The 2N5551 TO-92 NPN High Voltage Transistor 160V 0.6A. NPN high-voltage transistor in a TO-92; SOT54 plastic package. PNP complements: 2N5400 and 2N5401.
It is a small built-in vibration motor Module. After input 5V current, you can control the ON / OFF or vibration intensity of the motor By digital signal or PWM signal.