Introduction to BC559 PNP Transistor

Hello, friends welcome to the new tutorial. In this post, we will discuss BC559 General Purpose PNP Transistor. The transistor is an electronic component that has three main pinouts base, emitter, and collector. It is created with a combination of N and P-type of materials. It has main two types according to creation the first one is PNP and the second one is NPN.

Both have their feature and applications according to use and structure. Here we discuss the BC559 transistor with details of its working and other parameters. So let’s get started

Introduction to BC559 PNP Transistor

• The BC559 transistors are PNP transistors. There are two types of BJT transistors NPN and PNP. BC559 is part of the PNP transistors series.

• There are different application configurations of transistors such as switches and amplifiers. If it is used for amplification its gain value is the main factor that must be checked before connecting to the circuit.
• The value of collector-emitter voltage for this transistor is about -30 volts, VCBO is -30V, and the Emitter−Base Voltage is -5V.
• These transistors come with a high value of gain bandwidth so used for high-frequency applications.
• In a biased state it has a high current value of -100mA about CE junction and in this condition called the saturation state.
• If there is no base current at the transistor it will work at the cut-off region and the base emitter voltage for this transistor is about -660 mV.

BC559 Pinout 

• Collector: This pin collected electrode released by the emitter.
• Base: It works like a tap and controls the biasing of the transistor.
• Emitter: Electrons released  from the emitter into the first PN junction

 

BC559 Features

• It is the main part of switching and amplifier circuits.
• VCEO value is about -65V.
• It has less noise as compared to other BC transistor series such as BC556, BC559
• It does not have lead in its structure.
• Its available packages are TO-92 Package
• Power Dissipation at 25°C value is 500.0 mW
• hFE min/max Ic Cont value is 110/800
• vC  is 30.0 V
• Ic value is 100.0 mA

BC559 Equivalent

How Transistor Works?

• BC449 transistors is a PNP transistor and the PNP transistor is made with doping of N materials with a sandwich-like configuration of Two P types.
• PNP transistors have holes in the majority carrier, so holes released by collectors are regulated through the emitter.
• The difference between PNP and NPN is that NPN has electrons as majority carriers and PNP has holes. So in PNP, transistor electrons flow from emitter to collectors so it turns on if there is zero or low current at the base.
• NPN starts operating when a high signal is given.

BC559 Applications

• It used  for the creation of audio circuits
• The amplifier circuit also uses this transistor
• It is used for relay driver, LED driver
• It is also part of  Audio amplifiers, signal Amplifiers,
• Darlington pair also uses this transistor

Technical Specifications

Type Designator	BC559
(Pc)	0.3 W
Maximum  |Vcb|	30 V
Maximum  |Vce|	25 V
Maximum  |Veb|	5 V
Maximum |Ic max|:	0.2