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Choose your motor by power, speed, frame size and mounting.
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Selecting the correct single phase motor is all about matching performance to your application.
Full technical datasheets available for each unit
Ideal for applications that require a high starting torque (1.8–2.5 times the full load torque).
High starting torque for compressors, conveyors, woodworking machinery, and gearboxes.
Ideal for applications that require a low starting torque (0.3–0.7 times the full load torque).
Ideal for fans, blowers, air handling, pumps and low starting load ventilation units.
Safe for construction sites and portable equipment where an 110V supply is mandatory.
For site and workshop use. Certified portable equipment safety compliance for site machinery.
A single phase electric motor operates on a single alternating current (AC) waveform, making it ideal for applications where a standard UK 230V domestic or light industrial power supply is available. Unlike three phase motors which require a three-phase supply (typically 400V), single phase motors connect directly to a standard 13A socket or dedicated single phase circuit.
Single phase motors are the practical choice for workshops, small businesses, farms, and domestic applications where three phase power isn't available or cost-effective to install. They power everything from compressors and car lifts to pumps, fans, and woodworking machinery such as lathes, pillar drives and circular saws.
At MM Engineering, we stock a comprehensive range of single phase motors from 0.09kW (0.12hp) to 3.7kW (5hp) in both 230V and 110V configurations. Our motors are to the new IE2 high efficiency, have metal terminal boxes to house the capacitors, manufactured to IEC standards, and supplied with a 12-month warranty. One additional benefit our motors have over others is they have a built in thermal protection system. With same day despatch, FREE next day delivery on UK mainland orders and expert technical support, we make buying the right single phase motor simple.
Choosing the right type of single phase motor depends on your starting torque requirements and application.
Capacitor start/capacitor run motors (also called CSCR or two-value capacitor motors) are designed with two capacitors, which allow them to deliver the highest starting torque of any single phase motor type - typically 1.8-2.5 times the rated torque. This makes them essential for applications with high inertia loads or where the motor must start under load e.g. Car Lift, Compressors or Conveyor.
- How They Work These motors use two capacitors: a large start capacitor and a smaller run capacitor. At startup, both capacitors are in circuit to create a strong phase shift that produces high starting torque. Once the motor reaches approximately 75% of full speed, a centrifugal switch disconnects the start capacitor, leaving only the run capacitor in circuit for efficient continuous operation.
- Ideal Applications
- Our Range We stock capacitor start/capacitor run motors from 0.18kW (0.25hp) to 3.7kW (5hp) in 2-pole (3000rpm) and 4-pole (1500rpm) configurations. All motors feature high-quality aluminium construction, NSK bearings, IE2 design, complete with Thermal reset switches for added protection and multi-mount design.
Permanent capacitor motors (also called capacitor run or PSC motors) offer reliable, maintenance-free operation for applications requiring low starting torque. With no centrifugal switch to wear out and only one single capacitor, these motors are simpler, quieter, and longer-lasting than capacitor start/run types allowing you to switch them more on/off frequently.
-How They Work A single capacitor remains permanently connected in the motor start winding, providing continuous phase shift. This eliminates the mechanical complexity of a centrifugal switch but limits starting torque to approximately 0.3-0.7 times the rated torque. Once running, permanent capacitor motors are reliable but less efficient than other AC Electric motors.
- Ideal Applications
-Our Range: We stock permanent capacitor motors from 0.09kW (0.12hp) to 3.0kW (4hp). These motors are perfect for applications where the load starts unloaded (like pumps and fans) and smooth, quiet operation is important.
Our single phase motors are available in various speeds, ranging from 1000RPM to 3000RPM, covering virtually all domestic, commercial and light industrial applications.
Single phase motors are available in three standard speeds:
Our single phase motors are available in various powers, ranging from 0.09kW (0.12hp) to 3.7kW (5hp), covering virtually all domestic, commercial and light industrial applications.
Electric motors come in various frame sizes which determines the physical dimensions of the motor, including the mounting hole positions, shaft height, shaft diameter, length and keyway details. It is essential to match the frame size when replacing an existing motor.
All our single phase motors feature multi-mount design with removable feet, allowing flexible installation. Standard mounting options include:
The most common configuration, where the feet are bolted to a base/mounting plate.
Large flange for mounting direct to equipment. No feet required.
Smaller face flange for compact installation with drilled and tapped holes.
Larger face flange for compact installation with drilled and tapped holes.
A combination of a foot mount and a small face mount for a secure fit with maximum flexibility.
A combination of a foot mount and a large face mount for a secure fit with maximum flexibility.
Combination mounting with large flange providing both stability on the ground and a direct flange coupling to the driven equipment.
Large flange for direct mounting in a vertical position to equipment. No feet required with added protective rain canopy that shields the top of the motor from water ingress, dirt, and debris.
Single phase motors have a terminal box with clearly marked connections. Typically: L (Live), N (Neutral), and E (Earth). The capacitor(s) are usually internally wired. Below is our typical wiring diagrams for a Capacitor Start/Capacitor Run and Permanent Capacitor motor and shows the how to wire the motor for clockwise and anti-clockwise rotation.
Single phase motors power equipment across numerous industries and applications:
• Table saws and band saws • Planers and thicknessers
• Dust extraction • Pillar drills • Lathes
HVAC & Ventilation • Extractor fans • Air handling units
• Borehole pumps • Pressure boosters • Swimming pool pumps
• Pond pumps • Heating circulation pumps
Selecting the right single phase motor for your application requires matching several key specifications:
Electric motors come in various frame sizes which determines the physical dimensions of the motor, including the mounting hole positions, shaft height, shaft diameter, length and keyway details. It is essential to match the frame size when replacing an existing motor.
See below the actual difference between a 2.2kW single phase motor vs a 2.2kW three phase motor
A single phase motor operates from a standard 230V single phase mains power supply.
Single phase motors are commonly used in small pumps, fans, compressors, conveyors, car lifts, and workshop machinery such as pillar drills, circular saws, and bandsaws.
We typically supply single phase motors ranging from 0.09kW up to approximately 3.7kW.
Capacitor Start / Capacitor Run motors provide high starting torque, typically between 1.8 to 2.5 times the rated torque.
Permanent Capacitor motors offer lower starting torque, generally between 0.3 to 0.7 times the rated torque.
Yes, for lower power applications (typically under 3kW), a single phase motor can replace a three phase motor when matched correctly for kW, torque, speed, and frame size.
Common motor speeds are:
Most of our single phase motors are 230V as standard. Please contact us if you require a 110V or dual-voltage option.
Yes, provided the motor is correctly sized and rated for S1 continuous duty operation.
No, we generally do not recommend using a speed controller with a standard single phase motor.
Yes, we supply foot mounted, flange mounted, and face mounted single phase motors in common frame sizes. We also offer special B5R and B14L face plates. In addition, our workshop can manufacture custom mounting plates to suit specific requirements.
