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ZTW Spider Series 40A Multirotor ESC

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Price: $22.99
In Stock
Item Number: SPIDER-ZTW40A
Manufacturer: ZTW
Mfr Part No: 5040301

ZTW Spider Series 40A OPTO Multicopter ESC

Solid performance at an affordable price.

ZTW Spider Series ESCs are high quality speed controllers designed specifically for multi-rotor aircraft. Flashed with popular SimonK firmware for multi-rotor. Spider Series ESCs feature up to 600Hz refresh rates for an incredibly smooth yet crisp flight controller response. These ESCs also feature excellent throttle linearity without sacrificing a rapid, crisp response to throttle input. As usual. Spider Series ESCs come standard with the ZTW quality, performance, and reliability you have come to trust.

  • Flashed with SimonK firmware (v11.9.2013)
  • Extremely low internal resistance
  • Super smooth and accurate throttle linearity
  • Safety thermal over-load protection
  • Auto throttle shut down in signal lose situation
  • Supports high RPM motors
  • Power arming protection (prevents the motor from accidentally running when switched ON)
  • Use new generation of the MOSFETs to make sure the ESC with low heating and more reliability


  • SimonK Firmware
  • Output: 40A continuous, 50A burst
  • Max power: 630W
  • Input Voltage: 2-6s lipo
  • BEC Output: OPTO (NO BEC)
  • Dimensions: 52 x 27 x 10 mm
  • Weight: 33g

Before you buy these, you should make yourself familiar with the somewhat experimental nature of the SimonK firmware. This software pushes the motor response to the limit.  Due to the lack of overcurrent/overheat/low voltage sensing, it's easier to destroy the ESC and possibly the motor.  Please consult the SimonK threads on various forums for more info. The esc reseller, esc manufacturer, nor SimonK will be responsible for any damage that may occur from use of this product.  Please know and accept the risks before using these.  SimonK firmware is the firmware of choice for hobbyists as well as professional multi-rotor pilots.

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