ReadyToSky 40A ESC

The ReadyToSky 40A is a single brushless ESC that drives one motor, made for multirotors such as F450, S500 and ZD550 quadcopters. It comes in 2-6S and 2-4S versions, each with either 3.5 mm banana connectors or bare motor leads for direct soldering.

Key features

• 40A continuous rating; the 2-6S version handles 60A bursts for up to 10 seconds
• The 2-6S version is opto-isolated, keeping the receiver signal side separate from the battery and motor side
• The 2-4S versions include a 5 V, 3 A BEC output for a receiver or flight controller
• Throttle signal refresh up to 621 Hz for compatibility with common flight controllers; rates above 500 Hz are non-standard
• Twisted throttle signal lead reduces crosstalk, and motor timing is selectable between high and middle
• Factory firmware is tuned for disc-type multirotor motors; the 2-4S version cannot be re-flashed

Specifications

• Continuous current: 40 A
• Burst current: 60 A for 10 s (2-6S version)
• Input voltage: 2-6S or 2-4S LiPo, by version
• Motor leads: 3.5 mm banana connectors or bare wires, by version
• BEC output: 5 V, 3 A (2-4S versions)
• Throttle refresh rate: up to 621 Hz
• Timing: high / middle

Choose the 2-6S version for 5S or 6S packs; a 2-4S unit must never run on more than 4S. Check that your motor's peak current on the chosen prop stays below 40A, and note that the 2-6S version ships without the black wire, as listed by the maker.