Polypropylene Film Capacitor, commonly referred to as CBB capacitor, is a type of capacitor that uses polypropylene film as the dielectric. Polypropylene film has good insulation performance, low dielectric loss, and high voltage resistance, making CBB capacitors perform well in high-frequency, high-power, and high-precision applications.

characteristic:

Low loss: Polypropylene film has very low dielectric loss, which makes CBB capacitors exhibit good stability in high-frequency applications.

High stability: CBB capacitors have excellent temperature stability and time stability, and the capacitance value has little drift with temperature and time.

High voltage resistance: Polypropylene film can withstand high DC and AC voltages, making it suitable for high-voltage applications.

Non polarity: CBB capacitors are non-polar capacitors that can be used in AC circuits.

Long lifespan: Due to the stability of its materials and the robustness of its structure, CBB capacitors typically have a longer service life.

Application:

Power filtering: CBB capacitors are commonly used for filtering power lines to reduce electromagnetic interference and improve power quality.

Motor start: In the motor starter, CBB capacitors are used to improve the starting performance of the motor.

Audio frequency division: In audio systems, CBB capacitors are used for frequency division networks because they can provide clear sound quality and accurate response.

RF coupling: In radio and communication equipment, CBB capacitors are used for coupling and decoupling RF signals.

Precision measurement: In measurement equipment that requires high precision and stability, CBB capacitors are the ideal choice.

Type:

CBB capacitors can be classified into various types based on their structure and manufacturing process

Metallized polypropylene film capacitor: Using metallized polypropylene film as electrode, it has self-healing ability, that is, under overvoltage conditions, the local breakdown area will evaporate, thereby restoring the insulation performance of the capacitor.

Foil type polypropylene film capacitor: Using metal foil as the electrode, it usually has higher voltage resistance and lower inductance.

Packaging and dimensions:

The packaging and size of polypropylene film capacitors (CBB capacitors) vary greatly due to their diverse applications. CBB capacitors can be packaged in different forms, including radial lead type, axial lead type, SMT type, etc. The following are some common CBB capacitor packages and sizes:

Radial Led:

This is the most common form of CBB capacitor packaging, with leads at both ends of the capacitor, suitable for manual soldering or automatic insertion. Common sizes include:

Small: Diameters range from 2mm to 10mm, and lengths range from 5mm to 20mm.

Medium size: Diameters range from 10mm to 20mm, and lengths range from 20mm to 50mm.

Large: diameter exceeding 20mm, length may exceed 50mm, suitable for high-power applications.

Axial Led:

The two leads of a capacitor are led out from the same end, which is suitable for specific installation requirements. The size is usually smaller than the radial lead type:

Small: Diameters range from 2mm to 6mm, and lengths range from 5mm to 15mm.

Medium size: Diameters range from 6mm to 12mm, and lengths range from 15mm to 30mm.

Surface Mount:

Suitable for surface mount technology (SMT), with dimensions similar to other SMT capacitors. Common dimensions include:

0402：1.0mm x 0.5mm

0603：1.6mm x 0.8mm

0805：2.0mm x 1.25mm

1206：3.2mm x 1.6mm

1210：3.2mm x 2.5mm

1808：4.5mm x 2.0mm

1812：4.5mm x 3.2mm

2220：5.6mm x 5.0mm

matters needing attention:

Size: The specific size of CBB capacitors depends on their capacitance value, voltage level, and working environment.

Voltage level: Select the appropriate voltage level based on the operating voltage of the application.

Temperature range: Consider the temperature range in which the capacitor will operate, choose appropriate materials and designs.

Environmental conditions: Select the appropriate type of capacitor based on the working environmental conditions of the equipment (such as humidity, chemical exposure, etc.).

The packaging and size of CBB capacitors may vary depending on the manufacturer and product line. When selecting CBB capacitors, reference should be made to the detailed product specifications and data sheets provided by the manufacturer to ensure that the selected capacitor meets the design requirements. Due to the wide variety of CBB capacitors, the most suitable CBB capacitor product should be selected based on specific circuit design and space limitations. When selecting CBB capacitors, factors such as capacitance value, operating voltage, frequency response, temperature range, packaging size, and cost need to be considered. Manufacturers usually provide detailed product specifications and data sheets to help users make appropriate choices. Due to the wide variety of CBB capacitors, the most suitable CBB capacitor product should be selected based on specific circuit design and space limitations.