40-Amp Pro Switch-Mode BEC Brushless ESC

The E-flite 40 A Pro Switch-Mode BEC Brushless ESC (V2, model EFLA1040B) offers efficient and powerful speed control with an integrated switch-mode BEC—eliminating the need for a separate receiver battery. This compact unit is perfect for sport, scale, and trainer class aircraft that require reliable power and streamlined setup.

Features

• 40 A continuous current (requires proper airflow); 55 A burst (15 s)
• 5 V, 5 A switch-mode BEC—supports up to 7 analog or 6 digital servos
• Operates on 3–6S LiPo or 9–18 cell NiMH/NiCd batteries
• Finned heatsink design for efficient cooling
• Programmable features: braking, low-voltage cutoff, throttle range, soft start, timing, and failsafe
• Safe power-arm mode to prevent accidental motor activation
• Prewired with EC3 battery input and 3.5 mm bullet motor leads

What’s Included

• E-flite 40 A Pro Switch-Mode BEC ESC (V2) with EC3 connector

Needed to Complete

• Compatible brushless motor
• Appropriate battery setup (3–6S LiPo or similar)
• Programming tool or throttle stick for ESC configuration

Specifications

• Continuous Current: 40 A
• Burst Current: 55 A (15 s)
• Input Voltage: 11–22 V (3–6S LiPo, 9–18 NiMH/NiCd cells)
• BEC Output: 5 V, 5 A
• Weight: ~62 g
• Dimensions: 68 × 33 × 13 mm (L × W × H)
• Wire Gauge: 13 AWG