SENSORED MOTOR: 4-POLE SENSORED BRUSHLESS 2535-520KV MOTOR
The Castle 2535-520KV is the largest and most powerful motor ever produced by Castle in our 28+ year history. Designed to produce the torque and power for vehicles weighing up to 50lbs and up to 12s LiPo. When paired with the Castle Cobra 5 HV, the 2535 - 520kv can easily push 1/5th and 1/4th vehicles like the Losi 5IVE-T, 5IVE-B, or DBXL-E. It is the perfect upgrade for any 1:5 and 1:4 scale RC hobby vehicles (including gas to electric conversions) weighing up to 50 lbs. It also boasts features in our new V3 motor design, including a larger rear bearing, direct to bullet winding connections, smooth can exterior making water cooling a breeze, and a stainless steel sleeve rotor.
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Minimum Input Voltage: 3s |
| Maximum Input Voltage: 12s |
| Sensored Capable: Yes |
| Recon G6 Certified Motor: No |
| ROAR Certified Motor: No |
Technical Specs
| Input Voltage Range: | 3s - 12s LiPo (50.4v) Max |
| Kv: | 520 |
| Max RPM: | 38,000 |
| Size: | Length: 5.8" (147.5mm) Diameter: 2.7” (68.7mm) |
| Weight (w/wires): |
84.8 oz. (5.5lbs) / 2.4kg |
| Max Recommended Vehicle Weight: |
50lbs |
| Shaft Size: |
Length: 30mm Diameter: 8mm |
| Mounting Hole Specs: | 4mm @ 30mm, 4mm @ 40mm |
| Connectors: | 8mm male Castle Bullet Connectors on 6 AWG wire |
| Items Needed for Operation: | Compatible Electronic Speed Control (ESC). We recommend the Cobra 5 HV. |
| Product Use Statement: |
Monitor motor temperatures closely; overheating a motor will cause permanent damage to the magnets. Never exceed 180° F on the the motor or ESC.
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| Tech Tips: |
Running modes: Sensorless and Sensored |
- Our IMPROVED 4-POLE 12-SLOT design boasts exceptional EFFICIENCY and produces LESS HEAT.
- QUIETSENSE™ technology shields the sensors from magnetic field noise generated from the motor coils and keeps your motor and ESC in sync at all times. Use of a Flux Shield™ in conjunction with secondary Sense Magnets delivers even HIGHER PRECISION and MORE EFFICIENT startups.
- Our OPTIMIZED design eliminates the need for mechanical timing adjustments. Our sensor alignment method delivers uniform timing and torque in both directions, automatically.
- Updated modern and sleek design; looks as cool as it performs.
You will reap the benefits of longer run times on one battery and a cooler running motor that can be pushed harder.
We take OVERPOWERING seriously.
Castle engineers always add a little something extra in their designs that takes your performance to the next level. We have not skimped here. Many customers have utilized our industry leading software functionality that Castle Link* offers. When paired with a Castle Creations sensor supported ESC, you can unlock advanced tuning capabilities that Castle Link provides specifically for sensored motors.

SMARTSENSE™ uses the motors sensors to start the motor to provide smooth starts, excellent torque, and low-speed drivability. Once the motor is turning, it seamlessly transitions to Castle’s ULTRA- EFFICIENT sensorless mode. When running, a motor must transition between different load points and a different timing advance is required for optimal efficiency at all load points. Using mechanical timing adjustments alone, you can only target one driving condition, such as higher start power or higher top end speed. This sacrifices performance and efficiency during the other driving phases. Electronic timing in SMARTSENSE™ will advance timing automatically for peak performance during all driving conditions. This allows users to combine the best of both worlds in an unrivaled HYBRID between smooth sensored startups and high-efficiency sensorless drive.
With a Castle sensored ESC and sensored motor you will have the ULTIMATE POWER PLANT for your vehicle. Users will experience PRECISE throttle control, BUTTERY SMOOTH starts, PEAK PERFORMANCE and EFFICIENCY throughout the full throttle range. You will feel the POWER and LONGER RUN TIMES that a WORLD-CLASS motor produces.
Resources
Castle Creations warrants this product to be free from manufacturing defects for a period of one year from date of purchase.
This product may contain chemicals known to the State of California to cause cancer and or birth defects or other reproductive harm.
Product designed in Olathe, Kansas USA.