional wire-leaded configuration. It provides motor output wires from the ESC, making it suitable for installations where the wiring layout needs more flexibility.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eVersion B (COB – Connector On Board)\u003c\/strong\u003e removes the motor output leads and instead uses gold-plated connectors mounted directly on the ESC circuit board. This creates a different installation layout and can reduce unnecessary motor-side wiring where the airframe and motor arrangement suit the COB configuration.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#fff7fb;padding:12px 15px;margin:18px 0;border-left:4px solid #E60073;font-size:14px;line-height:1.7;\"\u003e\n\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Version A and Version B are not simply different cosmetic versions. Check your motor wiring layout, available mounting space and preferred motor connection arrangement before selecting a variant.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size:18px;font-weight:700;margin:24px 0 10px;color:#000;border-bottom:1px solid #eee;padding-bottom:6px;\"\u003eOpen Cooling Fin for Better Heat Dissipation\u003c\/h2\u003e\n\n\u003cp\u003e\u003cimg style=\"width: 100%; height: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/005_627df8a5-0f49-473a-bc11-ad7d1d354893.png?v=1788945085\" alt=\"Hobbywing XRotor Pro 40A ESC open cooling fin aluminum heatsink for better heat dissipation\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe XRotor PRO 40A uses an aluminum finned heatsink combined with a heat-conductive slotted structure. The open-fin design increases the available heat-dissipation area and helps move heat away from the ESC during demanding multirotor operation.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:18px;font-weight:700;margin:24px 0 10px;color:#000;border-bottom:1px solid #eee;padding-bottom:6px;\"\u003eDEO Driving Efficiency Optimization\u003c\/h2\u003e\n\n\u003cp\u003e\u003cimg style=\"width: 100%; height: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/004_a5d882d6-0fdc-4492-be25-af10c21be16e.png?v=1788945032\" alt=\"Hobbywing XRotor Pro 40A ESC DEO driving efficiency optimization for lower temperature and smoother throttle\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eHobbywing's \u003cstrong\u003eDEO (Driving Efficiency Optimization)\u003c\/strong\u003e technology is designed to improve driving efficiency and throttle linearity while reducing ESC operating temperature.\u003c\/p\u003e\n\n\u003cp\u003eWith DEO enabled, the ESC automatically brakes the motor when throttle is reduced, allowing motor speed to fall more quickly. On a multirotor, this faster response can contribute to more precise movement and improved flight-direction stability.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:18px;font-weight:700;margin:24px 0 10px;color:#000;border-bottom:1px solid #eee;padding-bottom:6px;\"\u003eRapid Throttle Response for Multirotors\u003c\/h2\u003e\n\n\u003cp\u003e\u003cimg style=\"width: 100%; height: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/003_41606643-f996-4cfd-acf9-24198df98f6a.png?v=1788945131\" alt=\"Hobbywing XRotor Pro 40A multirotor ESC special core program for rapid throttle response\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eA dedicated multirotor control program gives the XRotor PRO 40A rapid throttle response for situations such as hovering corrections and fast changes in motor speed.\u003c\/p\u003e\n\n\u003cp\u003eThe ESC supports throttle signal frequencies up to \u003cstrong\u003e621Hz\u003c\/strong\u003e, helping it work with a range of flight-control systems. Hobbywing notes that throttle signals above 500Hz are non-standard, so flight-controller configuration should always be checked before use.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:18px;font-weight:700;margin:24px 0 10px;color:#000;border-bottom:1px solid #eee;padding-bottom:6px;\"\u003eAutomatic Timing \u0026amp; Preset Parameters\u003c\/h2\u003e\n\n\u003cp\u003e\u003cimg style=\"width: 100%; height: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/002_2440ec7f-2ebe-48d5-ab64-9bf3af27e05a.png?v=1788945170\" alt=\"Hobbywing XRotor Pro 40A ESC automatic timing adjustment and preset parameters for multirotor setup\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe XRotor PRO platform uses intelligent default settings and automatic timing adjustment to simplify multirotor setup across a broad range of supported applications.\u003c\/p\u003e\n\n\u003cp\u003eRather than requiring extensive ESC parameter configuration, the XRotor PRO 40A keeps the user-adjustable programming focused on the \u003cstrong\u003eDEO ON\/OFF setting\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:18px;font-weight:700;margin:24px 0 10px;color:#000;border-bottom:1px solid #eee;padding-bottom:6px;\"\u003eCompact Protective Design\u003c\/h2\u003e\n\n\u003cp\u003e\u003cimg style=\"width: 100%; height: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/001_a0673c12-b152-41cb-acc2-ae61c0ba026a.png?v=1788944948\" alt=\"Hobbywing XRotor Pro 40A compact slim ESC design for multirotor installation\"\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe slim housing combines a protective plastic structure with the open heatsink design, giving the ESC a compact form for multirotor installations where electronics space and cable routing matter.\u003c\/p\u003e\n\n\u003cp\u003eBecause Version A and Version B use different output layouts and have different overall lengths, always compare the selected variant's dimensions with the available mounting area before installation.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:18px;font-weight:700;margin:24px 0 10px;color:#000;border-bottom:1px solid #eee;padding-bottom:6px;\"\u003eNo Built-In BEC – Receiver Power Required\u003c\/h2\u003e\n\n\u003cp\u003eThe XRotor PRO 40A is an \u003cstrong\u003eOPTO-style ESC with no built-in BEC\u003c\/strong\u003e. It therefore does not provide receiver or flight-controller power through an integrated BEC.\u003c\/p\u003e\n\n\u003cp\u003eYour installation must use an appropriate external power supply arrangement for the receiver and related electronics. Follow the wiring arrangement specified for your flight controller, receiver and power system rather than assuming the ESC throttle lead provides receiver power.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:18px;font-weight:700;margin:24px 0 10px;color:#000;border-bottom:1px solid #eee;padding-bottom:6px;\"\u003eBuilt-In Protection Functions\u003c\/h2\u003e\n\n\u003cp\u003eThe XRotor PRO 40A includes protection functions intended to reduce the risk of damage or uncontrolled operation when abnormal conditions are detected:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStart-up protection:\u003c\/strong\u003e shuts down motor output if the motor cannot start normally within approximately two seconds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOver-load protection:\u003c\/strong\u003e cuts output if the load suddenly rises to an abnormally high level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThrottle signal loss protection:\u003c\/strong\u003e cuts output when throttle signal loss is detected for more than approximately 0.25 second.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eProtection functions are not a substitute for correct component selection, installation, cooling and power-system setup.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:18px;font-weight:700;margin:24px 0 10px;color:#000;border-bottom:1px solid #eee;padding-bottom:6px;\"\u003eXRotor PRO 40A Manual \u0026amp; Setup\u003c\/h2\u003e\n\n\u003cp\u003eThrottle-range calibration should be performed when using a new XRotor brushless ESC or changing to another transmitter. Hobbywing also recommends removing the propellers before calibration or programming for safety.\u003c\/p\u003e\n\n\u003cp\u003eFor wiring diagrams, throttle calibration, DEO programming, start-up procedures, protection functions and troubleshooting, download the \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/Hobbywing_XRotor_Pro_40A_50A_ESC_Manual.pdf?v=1788942877\" style=\"color:#E60073;text-decoration:underline;font-weight:700;\"\u003eHobbywing XRotor PRO 40A \u0026amp; 50A ESC Manual\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:18px;font-weight:700;margin:24px 0 10px;color:#000;border-bottom:1px solid #eee;padding-bottom:6px;\"\u003eWhat to Check Before Buying\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eConfirm that your multirotor power system is within the \u003cstrong\u003e3–6S LiPo\u003c\/strong\u003e input range.\u003c\/li\u003e\n\u003cli\u003eConfirm that the expected continuous and peak motor current remain within the ESC's electrical limits.\u003c\/li\u003e\n\u003cli\u003eChoose the correct \u003cstrong\u003eVersion A wire-leaded\u003c\/strong\u003e or \u003cstrong\u003eVersion B COB\u003c\/strong\u003e motor connection layout.\u003c\/li\u003e\n\u003cli\u003eCheck the physical ESC dimensions and available mounting space.\u003c\/li\u003e\n\u003cli\u003eRemember that the XRotor PRO 40A has \u003cstrong\u003eno built-in BEC\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eConfirm your receiver \/ flight-controller power arrangement separately.\u003c\/li\u003e\n\u003cli\u003eProvide adequate airflow and cooling around the ESC.\u003c\/li\u003e\n\u003cli\u003eCheck motor, connector and wiring requirements before soldering or installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:18px;font-weight:700;margin:24px 0 10px;color:#000;border-bottom:1px solid #eee;padding-bottom:6px;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3 style=\"font-size:15px;font-weight:bold;margin:14px 0 8px;color:#000;\"\u003eHow many ESCs are included?\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eTwo ESCs are included.\u003c\/strong\u003e Both SKU 30902042 and SKU 30902041 are XRotor PRO 40A Dual Packs containing 2 × ESCs.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:15px;font-weight:bold;margin:14px 0 8px;color:#000;\"\u003eWhat is the difference between XRotor PRO 40A Version A and Version B?\u003c\/h3\u003e\n\u003cp\u003eVersion A uses motor output wires. Version B is the COB (Connector On Board) configuration, with gold-plated motor connectors mounted directly to the ESC circuit board and no conventional motor output leads.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:15px;font-weight:bold;margin:14px 0 8px;color:#000;\"\u003eDoes the XRotor PRO 40A support 6S LiPo?\u003c\/h3\u003e\n\u003cp\u003eYes. Hobbywing specifies the XRotor PRO 40A for \u003cstrong\u003e3–6S LiPo\u003c\/strong\u003e power systems.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:15px;font-weight:bold;margin:14px 0 8px;color:#000;\"\u003eDoes the XRotor PRO 40A have a BEC?\u003c\/h3\u003e\n\u003cp\u003eNo. The XRotor PRO 40A does not have a built-in BEC, so receiver and flight-control electronics require an appropriate separate power supply arrangement.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:15px;font-weight:bold;margin:14px 0 8px;color:#000;\"\u003eWhat is DEO technology?\u003c\/h3\u003e\n\u003cp\u003eDEO stands for \u003cstrong\u003eDriving Efficiency Optimization\u003c\/strong\u003e. With DEO enabled, the ESC can actively brake the motor when throttle is reduced, helping the motor slow more quickly while improving throttle linearity, driving efficiency and ESC operating temperature.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:15px;font-weight:bold;margin:14px 0 8px;color:#000;\"\u003eIs the XRotor PRO 40A designed for airplanes or RC cars?\u003c\/h3\u003e\n\u003cp\u003eThe XRotor PRO 40A is specifically developed as a \u003cstrong\u003emultirotor ESC\u003c\/strong\u003e. Hobbywing lists 550\/650-class quadcopters as its applicable multirotor class.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:15px;font-weight:bold;margin:14px 0 8px;color:#000;\"\u003eCan I program motor rotation for 3D flight on the XRotor PRO 40A?\u003c\/h3\u003e\n\u003cp\u003eThe XRotor PRO 40A manual lists \u003cstrong\u003eDEO ON\/OFF\u003c\/strong\u003e as its programmable item. Motor-rotation DIP-switch control described in the same manual applies to the XRotor PRO 50A, so it should not be assumed to be a programmable function of the PRO 40A.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:18px;font-weight:700;margin:24px 0 10px;color:#000;border-bottom:1px solid #eee;padding-bottom:6px;\"\u003ePackage Includes\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e2 × Hobbywing XRotor PRO 40A ESCs\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe exact motor-side configuration depends on the selected Version A or Version B \/ COB variant.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:18px;font-weight:700;margin:24px 0 10px;color:#000;border-bottom:1px solid #eee;padding-bottom:6px;\"\u003eExplore More Drone \u0026amp; Hobbywing ESCs\u003c\/h2\u003e\n\n\u003cp\u003eBuilding or maintaining another multirotor power system? Browse our \u003ca href=\"https:\/\/chinahobbyline.com\/collections\/drone-escs\" style=\"color:#E60073;text-decoration:underline;font-weight:700;\"\u003edrone ESCs\u003c\/a\u003e for additional electronic speed controller options, or explore the wider \u003ca href=\"https:\/\/chinahobbyline.com\/collections\/hobbywing-escs\" style=\"color:#E60073;text-decoration:underline;font-weight:700;\"\u003eHobbywing ESC collection\u003c\/a\u003e for RC aircraft, cars, boats and other applications.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#f7f7f7;padding:12px 15px;margin:20px 0 0;border-left:4px solid #E60073;font-size:14px;line-height:1.7;\"\u003e\n\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eSafety Notice:\u003c\/strong\u003e Brushless multirotor power systems can cause serious injury if incorrectly installed or operated. Read the Hobbywing manual before use, verify polarity and wiring before connecting a battery, and remove propellers when performing throttle calibration or ESC programming.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"ChinaHobbyLine","offers":[{"title":"Global \/ No Wire","offer_id":50361951781078,"sku":"30902041 GL","price":47.99,"currency_code":"USD","in_stock":true},{"title":"Global \/ With Wire","offer_id":50361951813846,"sku":"30902042 GL","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/20260909173602_52_298.jpg?v=1788946671","url":"https:\/\/chinahobbyline.com\/fi\/products\/hobbywing-xrotor-pro-40a-esc-dual-pack","provider":"ChinaHobbyLine","version":"1.0","type":"link"}