Key Features
- Up to 40 amps continuous current with proper air flow and 55 amps burst current (15 seconds)
- 5A continuous current, 5V Switch-Mode BEC Circuit (Proper cooling and airflow required)
- Stronger BEC for support of most 3-axis stabilization systems
- Drive up to 7 analog or 6 digital standard-sized servos with the BEC on any recommended input voltage
- 3- to 6-cell Li-Po, 9- to 18-cell Ni-MH/Ni-Cd input voltage
- Programmable motor braking
- Safe power-arm mode prevents accidental starts
- Programmable low voltage cutoff with settings for 3-cell Li-Po (9.2V), 4-cell Li-Po (12V), 5-cell Li-Po (15V), 6-cell Li-Po (18V) or 74% of battery starting voltage
- Programmable throttle input range (1.1ms-1.9ms or 1.2ms-1.8ms)
- Programmable soft start for helis and airplanes
- Auto motor shut down if signal is lost or there is interference
- Programmable timing-5 user-selectable ranges, use with a large variety of brushless motors
Overview
The E-flite® 40-Amp Lite Pro Switch-Mode BEC Brushless ESC (V2). This is a high-quality sensorless brushless electronic speed control with an integrated switch-mode BEC that is very lightweight and efficient. It can operate without the need for a separate receiver battery to power your servos and receivers, saving you weight and complication.
Overview
The E-flite® 40-Amp Lite Pro Switch-Mode BEC Brushless ESC (V2) represents a significant advancement in electronic speed control technology for the RC enthusiast community across the UK and beyond. This high-quality sensorless brushless electronic speed control features an integrated switch-mode BEC (Battery Elimination Circuit) that combines lightweight construction with exceptional efficiency, making it an ideal choice for those looking to upgrade their brushless RC car, plane, or helicopter setup. Whether you're a seasoned competitor running a brushless RC vehicle or a dedicated hobbyist seeking reliable performance, this ESC delivers the precision control and robust protection you need for consistent, thrilling results on the track or in the sky.
One of the standout advantages of this brushless ESC is its ability to operate without the need for a separate receiver battery pack, which means you can power your servos and receivers directly from the main drive battery through the integrated BEC. This clever integration saves you valuable weight and eliminates the complexity of managing multiple power sources, both of which are crucial considerations whether you're optimising for speed, efficiency or simply enjoying casual bashing with your favourite brushless RC model. The V2 iteration builds upon the proven foundation of the original Lite Pro design, offering improved reliability and expanded compatibility with a wider range of brushless motor types and power configurations.
The E-flite 40-Amp Lite Pro is engineered for versatility, supporting everything from lightweight micro RC aircraft and helicopters to mid-range electric RC cars and trucks. Its programmable architecture gives you complete control over motor behaviour, throttle response and safety parameters, ensuring that whether you're flying acrobatic 3D aerobatics, performing stabilised hovering, or launching aggressive ground attacks on a purpose-built course, your brushless motor responds exactly as you intend.
Key Features
- 40 Amps Continuous / 55 Amps Burst Current — The ESC delivers up to 40 amps of continuous current (with proper cooling and airflow) and can handle peak burst loads of 55 amps for 15 seconds, giving you the headroom to run demanding brushless motors or perform aggressive manoeuvres without triggering protection cutoffs during normal operation.
- Integrated 5A Continuous Switch-Mode BEC at 5V — The built-in Battery Elimination Circuit provides 5 amps of continuous current at a regulated 5-volt output, sufficient to power the receiver and up to 7 analogue or 6 digital standard-sized servos simultaneously, eliminating the need for a separate battery pack and reducing overall system weight and complexity.
- Enhanced BEC for 3-Axis Stabilisation Systems — The stronger BEC design specifically supports most modern 3-axis gyroscopic stabilisation systems commonly found in RC helicopters and advanced flight control systems, providing the stable, clean power these sensitive flight control electronics demand.
- Flexible Battery Compatibility — The ESC accepts input from 3- to 6-cell lithium polymer batteries (9.9V to 22.2V) or 9- to 18-cell nickel-metal hydride/nickel-cadmium battery packs, making it compatible with virtually any modern brushless RC setup you might already own or plan to build.
- Programmable Motor Braking — You can enable and adjust regenerative or active motor braking, allowing your brushless motor to help slow the model and reduce coasting, which is particularly valuable in competitive racing or precision flying scenarios.
- Safe Power-Arm Mode — This protective feature prevents accidental motor starts by requiring a deliberate arming sequence, protecting yourself, bystanders and your RC model from unexpected spinning propellers or wheels before you're ready to operate.
- Programmable Low Voltage Cutoff (LVC) — The ESC includes pre-programmed low voltage protection tailored to your specific battery chemistry, with settings optimised for 3-cell (9.2V), 4-cell (12V), 5-cell (15V) and 6-cell (18V) LiPo packs, or alternatively, you can select 74% of your battery's starting voltage for automatic battery protection.
- Adjustable Throttle Input Range — Programming options allow you to set the throttle input range to either 1.1ms–1.9ms or 1.2ms–1.8ms, ensuring precise calibration with your specific radio transmitter and receiver for dead-zone-free control.
- Programmable Soft Start — Helicopters and aeroplanes benefit from ramped motor acceleration rather than instant throttle engagement; this feature allows smooth power application, protecting gearboxes, drivetrain components and ensuring stable flight characteristics.
- Automatic Signal Loss Protection — If your radio signal is lost or interference is detected, the motor automatically shuts down, preventing runaway behaviour and keeping your RC model safe in the event of radio connection failure.
- Five User-Selectable Timing Ranges — The programmable timing feature offers five different motor timing configurations, allowing you to optimise performance across a vast range of brushless motor types and KV ratings for maximum efficiency and responsiveness.
- EC3 Connector — The industry-standard EC3 connector ensures broad compatibility with most modern brushless batteries and accessories commonly found in the RC hobby, and the 3.5mm bullet connector output can be adapted to match your motor connector type.
Technical Performance
The E-flite 40-Amp Lite Pro Switch-Mode BEC Brushless ESC (V2) is engineered with the latest sensorless brushless ESC technology, combining efficient power delivery with intelligent thermal management. The switch-mode BEC design operates far more efficiently than older linear BEC designs, generating less heat and preserving battery capacity for motor power rather than wasting it as heat in voltage regulation circuits. This is particularly important when running on higher-voltage battery packs such as 5S and 6S LiPo batteries, where linear BECs would become inefficient and potentially overheat. The ESC's sensorless brushless architecture means there are no sensor wires to run to the motor, simplifying installation in tight spaces common in competition-grade RC cars, lightweight aircraft and compact helicopter frames. With a 40-amp continuous rating and 55-amp burst capacity, this ESC is well-suited to motors in the mid-range, handling anything from efficient 2200–3200KV brushless outrunners in lightweight aircraft to higher-torque, lower-KV motors in RC cars and trucks. The programmable nature of the ESC means you're not locked into a single configuration; timing, braking, throttle response and protection thresholds can all be adjusted via a programming card or compatible transmitter interface, making this ESC an excellent long-term investment that will work with multiple brushless setups throughout your RC journey.
What's in the Box
- E-flite 40-Amp Lite Pro Switch-Mode BEC Brushless ESC (V2)
- EC3 connector equipped
What You Need to Complete
- Brushless motor (sensorless, suitable for your application)
- LiPo or NiMH/NiCd battery pack (3–6S LiPo or 9–18 cell NiMH/NiCd)
- RC receiver compatible with your transmitter
- Servo(s) for control surfaces or steering
- Battery charger suitable for your chosen battery chemistry
- Programming card or transmitter programming capability (for configuration)
- Motor connectors (if not already installed on your motor)
Frequently Asked Questions
- Is the E-flite 40-Amp Lite Pro ESC suitable for beginners building their first brushless RC car or plane? — Yes, this ESC is excellent for beginners because it includes protective features like safe power-arm mode, automatic signal loss shutdown, and programmable low voltage cutoff that prevent common mistakes. However, beginners should be aware that configuration requires either a programming card or compatible radio system capable of ESC programming. Most modern RC transmitters include this feature, but it's worth confirming before purchase.
- What battery does the E-flite 40-Amp Lite Pro ESC need? — This ESC accepts 3- to 6-cell lithium polymer (LiPo) batteries with voltage ranges from 9.9V to 22.2V, or alternatively 9- to 18-cell nickel-metal hydride (NiMH) or nickel-cadmium (NiCd) battery packs. Most modern RC enthusiasts favour LiPo batteries for their superior performance, lightweight and high discharge rates; a 3S (11.1V) or 4S (14.8V) LiPo is a good starting point for many applications.
- Can the integrated BEC power my receiver and servos without a separate battery pack? — Yes, absolutely. The 5-amp continuous 5V BEC can power your receiver and up to 7 analogue or 6 digital standard-sized servos directly from the main drive battery, eliminating the need for a separate receiver pack. This is one of the major advantages, saving weight and complexity in your RC setup.
- How does this ESC compare to other 40-amp brushless ESCs on the market? — The E-flite Lite Pro distinguishes itself through its integrated switch-mode BEC (which is more efficient than linear BECs), extensive programmability, lightweight design suitable for aircraft and helicopters, and robust safety features including soft start and signal loss protection. The V2 iteration offers improved reliability over the original version. For most UK RC hobbyists, this represents exceptional value compared to higher-priced competition-grade alternatives.
- What is the difference between this V2 and the original E-flite 40-Amp Lite Pro ESC? — The V2 designation indicates a revised design with improved firmware, enhanced reliability and potentially expanded motor compatibility over the original version, though both share the same core 40-amp rating and switch-mode BEC architecture. E-flite continually refines their designs based on user feedback and field testing.
- Is this ESC waterproof for use in water-based RC models? — The sources provided do not specify waterproof ratings for this ESC. We recommend contacting RC Model Shop directly for clarification if you intend to operate this ESC in wet conditions or aquatic environments.
- Can I use this ESC with helicopters, fixed-wing aircraft and RC cars? — Yes, the programmable soft start feature makes it ideal for helicopters and aeroplanes, whilst the flexible timing options and protective features suit ground vehicles equally well. The 5A BEC supports 3-axis stabilisation systems common in modern RC helicopters.
Why Buy from RC Model Shop?
RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the EFL 40-Amp Lite Pro Switch-Mode BEC Brushless ESC (V2) P-EFLA1040LB today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.
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