40A 2-6S ESC – Opto-Isolated Motor Speed Controller for Quadcopters

The ReadytoSky 40A 2-6S ESC is an opto-isolated electronic speed controller designed for quadcopters and multi-rotors. It uses an opto-coupler to isolate the high-power battery and motor side from the receiver signal side, delivering faster and more precise motor speed control for improved flight performance.

Specifications

• Continuous current: 40A
• Battery input: 2S to 6S LiPo (7.4V – 22.2V)
• Type: Opto-isolated (no BEC)
• Signal input: Standard PWM receiver signal
• Firmware: Pre-flashed with BLHeli or compatible
• Dimensions: Approximately 25mm x 15mm x 6mm (verify with product)
• Weight: ~8g (verify with product)

Compatible with

• Arduino (via PWM signal generation)
• ESP32 and ESP8266 (for custom flight controllers)
• Raspberry Pi (with PWM hat or GPIO)
• Standard RC receivers (PPM/PWM)
• Flight controller boards (Pixhawk, CC3D, etc.)

What you can build with it

• 250mm to 450mm quadcopter frames for FPV racing or aerial photography
• Hexacopter or octocopter multi-rotor builds for heavy-lift or redundancy
• Custom drone projects for school or engineering lab demonstrations

Built and Backed by Compoden

Every ESC purchase includes access to our AI build companion — delivered via QR, email, or WhatsApp — that helps you wire and program this part into a working quadcopter project. With 10 years of experience supplying makers and institutions across India, we ensure you get the right component and the support to use it. Pay your way: UPI, cards, or Cash on Delivery, anywhere in India.

What is an opto ESC and why use it?

An opto ESC uses an opto-coupler to electrically isolate the receiver signal from the high-power motor circuit. This reduces electrical noise and interference, making it ideal for sensitive flight controllers in multi-rotor builds.

What payment options are available for 40A 2-6S ESC?

You can pay via UPI, credit/debit cards, or Cash on Delivery (COD). All options are available across India.

How do I connect this ESC to my flight controller?

Connect the ESC's signal wire (usually white or yellow) to a PWM output pin on your flight controller. The red and black wires go to the battery. Ensure your flight controller firmware supports the ESC protocol (e.g., Oneshot125, Multishot).

Does this ESC come with a BEC?

No, this is an opto-isolated ESC without a BEC. You will need a separate BEC or power module to supply 5V to your receiver or flight controller.

What is the delivery time for this ESC?

We ship 40A 2-6S ESC across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders typically arrive within 3–7 business days depending on your location.