HobbyStar 540 4-Pole Brushless Sensorless Motor

SKU: 375-03-CNF

Availability: In stock


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The HobbyStar 540 4-pole brushless, sensorless motor is perfect where a high-torque, high-performance powerplant is required.  A beautifully machined T6 billet-aluminum housing contains a 4-pole, 12-slot high-torque rotor spinning on High-RPM ABEC5 oversized bearings for a powerful, reliable motor choice for your 1/10 scale vehicle.  Comes with motor leads with 4.0mm bullet connectors already installed. Available in a wide variety of KV ratings.



  • 4-pole 12-slot high-torque design
  • CNC machined 6061 T6 billet aluminum can
  • High-purity copper windings maximize efficiency
  • High-RPM ABEC5 oversized bearings
  • Precision balanced rotor for smooth operation and maximum RPM
  • Super-thin (0.2mm) stator laminations 
  • Removable/replaceable rotor
  • Precision Engineered for maximum energy conversion


Product KV (RPM/Volt) Max Voltage Max Amps Rotor Poles IO Resistance Watts Max RPM Length (mm) Diameter (mm) Weight (g) Shaft Diameter (mm) Shaft Length (mm) Connectors
540/3Y 3100 3S 56A 4 1.4A 0.0116 900W 50,000 50 36 180 3.175 15 4.0mm gold
540/5T 3400 3S 61A 4 1.7A 0.0108 900W 50,000 50 36 180 3.175 15 4.0mm gold
540/4.5T 3900 2S 69A 4 2.0A 0.0081 900W 50,000 50 36 180 3.175 15 4.0mm gold
540/4T 4300 2S 75A 4 2.7A 0.0075 900W 50,000 50 36 180 3.175 15 4.0mm gold
540/3.5T 5200 2S 94A 4 3.7A 0.0051 900W 50,000 50 36 180 3.175 15 4.0mm gold
540/3T 5800 2S 107A 4 5.2A 0.0043 900W 50,000 50 36 180 3.175 15 4.0mm gold


Customer Reviews (4)

awesome motor Review by Bigman
i can believe how powerful this motor is for the price. extremely satisfied with this motor (Posted on 11/24/2017)
I just love it!Review by Charles
This motor make my Granite go insane!! Tons of torque it barely get warm!! (Posted on 6/23/2017)
Great on 2 or 3SReview by Jacob C.
Wanted a motor I didn't have to change gears on every time when switching between 2 and 3s. The 3400kv ended up fitting my needs perfectly with a 56s/12p setup. I couldn't even get this thing past 105° pushing it hard on or offroad combined with the HobbyStar 120A and that was even during the California summer. I honestly don't want to go any faster. My little slash is a rocket now. (Posted on 9/5/2016)
Great productReview by Ryan Cook

Runs smooth fast and lots of power (Posted on 4/3/2016)

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No these are not.
RCJuice answered on February 18, 2019

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