Motor Run Capacitors
Buy high-quality motor run capacitors for pumps, compressors, air conditioning systems and more. We stock a wide range of reliable film capacitors in multiple µF ratings and voltage options, ready for fast UK delivery.
Whether you need a quick replacement or sourcing parts for repairs, our capacitors are designed for performance, durability and easy installation.
Shop Motor Run Capacitors by µF Rating
Motor Capacitor Examples
Motor Capacitor Guide
| µF Rating | Typical Use |
|---|---|
| 5µF – 10µF | Fans & small motors |
| 12µF – 25µF | Pumps & pressure washers |
| 30µF – 50µF | Compressors & HVAC systems |
| 60µF+ | Heavy-duty motors |
Voltage Guide
| Voltage | Application |
|---|---|
| 370VAC | Standard use |
| 450VAC | Heavy-duty applications |
Motor Start Capacitors
Motor start capacitors provide the initial boost required to start single-phase motors. If your motor struggles to start, the start capacitor is often the issue. These are commonly used alongside run capacitors to ensure smooth operation.
Start Capacitors vs Run Capacitors
Start capacitors deliver a high burst of energy to start motors, while run capacitors maintain performance once running. Both play a critical role in motor efficiency.
Choosing the Correct µF Rating
Always match the capacitance (µF) rating with your existing component. Using the wrong value can damage the motor or reduce efficiency.
Connection Types Explained
Common connection types include quick connect terminals, wire leads and screw fittings. Always check compatibility before installation.
Single Phase Motor Applications
These components are widely used in single phase motors found in compressors, pumps, HVAC systems and industrial equipment.
Motor Capacitor FAQs
What does a motor run capacitor do?
A motor run capacitor stores and releases electrical energy to help motors run efficiently and maintain torque.
What happens when a capacitor fails?
A failed capacitor can stop a motor from starting, cause overheating or lead to poor performance.
Use quick view, add to basket and we dispatch fast across the UK. Some items may be restricted for international shipping.