In some cases, the CBB capacitor behind the rectifier bridge can be replaced with a box capacitor, but there are some factors to consider.
CBB capacitors (polypropylene capacitors) typically have higher frequency characteristics and lower equivalent series resistance (ESR), making them suitable for filtering and decoupling applications at high frequencies. The box capacitor usually has a large capacitance and high voltage tolerance, which is suitable for low-frequency filtering and energy storage applications.
If you plan to replace the CBB capacitor with a box capacitor, you need to ensure the following:
Voltage level: The voltage level of the box capacitor should be able to meet the voltage requirements behind the rectifier bridge to ensure safe operation.
Capacity: The capacity of the cartridge capacitor should be equal to or higher than the original CBB capacitor to ensure that filtering requirements are met.
Frequency response: If the original circuit has requirements for frequency response, it is necessary to ensure that the frequency characteristics of the box capacitor can meet the requirements.
Size and installation: Box capacitors are generally larger than CBB capacitors and need to ensure that there is enough space to install and consider the replacement circuit layout.
It is important to note that different types of capacitors have different characteristics, so care needs to be considered when replacing capacitors. It is best to refer to the circuit design specifications and relevant data manuals, or consult a professional electronics engineer to ensure that the replaced capacitor can meet the requirements of the circuit.
Hope the above can help you! If you have any other questions, please feel free to follow up.