BC559 PNP Transistor

• The BC559 transistor is a general-purpose PNP transistor. This transistor also comes with many different versions, if you are using this transistor as an amplifier make sure you check the gain of the transistor from the datasheet that can be found below. The Collector−Emitter Voltage(VCEO) of this device is -30V, the Collector−Base Voltage(VCBO) is -30V, and the Emitter−Base Voltage(VEBO) is -5V. Moreover, this device has a continuous collector current of -100Madc and can operate with 150°C. Additionally, the gain-bandwidth product of this transistor is very high so it can be used in many high-frequency applications. When this transistor is in a biased condition, it can allow a maximum current of -100mA across CE(Collector-Emitter) Junction, this state of the transistor is called the saturation state, and driving a load that consumes more current than -100mA may damage the device in this condition. As you already may know, a transistor is a current-controlled device so when the base current is removed the transistor becomes fully off, in this stage the transistor is working in its Cut-off Region and the Base Emitter voltage could be around -660 mV.
• Equivalents BC558, S8550, A1015, BC557, 2N3906, 2N2907, 2N5401, BC556
• NPN Complementary of BC559 is BC549

Applications

• Build simple audio circuits
• General-purpose amplifier
• Driver Modules like Relay Driver, LED driver, etc.
• Amplifier modules like Audio amplifiers, signal Amplifiers, etc.
• Darlington pair