5 µF Round Run Capacitor – 370 VAC / 440 VAC / 450 VAC

Reliable Motor Run Capacitor for Home & Hobby Electronics

This 5 µF (5 MFD) round run capacitor is an excellent choice for DIYers, hobbyists, and light industrial users looking for a dependable capacitor that delivers quiet, efficient performance. Ideal for single-phase motors, fans, blowers, air-conditioning units, and general electronics applications, this capacitor makes replacement easy — and dependable.

Why Choose This Round Run Capacitor?

With a rated voltage of 370 VAC, 440 VAC and up to 450 VAC, this unit offers true run capacitor performance — suitable for continuous duty in fan motors, HVAC blowers and assorted electronics projects. Typical specifications include a capacitance tolerance around ±5–6% and continuous operation in environments from -40 °C up to +70 °C (-40 °F to +158 °F). Sources show the size to be about 40 mm diameter x 55 mm height. 

Key Features at a Glance

• Capacitance: 5 µF (5 MFD)
• Voltage Rating: 370 VAC / 440 VAC / 450 VAC (50 / 60 Hz) 
• Tolerance: Typically ±5% to ±6% (varies by specification)
• Operating Temperature: -40 °C to +70 °C (-40 °F to +158 °F) 
• Construction: Metallized polypropylene film dielectric, epoxy-filled aluminium can (typical for CBB65 style)
• Size dimensions: Approx. 40 mm diameter × 55 mm height for this particular round variant.

Consumer-Friendly Benefits

If you’re repairing a ceiling fan, a small air-conditioner, a pool pump, or a DIY electronics enclosure, this 5 µF round capacitor brings you several key benefits:

• Plug-and-play simplicity – Compatible with many motors that require a 5 MFD run capacitor.
• High-voltage tolerance – 370/440/450 VAC ratings mean it can handle most household 50/60 Hz systems without stress.
• Compact size – The roughly 40 mm × 55 mm can fits nicely into tight enclosures or retrofit spaces.
• Long life – Film-dielectric construction means better longevity, less leakage and better stability than cheaper electrolytic types.

Application Tips & Best Practices

For best results:

• Ensure replacement matches the original capacitor’s µF (5 µF) and voltage rating (ideally equal or higher).
• Always discharge the capacitor before handling – film capacitors can retain charge even when disconnected.
• Wire into the motor circuit following standard safety guidelines (shutdown power, secure connections, confirm polarity if required, etc.).
• Check that the ambient temperature remains within the rated range (-40 °C to +70 °C) for reliable long-term performance.

Why Vetco Electronics Recommends This Capacitor

At Vetco Electronics, we carry a wide range of high-quality motor capacitors for hobby-, maker- and light-industrial-scale applications. This 5 µF round run capacitor combines proven specification with affordability, making it a smart choice whether you’re repairing equipment or building a custom project. If you’re checking compatibility, mounting space or need OEM equivalents, our tech team is here to help.

Browse our full collection of motor run capacitors, film capacitors and electronics parts to find the right fit for your application.