SMD transistors, marking, decoding. Codes: FA...MER

Marking of SMD transistors

An article for determining the type of transistor by the designation on the case, as well as its conventional analogue.

R2 SMD MARKING

Table with encoding options for SMD radio components using the first two R2 characters. Sometimes there are radio components with the same code, then you need to look at the type of housing and choose the appropriate one. Here is a brief reference table for deciphering the technical characteristics of different op-amp microcircuits, diodes, supervisors, inverters, field-effect and bipolar transistors and other SMD parts; for more details, see the parameters in the PDF datasheets through the site search. Of course, new radio elements are constantly appearing, especially from Chinese manufacturers, so the directory will be updated. Main code table

When deciphering codes, keep in mind that the characters “O” and “0” (zero and round letter) are considered the same. And in this material you can see all types, photographs and sizes of SMD component housings

• SM SMD MARKING
• VI SMD MARKING
• VJ SMD MARKING
• VK SMD MARKING

SMD transistors, marking, decoding. Codes: FA...MER

Large base for bipolar transistors in SMD version

To search, use the combination Ctrl+F.
The transistor code column shows the code marking options for this element. A group of 2-5 codes that differ by one symbol at the end of the code may belong to the same type of transistor; the difference in the codes is implied by the difference in the Current Transfer Ratio parameter in the OE circuit.

Codes: FA...MER

Codes: * 2 … BER * BER … FA * FA … MER * MER … TT * TY … ZY *

Types of recording

Transistor manufacturers use two main types of encryption: color coding and code marking. However, neither one nor the other has uniform standards. Each plant that produces semiconductor devices (transistors, diodes, zener diodes, etc.) adopts its own code and color designations. You can find transistors of the same group and type, manufactured by different factories, and they will be labeled differently. Or vice versa: the elements will be different, but the designations on them will be identical. In such cases, they can be distinguished only by additional characteristics. For example, by the length of the emitter and collector leads or by the color of the opposite (or end) surface. The markings of field-effect transistors are no different from the marks on other devices. The situation is the same with foreign-made semiconductor elements: each manufacturer uses its own types of designations.