This document introduces the features and characteristics of the Three Lin Electronics switch mode power transformer, including operating frequency, power range, high efficiency, low leakage inductance, good heat dissipation, and lower electromagnetic interference. The ferrite cores include EE, EC, EI, EF, EER, ED, EFD, PQ, RM, etc. The installation can be designed according to customer requirements. It is suitable for various switch mode power, circuit forms, and applications in communication, network, computer, medical equipment, household appliances, etc.