Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Transistor Type:	PNP
Current - Collector (Ic) (Max):	1A
Voltage - Collector Emitter Breakdown (Max):	300V
Vce Saturation (Max) @ Ib, Ic:	200mV @ 300mA, 1A
Current - Collector Cutoff (Max):	50nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce:	100 @ 500mA, 10V
Power - Max:	1.2W
Frequency - Transition:	85MHz
Operating Temperature:	-55°C ~ 200°C (TJ)
Mounting Type:	Through Hole
Package / Case:	E-Line-3, Formed Leads
Supplier Device Package:	E-Line (TO-92 compatible)
Base Part Number:	ZTX957

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ZTX957STOA application field and working principle

Introduction

The ZTX957STOA is a single bipolar transistor, meaning that it uses two PNP transistors operating in opposite directions. It is a utility transistor, meaning that it has no particular application, but it can be used in many different ways. It is typically used in low power switching circuits, audio generator circuits, and voltage regulator circuits. In this article, we will discuss the application field and working principle of the ZTX957STOA.

Application Field

Since the ZTX957STOA is a utility transistor, it can be used in many different applications. It is usually used in low power switching circuits as a replacement for relays or even mechanical switches. It has a high input impedance and a low collector output capacitance. This makes it ideal for applications such as remote control circuits and digital logic circuits. It is also often used in audio generator circuits that make use of an audio feedback loop. It is also useful in voltage regulator circuits, providing parameters such as voltage regulation, current limit, and power supply protection.

Working Principle

The working principle of the ZTX957STOA is quite simple. It is a PNP transistor, meaning that it has two main terminals, the collector and the emitter. When there is no current flowing through the transistor, both the emitter and the collector are at the same voltage level. However, when a small current is applied to the base, the transistor switches on and the collector-emitter voltage drops. This causes a change in voltage across the transistor, allowing it to be used as a switching device.In addition to this, the ZTX957STOA also has some protective functions built in. It has a thermal shutdown feature, which turns off the transistor if it gets too hot. It also has an overvoltage protection circuit, which turns off the transistor if the collector-emitter voltage exceeds a certain level. This helps to protect the transistor from damage in the event of an overload.

Conclusion

The ZTX957STOA is a utility transistor, meaning that it has no particular application, but it can be used in many different ways. It is typically used in low power switching circuits, audio generator circuits, and voltage regulator circuits. It has a high input impedance and a low collector output capacitance. In addition, it has protective features such as thermal shutdown and overvoltage protection. With its wide range of uses and features, the ZTX957STOA is an excellent choice for many applications.

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