![]() Having industry standard numbering schemes for semiconductor devices has many advantages, not only for large scale manufacturers of electronic equipment right down to the hobbyist and student.Įven though there are standard numbering systems these days, there are many specialised transistors and other semiconductor devices on the market, and these often carry the makers individual part numbers on them. Initially manufacturers had to give their own numbers to devices, but soon standard part numbering schemes were used for semiconductor devices including diodes, bipolar transistors and FETs - both JFETs and MOSFETs. BC547 transistor - BC in the part number indicates it is a silicon audio frequency low power transistor These semiconductor devices have different characteristics according to the way they are designed and made.Īs a result it is essential that the different semiconductor devices are given different part numbers to distinguish them from each other. There are many thousands of different types of diode, bipolar transistor and FET. Transistor basics Gain: Hfe, hfe & Beta Transistor specifications Transistor and diode numbering codes Choosing replacement transistors Transistor & Diode Part Numbering Codes Pro-Electron, JEDEC & JIS are industry schemes for numbering semiconductor devices: diodes, bipolar transistors & FETs - they enable sourcing of devices from different manufacturers. ![]()
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