750Pcs 15-Value 2N2222-S9018 NPN PNP Bipolar Transistor TO-92 Assortment Kit

Obviously it's difficult to verify that all of the transistors in this assortment are genuine good quality components, but I have taken some steps to verify them.First of all a couple of them are identical to similar parts I've previously ordered from a reputable supplier (i.e. the markings and case are identical). Secondly, I have tested several of them in a component tester and confirmed that the pinout matches the datasheet. I believe these are all genuine parts.I think this is a very good assortment of BJT transistors, containing both NPN and PNP transistors. A lot of the included parts are very commonly used, and between them you should have no problem prototyping circuits that need small through hole transistors. It's very handy having them in a case that easily fits into a draw, with all of the compartments labelled.

Transistors! Lots of them. Always useful to have a selection on hand and most of these part numbers aren’t familiar to me so could prove interesting.I used a Peak Electronics Atlas DCA75 Pro semiconductor analyser to test a selection of the transistors. I only bothered noting the hfe reading and was pleasantly surprised at how close the readings for each component were; approximately 5 to 10% variation across 5 readings for 4 different components. Datasheets show a huge variation in allowable gain readings so to get such close variation bodes well.

These BJTs are packaged in a nice small compartmentalised box. The ones that I have tried, as of yet, seem to be okay.

E' una confezione molto ricca con svariate tipologie di transistor di impiego generale. Per ogni tipo ci sono ben 50 pezzi che coprono la maggior parte delle esigenze "d'emergenza" e di sperimentazione. La confezione è decente ma un po' delicata (tende facilmente a spaccarsi) e qualche transitor è un po' datato (ma forse è meglio in caso di ricambi non facimente disponibili).

ほとんど海外製ですが、コンプリメンタリでトランジスタが、この値段で沢山入っています。音声増幅や発振に使おうと思います。