2N4401_D11Z

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Transistor Type:	NPN
Current - Collector (Ic) (Max):	600mA
Voltage - Collector Emitter Breakdown (Max):	40V
Vce Saturation (Max) @ Ib, Ic:	750mV @ 50mA, 500mA
Current - Collector Cutoff (Max):	--
DC Current Gain (hFE) (Min) @ Ic, Vce:	100 @ 150mA, 1V
Power - Max:	625mW
Frequency - Transition:	250MHz
Operating Temperature:	-55°C ~ 150°C (TJ)
Mounting Type:	Through Hole
Package / Case:	TO-226-3, TO-92-3 (TO-226AA) (Formed Leads)
Supplier Device Package:	TO-92-3
Base Part Number:	2N4401

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Introduction

2N4401_D11Z is a common NPN switching transistor with a wide variety of application fields and working principles. It is an active device that acts as a switch and can be ideal for systems with low noise and nanosecond time response requirements.

Application Field

2N4401_D11Z transistors can be used in a wide variety of applications, including automation, computer peripherals, consumer electronics, robotics, integrated circuits, circuit protection and many other industrial applications. As a switching transistor, 2N4401_D11Z can be used to create relays, circuit breakers and other electrically-controlled devices. It can also be used as a amplifier, to reinforce the strength of small signals, or as a current regulator.

Working principle

2N4401_D11Z transistors behave like a two-terminal switch and are sensitive to the current flow across their base-emitter junction. When the base-emitter voltage is applied, current flows from the Emitter to the Base, and this switches on the transistor which in turn affects transistors current gain or “Beta” value. The Base-Emitter junction acts as a voltage controlled resistor, with lower voltage causing a higher gain and greater current, and higher voltage causing the current to drop. Furthermore, the Base-Collector junction behaves as a current controlled resistor, with greater current causing a lower level of gain and lower current resulting in higher gain. In other words, the 2N4401_D11Z acts like a relay, where an electrical signal applied to the Base controls the current flowing through the other two terminals (Emitter/Collector). This makes the 2N4401_D11Z an ideal switch for low-noise, high response systems.

Conclusion

2N4401_D11Z transistors are a popular choice for a variety of applications due to their wide range of application fields and working principles. They are capable of switching current on and off quickly and are used to create relays, circuit breakers and other electrically-controlled devices. The internal circuit of the 2N4401_D11Z allows it to act as an amplifier or a current regulator, making it an ideal choice for systems with low noise and nanosecond time response requirements.

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