These are standard To-92 NPN 2N2222A transistors for general purposes.This is a good general-purpose transformer for switching.Very good to prototyping using boards on microcontroller. Note:The "****" in model number "2N2222A****" only represents the product serial number, has nothing to do with product performance.With the flat face of transistor toward you with pins down, the terminals are as follows from left to right: Emitter, Base, Collector. This should be true for all transistors in the TO-92 case. Parameter:Type : NPNModel : 2N2222APackage type : TO-92VCBO: 60VVCEO: 30VIC: 0.6APC: 625mWBlack Body Size: 4.5mm x 3mm x 4.5mmPin Diameter: 0.4mm Package Content:25 x NPN Transistors.
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