Inner-rotor construction
Low rotor inertia supports quick acceleration and responsive dynamic operation.
Select a platform for your application
Technical Data
SDT BL series brushless DC motors combine rare-earth magnets and aluminium housings with options for matched electronic drives, encoders and other feedback systems. Designed for quiet, efficient operation, they offer a range of continuous torque and speed capabilities for demanding applications where low noise and long service life matter.
24–150 mm frame sizes5 W–6 kW rated output range12–320 VDC typical voltage range
| Motor example | Frame size (mm) | Typical voltage (VDC) | Rated output power (W) | Typical rated speed (rpm) | Continuous torque (N·m) | Peak torque (N·m) | Typical motor length (mm) |
|---|---|---|---|---|---|---|---|
| 24 | 12–24 | 5–15 | 3,000–8,000 | 0.01–0.04 | 0.03–0.10 | 30–50 | |
| 33 | 24–48 | 7–40 | 3,000–10,000 | 0.02–0.05 | 0.07–0.15 | 38–80 | |
| 42 | 24–36 | 25–125 | 3,000–4,000 | 0.06–0.30 | 0.18–0.90 | 40–90 | |
| 57 | 24–48 | 40–180 | 3,000–4,000 | 0.12–0.60 | 0.35–1.80 | 50–110 | |
| 60 | 24–48 | 50–200 | 3,000–4,000 | 0.15–0.60 | 0.45–1.80 | 50–120 | |
| 80 | 24–48 | 125–750 | 3,000–6,000 | 0.40–3.50 | 1.2–10.5 | 75–130 | |
| 85 | 24–48 | 110–800 | 1,000–3,000 | 0.35–2.50 | 1.0–7.5 | 55–135 | |
| 90 | 24–310 | 150–800 | 1,000–3,000 | 0.50–2.50 | 1.5–7.5 | 70–140 | |
| 110 | 48–310 | 500–3,000 | 1,000–3,000 | 1.6–9.5 | 5–29 | 85–230 | |
| 130 | 48–310 | 750–3,000 | 2,000–3,000 | 2.5–12 | 7–30 | 115–200 | |
| 150 | 48–320 | 3,000–6,000 | 1,500–3,000 | 16–24 | 35–60* | 175–260 |
Values shown are representative ranges across motor configurations. The limits within a row do not describe one simultaneous operating point. Final ratings depend on the selected winding, motor length, drive, cooling and duty. Alternative voltages, speeds, feedback systems, shaft configurations and mechanical arrangements are available to suit the application.
Beyond the standard range
Custom BL180 Configuration
For requirements outside the listed platforms, discuss a tailored motor and drive configuration with SDT. Dimensions and performance are confirmed against your specification.
Explore More →Confirm the Motor for Your ApplicationRequest the selected motor datasheet, dimensions and matched drive information.
Request Technical Datasheet →BL series construction
Main Technical Features
A scalable inner-rotor brushless platform developed for responsive, efficient and reliable operation.
Pole configuration
Eight-pole construction is standard, with four-pole configurations available for higher-speed duties.
Output capability
BL platforms cover compact fractional-power duties through higher-output solutions rated up to 6 kW.
Permanent-magnet rotor
High-energy neodymium rare-earth magnets support compact size, efficiency and torque density.
High-speed operation
Selected windings and rotor configurations support operating speeds up to 20,000 rpm.
Insulation system
Class F and Class H winding-insulation systems are available to suit the thermal requirement.
Cooling and balance
IC410 non-self-ventilated construction, with precision rotor balancing to G2.5 where required.
Thermal protection
Normally closed thermal-cutout protection can be incorporated for motor-temperature monitoring.
Configured to the application
Available Options
Feedback
Hall sensors, digital or SinCos encoders, absolute encoders and resolver feedback.
Environmental protection
IP54 or IP65 configurations selected around the application and sealing requirement.
Brake and transmission
Holding brakes, matched gearheads and application-specific output arrangements.
Drive and customisation
Matched electronic drivers plus special mechanical, electrical and winding designs to customer specification.
Protection, cooling, insulation, balancing and thermal-protection arrangements are confirmed against the selected motor configuration and operating duty. Special designs can be developed to customer specification.
Part of the Brushless DC motor range
Matched BL Series Controllers
Compact two-quadrant controllers matched to Hall-sensor BL Series motors for dependable speed control, straightforward wiring and coordinated motor-and-controller supply.
- Matched speed controlTwo-quadrant PWM control configured with the Hall-sensor BL Series motor.
- Practical integrationFlexible speed reference, direction and enable inputs support the equipment interface.
- Coordinated supplyMotor and controller can be selected and tested as one system.
Controller capabilities
BL Series Controller Features and Selection
Review the available control functions and confirm the controller against the motor, supply and operating duty.
Two-quadrant speed control
Electronic speed control for Hall-sensor brushless motors, with efficient PWM output-stage operation.
Flexible speed reference
Set speed from the internal potentiometer, an external potentiometer or an external voltage reference.
Direction, enable and brake inputs
Dedicated inputs support direction selection, output-stage enable or disable, and controlled braking.
Adjustable current limit
Maximum continuous current can be set using the controller's on-board potentiometer.
Thermal protection
An internal thermal cut-out protects the controller against excessive operating temperature.
Industrial operating range
Specified for -10 to 45 °C operation and -40 to 85 °C storage.
System benefits
- Compact package for space-constrained equipment
- Motor and matched controller available from one supplier
- Complete motor-and-controller system testing
- Generous terminal blocks for straightforward wiring
Selection note: Controller voltage and current rating are matched to the selected motor, winding, operating point and duty cycle. Confirm the final combination with SDT before production release.
Motor and electronics as one system
BLDC Motors with Integrated Controller
Eight individual frame sizes—24, 40, 50, 60, 80, 90, 110 and 140 mm—provide engineering starting points for configured motor-and-control solutions. Frame diameter defines the platform; final torque, speed, voltage, power and controller configuration are confirmed around the equipment duty.
- Motor only, matched controller or fully integrated supply
- Speed, torque or position-control architectures
- Application-specific technical data released after requirement review
Extended high-performance range
Servo and Coreless Motor Platforms
Explore additional brushless platforms for precision servo control and high-dynamic coreless applications.
Reliable electronically commutated motion
Main Applications
Robotics & automation
Medical equipment
Pumps & air movement
Packaging machinery
Material handling
Positioning systems
Mobility equipment
Industrial equipment
Standard, modified or new
Select the Lowest-Risk Engineering Route
SDT starts with an established BLDC platform where it credibly meets the duty, then considers a controlled modification or an application-specific motor-and-drive development when the complete requirement demands it.
Learn MoreDefine the appropriate BLDC solution
Share Your Application Requirements
Provide the input voltage, performance needs, envelope, feedback, operating environment and duty cycle.