Log in to My Spektrum Get easy, online access to your Spektrum™ software updates, product registration and personalized settings.

40-Amp Pro Switch-Mode BEC Brushless ESC (V2)



*at participating retailers

Due Early August, 2020

40-Amp Pro Switch-Mode BEC Brushless ESC (V2)

Item #: EFLA1040B


Retail: $89.99*

Due Early August, 2020

Find a Retailer Buy Now *Avaliable at participating retailers


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
  • 3- to 6-cell Li-Po, 9- to 18-cell Ni-MH/Ni-Cd input voltage
  • Finned heat sinks
  • Programmable motor braking
  • Safe power-arm mode prevents accidental starts
  • Programmable low voltage cutoff with settings for 3-cell 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 throttle input range
  • 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 to use with a large variety of brushless motors
  • Utilizes new smaller Mosfet technology to minimize weight
  • Radio System Power ON /OFF Switch
  • Prewired connectors—E-flite EC3™ connector on battery input and 3.5mm gold bullet connectors on motor output leads

Product Specifications

Continuous Maximum Current:
40A (Proper cooling and airflow required)
Input Voltage:
3–6S Li-Po or 9–18 Ni-MH/Ni-Cd
Input Connector Types:
13 AWG with E-flite EC3 Connector
Output Connector Types:
13 AWG with 3.5mm Gold Bullet Connectors
Momentary Peak Current:
55A (15 sec) (Proper cooling and airflow required)
68.0mm (2.70 in)
33.0mm (1.30 in)
13.0mm (0.50 in)
62.0 g (2.20 oz)


E-flite® 40-Amp Pro Switch-Mode BEC Brushless ESC (V2) 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.

Manuals and Support


Articles, Reviews, How-Tos & More

Related Parts

Used In...  See All

  • Shoestring 15e ARF[EFL4205]

  • 40-Amp Lite Pro Switch-Mode BEC Brushless ESC[EFLA1040L]

  • 60-Amp Pro Switch-Mode BEC Brushless ESC[EFLA1060]

  • Park 480 Brushless Outrunner Motor, 910Kv[EFLM1500]