Diamondback 120A ESC & 550 4-Pole 550 Sensorless Brushless Combo (3500Kv) by Maclan

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Frederick, MD

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This item is discontinued and no longer available for purchase. You may want to search our site for a similar item.
Low Price: $199.99
Discontinued Online

This product was added to our catalog on December 11, 2015.

The Maclan Diamondback 120A Waterproof Sensorless Brushless ESC & MX550 4-Pole 550 Sensorless Brushless Motor Combo was developed to provide a high power, waterproof ESC option for 1/10 4wd vehicles and 1/10 monster trucks. The waterproof structure with aluminum case provides the most robust case in its class, and the ability to use Maclan's ProLink (not included) makes tuning a breeze.

The Maclan Diamondback MX550 3,500Kv 4-Pole Sensorless 550 Brushless Motor delivers 4-pole performance and quality, with a friendly price tag for racers and bashers. 4-pole technology brings mega torque to all 1/10 4wd applications, and 3500KV and 4200KV options are available to give another option for a high power upgrade. Plus, the 3500KV supports up to 3S Li-Po for insane power!


  • Diamondback 120A ESC
    • Optimized brushless technology firmware that offers the smoothest start up and acceleration power.
    • Aluminum waterproof case structure.
    • Bullet connectors and pre-soldered T style connector that makes the Diamondback combo a plug-n-play system out of the box.
    • Maclan Racing ProLink (sold separately) allows all parameters for detailed adjustment, ESC firmware update, and PC Software.
    • Waterproof aluminum case with forced cooling fan for optimized thermal performance and most robust structure.
    • Auto Li-Po count and low-voltage-cut-off protection, ESC thermal protection.
  • MX550 Motor
    • Most sophisticated design and highest quality in its class.
    • 12-Slot/4-Pole design with mega torque
    • All aluminum structure for maximum thermal dissipation and long term durability
    • Premium material  for maximum performance
    • Rebuildable design with all spare parts available from Maclan Racing
    • Longer 550 class in size of 36mm x 60mm


  • Diamondback 120A ESC
    • Input Voltage: 2S~3S Li-Po
    • Support Motor: Brushless Sensorless
    • Continues/Burst Current: 120A/600A
    • BEC Output: 6V/5A Linear
    • Cooling Fan: Standard
    • Bullet Connectors: 4.00mm
    • Dimension: 52.5x39.8x29.25mm
    • Weight: 97g
    • Support Vehicle Weight: ≥6 lb
  • MX550
    • KV Options: 3500KV 
    • Case Length: 60mm/2.36in
    • Case Diameter: 36mm/1.42in
    • Shaft Extension: 14.8mm/0.58in
    • Shaft Diameter: 5.00mm/0.19in
    • Weight: 235g/8.2oz 3g
    • Poles: 4 Poles
    • Max Li-Po Cell: 3500KV@3S

George Frazier
Verified Owner
Tuesday, Jul 19 2016 (about a year ago)
Maclan Diamondback 120A ESC & 550 4-Pole 550 Sensorless Brushless Combo (3500Kv)
I have to say I had high hopes for this new product. I had a brand new unit returned only to have the same issues. I have tried every combination I can think of with this speed control. The motor is fine but the speed control with every combo I tried to include spectrum, fly sky and Futaba radios with and without glitch busters. This speed control still glitches when at full speed. I have tried to update the speed control software but it has had no effect. I have spent so much time trouble shooting this thing it has ended up in the bottom of my pit box and I can't even be bothered to contact customer support again to spend more time on this. I would rather be racing so I am running my original speed control(dynamite) and the Maclan motor which seems to work well with my MIP losi scte.)