This range of CBB21 metallized polypropylene film capacitors is specifically engineered for high-reliability use in fan control boards and motor drive circuits. These non-inductive capacitors offer excellent self-healing properties and high moisture resistance, making them ideal for the precise voltage regulation required in domestic and industrial ventilation systems.
The characteristic brown epoxy resin coating provides superior insulation and protection against environmental factors.
Precision Capacitance Management: Designed to provide stable starting torque and consistent running speeds for fan motors.
Enhanced Thermal Stability: Built to withstand a wide range of operating temperatures without significant capacitance drift.
Low Dissipation Factor: Minimizes internal heat generation, extending the lifespan of both the capacitor and the control board.
PCB Through-Hole Mounting: Features flexible, solderable lead wires for secure and easy installation on printed circuit boards.
Self-Healing Technology: The internal film construction can recover from minor voltage surges, preventing total component failure.
Type: CBB21 (Metallized Polypropylene Film).
Dielectric: Polypropylene film.
Coating: Flame-retardant epoxy resin (Brown).
Mounting Type: Radial Leads for PCB.
Standard Tolerance: ±5% or ±10%.
| Capacitance Value | Voltage Rating | Typical Use Case |
| 1.8 uF | 500V AC | High-voltage fan motors and industrial control boards. |
| 2.4 uF | 250V AC | Standard domestic ceiling and floor fan regulation. |
| 5.0 uF | 250V AC | High-torque startup for larger household ventilation units. |
Ceiling & Table Fans: Used for speed control and motor starting in various household fans.
Exhaust Systems: Ideal for kitchen and bathroom ventilation control boards.
Power Supply Circuits: Used for decoupling and interference suppression in electronic ballasts.
Appliance Repair: Essential replacement parts for flickering or slow-starting fans.
Why is the voltage rating important? The voltage rating (e.g., 500V or 250V) must be equal to or higher than the peak voltage of your system. Using a capacitor with a lower voltage rating than required can lead to immediate failure or safety hazards.
Can I use a 2.4uF capacitor to replace a 2uF unit? It is generally recommended to stay as close as possible to the original manufacturer's capacitance value. A higher value (like 2.4uF) may increase motor speed but can also cause the motor to run hotter, potentially shortening its lifespan.
My fan is humming but not turning. Is this the right part? A humming motor that won't spin is a classic sign of a failed start/run capacitor. Replacing the old capacitor with a matching CBB21 series unit often restores full function.
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