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What are the differences between soldering of chip inductors and soldering of plug-in inductors?
Sep 09, 2018

What are the differences between soldering of chip inductors and soldering of plug-in inductors?

Patch inductors often require manual soldering when servicing electronics or making small batches of samples. What do you need to pay attention to when soldering inductors by hand? What are the differences between soldering of chip inductors and soldering of plug-in inductors (such as I-inductors)?

  1. The difference between soldering with plug-in inductors.

  a, welding material: solder wire is finer, generally use active solder wire with a diameter of 0.5 ~ 0.8mm, you can also use solder paste; use a non-cleaning flux with little corrosive, no residue.

  b. Tools and equipment: use a smaller special tweezers and electric soldering iron. The power of the soldering iron is not more than 20W. The head of the soldering iron is tapered. If the requirements are increased, it is best to have a hot air workbench, SMT repair station and Special tooling.

  c. Operators are required to be proficient in SMT testing and welding skills and to accumulate certain work experience.

  2, soldering iron temperature setting

  a. When soldering and removing resistors, capacitors, inductors, components, and chips below 5*5mm and less than 8 pins, the temperature of the soldering iron is generally set to 250 to 270 °C.

  b. When the other inductors are not specially required, the soldering temperature is set to 350~370°C. See the optimum soldering temperature of the inductor.

  3. Welding precautions for chip inductors:

  a. Before applying the patch, you need to apply flux and solder paste on the soldering part of the printed circuit board.

  b. Use a manual patch tool to paste the discharge. Manual patch tools include: stainless steel tweezers, suction pens, 3 to 5 times desktop magnifier or 5 to 20 times stereo microscope, anti-static workbench, anti-static wrist strap.

  c. Ensure that the pads are clean and there will be residual solder on the reworked PCB. Electric soldering irons, tinning wires, and soldering tins are generally used. If conditions permit, the residual solder can be blown using a hot air table, and then the solder is sucked away by a vacuum suction pump. What should I pay attention to when soldering the chip inductor?

  Hand soldered chip inductors, also known as manual patches, are a way to assist with machine patches. When the machine is not suitable for the patch, the patch work can be carried out smoothly. Manual patching requires higher soldering than plug-ins and requires a skilled level of work.

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