What are the packaging options for CBB capacitors?

CBB capacitors (polypropylene film capacitors) use metalized polypropylene film as the dielectric and have excellent high-frequency characteristics, low loss, and high stability. They are widely used in electronic circuits. Its packaging forms are diverse to meet the voltage, current, size, and reliability requirements of different scenarios. The packaging system of CBB capacitors is systematically analyzed from three dimensions: general packaging types, high-voltage/high-frequency specialized packaging, and brand specific packaging, combined with parameters such as size, material, and application scenarios
1、 Universal Packaging Types: Standardization and Wide Applicability
1. Surface mount packaging (SMD)
Structural features:
Rectangular or cylindrical body, with metal pads at the bottom and no leads or short leads.
Typical packaging: 0805 (2.0mm × 1.25mm), 1206 (3.2mm × 1.6mm), 1812 (4.5mm × 3.2mm).
Advantages:
Small size, suitable for high-density PCB layout.
Automated mounting has high efficiency and good consistency.
Application scenarios:
Consumer electronics (such as smartphones, TWS earphones), communication devices (such as 5G base stations).
Rated voltage: usually<100V, some high-voltage models can reach 500V.
2. Radial Leaded Packaging
Structural features:
Cylindrical body with metal leads at both ends, with fixed lead spacing (e.g. 2.54mm, 5.08mm).
Typical packaging: RD series (such as RD10, RD15).
Advantages:
Low cost, suitable for large-scale production.
Easy to manually weld and convenient to repair.
Application scenarios:
Industrial power supply, LED driver, home appliance control board.
Rated voltage: usually<500V, some high-voltage models can reach 1000V.
3. Axial Leaded Packaging
Structural features:
Cylindrical body, with leads extending axially from both ends and adjustable lead spacing.
Typical packaging: AX series (such as AX50, AX100).
Advantages:
High mechanical strength and excellent anti vibration performance.
Suitable for high-frequency circuits with low lead inductance.
Application scenarios:
Automotive electronics (such as ABS controllers), audio equipment (such as amplifiers).
Rated voltage: usually<1000V, some high-voltage models can reach 2000V.
2、 High voltage/high-frequency specialized packaging: voltage resistance and performance optimization
1. Bull horn packaging (Snap in)
Structural features:
Cylindrical body with plastic buckle at the top, and quick connect terminals for the leads.
Typical packaging: SNAP series (such as SNAP-IN 35 × 50).
Advantages:
High voltage resistance (up to 600V), suitable for high current scenarios.
Excellent heat dissipation performance and long lifespan.
Application scenarios:
Industrial power sources, new energy vehicles (such as battery management systems).
Rated voltage: usually>450V, some models can reach 600V.
2. Screw Terminal
Structural features:
Cylindrical body with threaded holes at the top, connected by bolts for fixation.
Typical packaging: BOLT series (such as BOLT 50 × 100).
Advantages:
Extremely high voltage resistance (up to 2000V), suitable for high-voltage and high-power scenarios.
The mechanical connection is reliable and has strong anti vibration performance.
Application scenarios:
Power transmission, high-voltage direct current transmission (HVDC), welding machines.
Rated voltage: usually>1000V, some models can reach 2000V.
3. Metallized polypropylene film encapsulation (MPP)
Structural features:
Made by winding metalized polypropylene film, the body is cylindrical or rectangular, and the leads are radial or axial.
Typical packaging: MPP series (such as MPP 10 × 20).
Advantages:
Excellent high-frequency characteristics (self resonant frequency>10MHz), low loss (tan δ<0.1%).
Wide temperature resistance range (-55 ℃~+105 ℃).
Application scenarios:
RF circuits, switching power supplies, audio equipment.
Rated voltage: usually<500V, some high-voltage models can reach 1000V.
3、 Brand Feature Packaging: Technological Differentiation and Scene Adaptation
1. Wima (Germany)
Featured packaging:
Audio specific packaging: adopts radial lead design, optimized lead spacing, reduces parasitic inductance, and improves audio signal purity.
Application scenarios:
High fidelity audio, professional audio equipment.
2. Nichicon (Nichicon, Japan)
Featured packaging:
High voltage CBB capacitor: packaged in cow horn, with a withstand voltage of up to 600V, suitable for industrial power supply.
Application scenarios:
Industrial automation, new energy generation.
3. Xiamen Farah Electronics (China)
Featured packaging:
Surface mounted CBB capacitor: packaged in 1206, with a withstand voltage of 500V, suitable for consumer electronics.
Application scenarios:
Smartphones, TWS earphones, tablets.
4、 Packaging selection logic: voltage, current, and spatial balance
High frequency scenario: Prioritize metalized polypropylene film packaging (MPP) or surface mount packaging, with low lead inductance and low losses.
High voltage requirement: Choose cow horn packaging or bolt packaging, with a pressure resistance of>1000V.
Space limited design: using surface mount packaging (such as 0805, 1206), with a small volume.
High current scenario: Choose horn packaging or bolt packaging for excellent heat dissipation performance.
Based on the above analysis, the packaging form of CBB capacitors needs to be comprehensively considered in combination with voltage level, current capacity, space limitations, and reliability requirements. With the advancement of materials science and manufacturing technology, the packaging of CBB capacitors will continue to develop towards miniaturization, high frequency, and high voltage resistance.