CBB61 Fan Start Capacitor for Ceiling and Table Fans, Motor Terminal Capacitor 1uF–4.5uF 450V

CBB61 Fan Start Capacitor — 1µF–4.5µF, 450V AC, Ceiling & Table Fan Motor

CBB61 series metallised polypropylene film capacitor for single-phase AC fan motor starting and running applications, rated at 450V AC and available in capacitance values from 1µF to 4.5µF. The CBB61 is the standard motor run/start capacitor for ceiling fans, table fans, exhaust fans, and other single-phase AC induction motors requiring a capacitor to create the phase shift needed for self-starting. The polypropylene film construction provides low loss, long service life, and stable capacitance over the operating temperature range.

Technical Specifications

Parameter	Value
Series	CBB61
Dielectric	Metallised polypropylene film (MPP)
Capacitance Range	1µF / 1.5µF / 2µF / 2.5µF / 3µF / 3.5µF / 4µF / 4.5µF
Rated Voltage	450V AC (VAC)
Tolerance	±5% (J grade)
Frequency	50Hz / 60Hz
Operating Temperature	−40°C to +85°C
Terminals	Wire leads or spade terminals (check variant)
Certification	CE, RoHS, CQC

Capacitance Selection Guide

Fan Type	Typical Capacitance	Notes
Small table fan (30–40W)	1–1.5µF	Check motor nameplate for exact value
Standard ceiling fan (50–60W)	2–2.5µF	Most common ceiling fan capacitance
Large ceiling fan (70–80W)	3–4µF	High-torque or large-diameter fans
Industrial exhaust fan	3.5–4.5µF	Verify against motor nameplate

Typical Applications

• Ceiling Fan Repair: Replace a failed CBB61 capacitor on a ceiling fan that hums but does not start, or starts slowly and runs at reduced speed
• Table Fan Repair: Replace a failed start capacitor on a table fan or pedestal fan that fails to start or runs erratically
• Exhaust Fan: Motor run capacitor replacement for bathroom, kitchen, and industrial exhaust fans
• Single-Phase AC Motor: Run capacitor for single-phase capacitor-run induction motors in pumps, compressors, and HVAC equipment

Installation Notes

• Disconnect the fan from mains power before replacing the capacitor
• Discharge the old capacitor before handling (short the terminals through a 10kΩ resistor)
• Match the replacement capacitor value exactly to the original (check the motor nameplate or original capacitor label)
• The rated voltage of the replacement must be equal to or greater than the original (450V AC is standard for most fans)

FAQ

Q: How do I know if my fan capacitor has failed?
A: Common symptoms of a failed fan capacitor include: fan hums but does not start, fan starts only when given a manual push, fan runs at reduced speed, or fan runs hot. Test the capacitor with a capacitance meter — a failed capacitor will read significantly below its rated value or open circuit.

Q: Can I use a higher capacitance value than the original?
A: No. Using a higher capacitance than specified will cause the motor to overheat and may damage the motor windings. Always replace with the exact capacitance value specified on the motor nameplate.

Package Contents

• 1 × CBB61 fan start/run capacitor (capacitance value as selected, 450V AC)

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