TIP120 Darlington transistors comes in handy whenever little NPN transistors are insufficient to power your project.Great for whenever you need to control medium to high-power electronics such as motors, solenoids, or 1W+ LEDs. TIP120 is a general purpose amplifier and has a BCE pinout.
They can switch up to 60V at peak currents of 8A (not continuously, just peak!) and continuous current of 5A, with a DC gain of about 1000.