1.Provide winding space for the copper wires in the transformer.

2. Secure the magnetic core inside the transformer.

3. The wire slots in the frame offer pathways for wires during transformer winding production.

4. The metal pins in the frame serve as posts for winding the transformer's copper wire; after soldering, they connect to the PCB and conduct electricity during transformer operation.

5. The retaining walls at the bottom of the frame help fix the transformer to the PCB, provide spacing between solder piles and the PCB, as well as between the magnetic core and the PCB, and isolate the magnetic core from the solder piles to prevent poor voltage resistance.

6. The protrusions, recesses, or chamfers in the frame can determine the placement orientation or pin sequence of the transformer during use.

Transformer Frame - Classification

The transformer frame is generally classified according to the type of magnetic core (or iron core) used in the transformer, such as EI, EE, EF, EPC, ER, RM, PQ, UU, and other types. Each type can further be distinguished by the size of the magnetic core (or iron core), for example, EE5, EE8, EE13, EE19, and other models of different sizes. Frames can be categorized by shape into vertical and horizontal types; based on the transformer's operating frequency, they can be classified into high-frequency frames and low-frequency frames. Here, the frequency does not refer to the number of times it is used, but to the number of periodic changes during the transformer's operation, with the unit being Hertz (Hz), commonly abbreviated as Hz, and often expressed in kilohertz (kHz), megahertz (MHz), or GHz. According to the use of frame pins, frames are further divided into traditional frames (DIP) and surface-mount frames (SMD).