Failure Analysis on 07639SOCN FK230003P1 26522-N45 Transformers

Gideon Analytical Laboratories received two07639SOCN FK230003P1 26522-N45 transformers for electronic failure analysis. Transformers are electrical devices typically used to transfer energy between two or more circuits using electromagnetic induction. Electromagnetic induction is the production of an electromotive force across a conductor when it is exposed to a varying magnetic field. Using Faraday’s Law with high magnetic permeability core properties, transformers can efficiently change AC voltages from one voltage level to another within a given power network. One transformer had a lower expected resistance on pins 4-6 and the other had a resistance changing when the temperature was elevated. The goal was to perform failure analysis on these transformers.

To determine the cause of the failure, several steps were undertaken. The 07639SOCN FK230003P1 26522-N45 transformers were housed in a fiberglass resin box, which was then filled with an epoxy over the polyimide coated magnet wires. The sides of the transformers were slightly bulging. The sides were removed, the wires exposed, and a variety of electrical tests were conducted. The epoxy was removed and the magnet wire was inspected, there were no defects in the epoxy nor cracks in the magnet wire. After the stripping, the probe penetrated the film very easily. Leakage across the adjacent turns is causing the resistance to decrease. The failure was the result of two possibilities: the wire coating degraded because of hydrolytic cleavage or the polyimide tape not being adequately applied over the different inductors.

Gideon Analytical Laboratories has been solving electronic problems for over two decades. We have the experience, the knowledge, and the analytical equipment to get the job done. We have helped hundreds of electronics companies solve their problems. Imagine the time and money your company can save and the embarrassment and potential lawsuits you can avoid by making sure your products work properly. From application issues to ROHS compliance to PCB analysis, Gideon Analytical Laboratories will solve your problems. From relays to resistors to diodes, Gideon Analytical Laboratories will get the job done. If you are having problems with a design, production, or in the field, call Gideon Analytical Laboratories and worry no more.