This product will now be replaced by the CarbonBird™ ESC 40a - same item with direct to us in AU return warranty  (no longer has to be sent to HongKong)

HobbyWing 40A ESC are made for MultiCopters - with full house connectors pre-installed - specifically wiithout a BEC - OPTO - less EMI in the multicopter frame and less heat -  you get a lot of electrical noise from 6 or 8 high amp uBECs in a radial pattern at the centre of your multicopter - The 40A Optos are well cooled with full 40Amp 6S rating - burst of 55A for 10 secs -  very smooth throttle curve and good quality silicon wires and Large Capacitor.  Best of all they output a massive 1008w on 6S (25.2v/55amps for 10 secs =>1300w) when needed with 2 x large Caps ; Plug-n-play JST on DC side and pre-fitted 2.0mm Female GBC on extra long 135mm three phase wires - fully RoHS - Flight tested with MultiWiicopter code - NAZA and Wookong - they are both 400 and 490hz compatible.

Features / Specifications

• Output:  Continuous 40A, Burst 55A up to 10 Secs.
• All connectors pre-installed 3.5mm for motor and XT60 for power distribution side - special feature of this website - all other sites - same esc has no plugs - nothing - be carefull
• Speed - both 400hz and 490hz compatible - DJi & MultiWii tested
• Heatsink : 2 layer OPTO ESC with heatsink - superior heat control and EMI shielding
• XT60 & 3.5 connectors factory installed ; fitted with female and 3.5mm-bullets (GBC)
• Input Voltage:  4-6 cells lithium battery
• BEC:  has no uBEC - nil - requires external uBEC - not included - special feature to reduce electrical noise in large multicopters
• Max Speed:  210,000rpm for 2 Poles BLM, 70,000rpm for 6 poles BLM, 35,000rpm for 12 poles BLM.(BLM: BrushLess Motor)
• Size:  52mm (L) * 28mm (W) * 10.5mm (H)
• Weight: 39g with all wires/XT60
• 100% compatible with HobbyWing Program Card
• 50mm 14AWG DC input leads with JST ; 135mm 3 phase output leads AWG 16
• Can be flashed with BLHeli/Active braking - DIY hack tested by MWC = compatible - Yes

Features

• Safety Arming Feature:  Regardless the throttle stick position, the motor will not spin after battery connected.
• Throttle Calibration: Throttle range can be configured to provide best throttle linearity, fully compatible with all market available transmitters.
• Programmable Items:
•        Brake Setting: brake enabled / brake disabled
•        Battery Type: Li-xx(Li-ion or LiPo) / Ni-xx(NiMh or NiCd)
•        Low Voltage Protection Mode(Cutoff Mode): Gradually reduce the output power / Cutoff the output power
•        Low Voltage Cutoff Protection Threshold (Cutoff Threshold): low / medium / high (Use a Quannum Telemetry unit - see gearList)
•        Start Mode: normal / soft / very soft
•        Timing: low / medium / high
•        Reset:  reset  all  the programmable items to their default settings
• Protection Features: Low voltage cutoff protection / Over-heat protection / Throttle signal lost protection

Advantages

• Military standard capacitor of extreme low resistance increases the ability of prevention of unwanted RF noise during flying.
• Extreme low resistance PCB is helpful for getting a super current endurance capability.
• Microprocessor uses separate voltage regulator IC, with good anti-jamming capability.
• Program with stick banging or ; with Hobbywing's Program Card (not included)
• 90 day return to factory (HobbyWing HK) warranty* Excludes misuse/over voltage/reverse voltage/over amp/short circuit or motor fault - see below

Important beginner NOTES on ESC set up :  Read this before connecting any ESC !!

• DO not connect the ESC back to front - ie reverse polarity - You will smoke it!
• Make sure to solder all ESC wires with Flux Paste (Not flux core solder) - a bad connection (a loose fitting connector)  or dry solder joint(no flux) - will cause the ESC to burn/fail and the motor to possibly burn as well.  Check all wiring with a DMM first.
• Use gold connectors and extra long banana plugs - do not trust factory installed banana plugs on cheapo brushless motors - remove the heat shrink on any cheapo Hobby clone Motors or rc-timer junk motors (or any clone) and remake the joint  properly using flux paste.
• During first throttle up power check - concentrate - if the motor hesitates or stutters - or the prop twitches back and forth - IMMEDIATELY cut power (throttle OFF) - investigate for a broken wire in the motor - a shorted wire in the motor (mounting screw ruptured the windings) - a shorted connector or insulation cut  - or anything blocking the motor from turning (a screw from your work bench trapped inside on the magnets).
• to reverse the direction of rotation of a brushless motor exchange any 2 of the 3 motor wires
• Use a power meter to ensure you are not overloading the ESC at WOT (full throttle for the prop) - ESC works hardest at mid throttle - so it's useless to think that if you don't fly full throttle you won't overheat the MOSFET because you are not using all the amps - completely opposite - the ESC will overheat if the kv of the motor is too high for the props used.  You must do a WOT check and make SURE at full throttle the MAX amps are 55amps or less !!!!!
• For MultiCopters - Use an external switching uBEC - after throttle calibration of the Tx range 1095/1500mid/1905 and also the ESC learning curve - then remove the red wires and apply heat shrink.