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TPH Assembly: Power, Durability, and Compatibility in PCBs.
PCB TPH Assembly: What You Need to Know
PCB TPH assembly, also known as plated through-hole assembly, is a method of attaching electronic components to a printed circuit board (PCB) using holes drilled through the board and soldering them to pads on the opposite side. This method is widely used for PCBs that require high reliability, durability, and mechanical strength, such as in aerospace, automotive, and military applications.
The PCB TPH assembly process consists of several steps, which are briefly described below:
• Drilling: The PCB is drilled with holes according to the design specifications. The holes are usually coated with copper to create electrical connections between the layers of the board.
• Component insertion: The electronic components are inserted into the holes of the PCB, either manually or by using automated machines. The components have leads or pins that extend through the holes and protrude on the other side of the board.
• Soldering: The soldering process involves applying molten solder to the component leads and pads on the PCB, creating a strong and permanent bond. The soldering can be done by hand or by using wave soldering or selective soldering machines.
• Cleaning: The PCB is cleaned to remove any excess solder, flux, or contaminants that may affect its performance or appearance. The cleaning can be done by using water, solvents, or ultrasonic methods.
• Testing: The PCB is tested to ensure that it meets the functional and quality requirements. The testing can include visual inspection, electrical testing, or functional testing.
PCB TPH assembly has many advantages over other methods of PCB assembly, such as surface mount technology (SMT) or press-fit technology. Some of these advantages are:
• Higher component density: PCB TPH assembly can accommodate more components per unit area than SMT, as it uses both sides of the board.
• Higher power handling: PCB TPH assembly can handle higher currents and voltages than SMT, as it has thicker copper traces and larger pads.
• Higher durability: PCB TPH assembly can withstand harsh environments, vibrations, and thermal stress better than SMT, as it has stronger mechanical connections and more robust components.
• Higher compatibility: PCB TPH assembly can use a wider range of components than SMT, as it can accommodate components with different shapes, sizes, and pin configurations.
However, PCB TPH assembly also has some disadvantages compared to other methods of PCB assembly, such as:
• Higher cost: PCB TPH assembly is more expensive than SMT, as it requires more materials, labor, and equipment.
• Lower speed: PCB TPH assembly is slower than SMT, as it involves more steps and manual operations.
• Lower precision: PCB TPH assembly is less precise than SMT, as it has more chances of errors and defects.
Therefore, PCB TPH assembly is a suitable choice for PCBs that require high reliability, durability, and power handling, but not for PCBs that require low cost, high speed, and high precision.
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