E-flite 40A Pro Switch-Mode BEC Brushless ESC

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The E-flite 40A Pro Switch-Mode BEC Brushless ESC is a high-quality, innovative and efficient sensorless brushless electronic speed control with an integrated switch-mode BEC. It can operate without the need for a separate receiver battery to power your servos and receivers, saving you weight and complication. It is capable of up to 40 amps continuous current when using 3- to 6-series Li-Po battery packs. You can drive up to 7 analog or 6 digital standard-sized servos with the BEC on any recommended input voltage. This ESC also features an exposed, finned heat sink aluminum case with lightweight plastic endcaps. Additional features include safe power arming along with advanced programmable features such as low voltage cutoff, braking, timing, throttle input range, and more, making this truly a ‘pro series’ speed control.

  • Up to 40A continuous current with proper air flow, with 55A burst current (15 seconds)
  • 5V switch-mode BEC circuit capable of 2.5A continuous current on any recommended input voltage
  • Drive up to 7 analog or 6 digital standard-sized servos with the BEC on any recommended input voltage
  • 3–6S Li-Po, 9- to 18-cell Ni-Cd/Ni-MH input voltage
  • Finned heat sinks
  • Programmable motor braking
  • Safe power-arm mode prevents accidental starts
  • Programmable low voltage cut-off with settings for 3S Li-Po (9V), 4-cell Li-Po (12V), 5-cell Li-Po (15V), 6-cell Li-Po (18V), or 70% of battery starting voltage
  • Programmable soft start for helis and airplanes
  • Auto motor shutdown if signal is lost or there is interference
  • Programmable timing—5 user-selectable ranges for use with a large e variety of brushless motors
  • Programmable throttle input range (1.1–1.9ms or 1.2–1.8ms)
  • Heli mode for starting the motor with a low speed ratio
  • Utilizes new smaller Mosfets technology to save weight
  • Radio System Power On/Off Switch
  • Optional RS232 Serial Link available for programming
  • Pre-wired connectors—E-flite® EC3 on battery input and 3.5mm female

Yes - Programmable
Continuous Maximum Current:
40A with reasonable cooling
Input Voltage:
10.8V - 22.2V
Input Connector Types:
13 AWG with E-flite EC3 Connector
Output Connector Types:
13 AWG with 3.5mm Female Gold Bullet Connectors
Momentary Peak Current:
55A (15 sec)
Dimensions (WxLxH):
68x33x13 mm (2.7x1.3x.5 in)
62g (2.2 oz)
Wire Gauge:
13 AWG

This product was added to our catalog on November 6, 2007.