Description: Transistor is a basic semiconductor device that control current, which can also be used as a non-contact switch. It is very important in electronic circuit. Features: Made from silicon material, a semiconductor device that control current. It is one of the basic components of semiconductor. Can amplify current, is the core part of electronic circuit, also be used as a non-contact switch. Well packed and assorted in a compact storage case. Total 600pcs transistors in 15 types can meet you basic daily needs. Specifications: Material: Silicon Type: 15 types Quantity: 600pcs Weight: 154g(approx.) Content: Items Type Voltage Current(mA) Quantity 2N2222 NPN 40 600 40 2N3904 NPN 40 200 40 2N3906 PNP 40 200 40 2N5401 PNP 150 600 40 2N5551 NPN 160 600 40 A1015 PNP 50 150 40 C1815 NPN 50 150 40 C945 NPN 50 150 40 S8050 NPN 40 500 40 S8550 PNP 40 500 40 S9012 PNP 40 500 40 S9013 PNP 40 500 40 S9014 NPN 50 100 40 S9015 PNP 50 1000 40 S9018 NPN 30 50 40 Package Includes: 1 Box(600pcs) x Transistors