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2N4401 Description

The 2n4401 is a bipolar junction transistor with an NPN junction that is used for general purpose amplification and switching. Conduction is carried out by both charge carriers, i.e. electrons and holes, in a bipolar junction transistor. However, electrons will be the majority charge carriers.

2N4401 Features

The collector current (IC) is 500mA on a continuous basis.

The voltage between the collector and the emitter (VCE) is 40 volts.

The collector-base voltage (VCB) is set to 60 volts.

6V is the Emitter Base Breakdown Voltage (VBE).

100MHz is the transition frequency.

To-92 package is available.

General-purpose NPN Transistor

High DC Current Gain (hFE), typically 80 when IC=10mA

2N4401 Pinout

2N4401 CAD Model

 Symbol

Footprint

3D Model

2N4401 Equivalents

Part Number	Description	Manufacturer
2N4401RLRETRANSISTORS	Small Signal Bipolar Transistor, 0.6A I(C), 40V V(BR)CEO, 1-Element, NPN, Silicon, TO-92	Motorola Semiconductor Products
2N4401TFRTRANSISTORS	600mA, 40V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92, LEAD-FREE, TO-92, 3 PIN	Rochester Electronics LLC
2N4401D74ZTRANSISTORS	Small Signal Bipolar Transistor, 0.6A I(C), 40V V(BR)CEO, 1-Element, NPN, Silicon, TO-92	Fairchild Semiconductor Corporation
2N4401BUTRANSISTORS	600mA, 40V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92, LEAD FREE, TO-92, 3 PIN	Rochester Electronics LLC
2N4401TATRANSISTORS	NPN Bipolar Junction Transistor, TO-92, 2000-FNFLD	onsemi
2N4401_J05ZTRANSISTORS	Small Signal Bipolar Transistor, 0.6A I(C), 40V V(BR)CEO, 1-Element, NPN, Silicon, TO-92, LEAD FREE, TO-92, 3 PIN	Fairchild Semiconductor Corporation
2N4401RLTRANSISTORS	600mA, 40V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92, CASE 29-11, TO-226AA, 3 PIN	onsemi
2N4401RLRAGTRANSISTORS	600mA, 40V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92, LEAD FREE, CASE 29-11, TO-226AA, 3 PIN	Rochester Electronics LLC
2N4401RLRPTRANSISTORS	600mA, 40V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92, CASE 29-11, TO-226AA, 3 PIN	Rochester Electronics LLC
2N4401-APTRANSISTORS	Small Signal Bipolar Transistor, 40V V(BR)CEO, 1-Element, NPN, Silicon, TO-92, ROHS COMPLIANT, PLASTIC PACKAGE-3	Micro Commercial Components

Specifications

Package / Case: TO-226-3, TO-92-3 (TO-226AA) (Formed Leads)

Packaging: Bulk

Operating Temperature: -55°C~150°C TJ

Voltage - Collector Emitter Breakdown (Max): 40V

Transistor Type: NPN

Mounting Type: Through Hole

2N4401 Applications

1. It has the ability to switch high-current loads (up to 500mA).

2. It can be used in a wide range of switching applications.

3. Controlling the speed of the motor

4. Inverter and other rectifier circuits

5. It can be employed in Darlington Pair.

2N4401 Package

2N4401 Manufacturer

On Semiconductor (Nasdaq: ON) is a manufacturer engaging itself in reducing energy use. It features a comprehensive portfolio of power, signal management, and logic, custom solutions that are energy efficient. It acts as a world-class supply chain with high reliability and a network of manufacturing facilities, sales, offices, and design centers in key markets through North America, Europe, and the Asia Pacific regions.

2N4401 vs 2N3904

In every way, the 2N3904 and 2N4401 look to be quite similar parts. The 2N4401 has a greater current rating, but otherwise, they appear to be similar in pricing and other aspects.

2N4401 vs 2N2222

The 2N4401 transistor is extremely similar to the widely used 2N2222 NPN transistor. The 2N4401 and the 2N2222, on the other hand, have two major variances. When compared to 2N2222, the 2N4401 has a collector current limit of 500mA and power dissipation of 652mW, making it appropriate for medium loads, but it can also drive loads bigger than BC547.

Frequently Asked Questions In 2N4401

What is 2N4401?

The 2n4401 is a bipolar junction transistor with an NPN junction that is used for general-purpose amplification and switching. Conduction is carried out by both charge carriers, i.e. electrons...

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2SC945 Description

The 2SC945 is a high-frequency OSC NPN audio frequency amplifier transistor. It is an old Japanese bipolar audio NPN transistor, which has been widely used in high-frequency circuits for pre-amplification in amplifier applications.

2SC945 Features

  1.  Power dissipation of 0.4Watts. 

  2.  Collector current of 0.15A.

  3.  Collector-base Voltage: 60 volts

  4.  Operating and storage junction temperature range: -55°C to +150°C • Epoxy has a flammability grade of UL 94 V-0

  5.  Level 1 Moisture Sensitivity

2SC945 Pinout

2SC945 CAD Model

Symbol

Footprint

3D Model

Specifications

Package:TO-226-3, TO-92-3 (TO-226AA) (Formed Leads)

Operating Temperature: -55°C~150°C TJ

Pin Count: 3

Packaging: Tape & Box (TB)

Transistor Type: NPN

Transition Frequency: 150MHz

Number of Terminations: 3

2SC945 Equivalents

2SC2856TRANSISTORS, MPSA56/D26Z{OPTION18}TRANSISTORS, KSC2310-OTRANSISTORS, BC368-16TRANSISTORS, BSS38TRANSISTORS, ZTX455QTRANSISTORS, JC557ATRANSISTORS, BC546BRL1TRANSISTORS, ZTX450TRANSISTORS, BC546B-AMMOTRANSISTORS

Applications

1. Switches with low current

2. Pre-amplifiers

3. Low-power motor H-bridge circuits

4. Circuits for audio frequency amplifiers

5. Oscillator circuits

Where To Use 2SC945

Because it has a low base voltage of 5V, it can be easily controlled by an MCU/MPU if used as a switch. It can switch loads of up to 50 volts. With its complementary A733 PNP transistor, it can also be used as an oscillator.

Package

Manufacturer

Founded in 1991, Micro Commercial Components Corp. (MCC) is a manufacturer of high-quality discrete semiconductors to the consumer markets. It provides diodes, rectifiers, transistors, MOSFETs, voltage regulators and protection devices.

Datasheet

https://pdf.easybom.com/r/datasheets/microcommercialco-2sc945grap-datasheets-7531.pdf

Check out more details on: https://www.easybom.com/blog/a/the-introduction-of-2sc945

PN2222 Overview

The PN2222 is a popular NPN bipolar junction transistor that is used for common low-power intensification or swapping circuits. It is designed for low to intermediate current, modest power, and intermediate voltage, and it may operate at a moderately higher speed.

2N2222 Overview

The 2N2222 is a typical NPN bipolar junction transistor (BJT) used in low-power amplifying or switching applications. It is intended for low to medium current, low power, medium voltage, and relatively fast operation. It was originally created in the TO-18 metal container shown in the image.

What Is 2N2222 Used For?

The 2N2222 is a typical NPN bipolar junction transistor (BJT) used in low-power amplifying or switching applications. It is intended for low to medium current, low power, medium voltage, and relatively fast operation. It was originally created in the TO-18 metal container shown in the image.

PN2222 Pinout

2N2222 Pinout

PN2222 CAD Model

Symbol

Footprint

2N2222 CAD Model

Symbol

Footprint

3D Model

PN2222 Equivalents

Part Number	Description	Manufacturer
PN2222TFTRANSISTORS	600mA, 30V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92, LEAD FREE, TO-92, 3 PIN	Rochester Electronics LLC
PH2222TRANSISTORS	Transistor,	North American Philips Discrete Products Div
PN2222-AMMOTRANSISTORS	TRANSISTOR 600 mA, 30 V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92, BIP General Purpose Small Signal	NXP Semiconductors
PN2222/J18ZTRANSISTORS	500mA, 30V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92	Texas Instruments
PN2222-T/RTRANSISTORS	TRANSISTOR 600 mA, 30 V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92, BIP General Purpose Small Signal	NXP Semiconductors
PN2222/D81ZTRANSISTORS	500mA, 30V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92	Texas Instruments
PN2222TFRTRANSISTORS	600mA, 30V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92, LEAD FREE, TO-92, 3 PIN	Rochester Electronics LLC
PN2222TARTRANSISTORS	Small Signal Bipolar Transistor, 0.6A I(C), 30V V(BR)CEO, 1-Element, NPN, Silicon, TO-92, LEAD FREE, TO-92, 3 PIN	Fairchild Semiconductor Corporation
PN2222/D74ZTRANSISTORS	500mA, 30V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92	Texas Instruments
PN2222/D28ZTRANSISTORS	500mA, 30V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92	Texas Instruments

The Electrical Characteristics Of PN2222 And 2N2222

PARAMETER	SYMBOL	PN/2N2222
		MIN	MAX
Collector-Snitter Saturation	vCE（sat）*		0.4
Voltage			1.6
Base-Dnitter Saturation Voltage	vBE（sat）*		1.5 2.6
D.C. Current Gain	hFE *	100	500
Current Oain-Bandwidth Product		250
Collec         Capac it ance	Cob		8
Emitter-Base Capacitance	Cib		25
Collector-Base Time Constant	Cgbb'
Noise Figure	NF
Input Impedance	hie・
Voltage Feedback Ratio	hre
Small Si（＜nal Current Gain	hfe
Output Admittance	h°e
	td
>span class="font0">Rise Time	tr
Storage Time
Fall Time	tf

The Differences Between PN2222 And 2N2222

From above, we can see that there are lot of similarities between them. The two components are interchangeable under most circumstances, but there are just a few differences, like the packages they use are not the same type.

SOT23 vs SOT323 Overview

SOT23 and SOT323 are both plastic and surface-mounted packages. SOT23 owns 3 terminals, 1.9mm pitch, 2.9mm x 1.33mm x 1mm body, while SOT323 boasts 3 leads, 1.3mm pitch, 2mm x 1.25mm x 0.95mm body.

SOT23 vs SOT323 Pinout

SOT23 and SOT323 Differences In Feature

1.Two-line bidirectional ESD protectionl For CAN-Bus applications and interface ESD protection

2. Compact SOT-323 and SOT-23 packages

3. Low package height:

-SOT-323: 1.1mm

-SOT-23: 1.2mm

4. AEC-Q101 qualified versions available

5. Working range:

-VCAN16A2: ±16V

-VCAN33A2: ± 33V

6. Low leakage current: <0.05μA

7. Low load capacitance typical CD:

-VCAN16A2: ±16V, <18.5pF at 0V

-VCAN33A2: ±33V, <9.7pF at 0V

8. ESD protection acc. IEC 61000-4-2:

-±30kV contact discharge

-±30kV air discharge

9. Soldering can be checked by standard vision inspection (AOI = automated optical inspection)

10. e3 – pins plated with tin (Sn)

The Parameters Differences In SOT23 And SOT323

	Dimensions (mm)
	SOT23	SOT323
A	2.9	2.9
B	1.3	1.3
C
D
G	1.9	1.3
H
J
K
L	0.95	0.65
S
V

From the image and the diagram, we can see that there are two different dimensions in SOT23 and SOT323: The length of G is 1.9mm and 1.3mm and L is 0.95mm and 0.65mm respectively. When using the packages, we should check whether these two dimensions fit the component or not.

The Package Outlines of SOT323 and SOT23

SOT23 Package Outline

The Parameters Of SOT23 Package 

SOT323 Package Outline

The Parameters Of SOT23 Package 

The Soldering Differences in SOT23 and SOT323

Reflow Soldering

Wave Soldering

Conclusion

From above, we can know that there are a few differences between SOT23 and SOT323. For instance, the pitch of SOT323 is 0.6mm small than that of SOT23, and SOT323’s dimensions of body are smaller than SOT23’s, etc. There are various similarity between them, but we should check the detailed dimensions when using them.

NE5532 Overview

The NE5532 is a high-performance, low-noise operational amplifier with twin channels. It outperforms most typical operational amplifiers, including 1458, in terms of noise performance, output drive capability, and small-signal and power bandwidths.

As a result, the device is particularly well-suited for use in high-quality and professional audio equipment, instrumentation and control circuits, and telephone channel amplifiers. For gains of one, the op amp is internally adjusted. If very low noise is critical, the 5532A variant is recommended because it has guaranteed noise voltage standards.

TL072 Overview

The TL072 is a high-speed J–FET input dual operational amplifier with well-matched high voltage J–FET and bipolar transistors in a monolithic integrated circuit. High slew rates, low input bias and offset currents, and a low offset voltage temperature coefficient characterize the devices.

NE5532 Pinout

TL072 Pinout

NE5532 Equivalents

Part Number	Description	Manufacturer
TL082CDR2AMPLIFIER CIRCUITS	Operational Amplifier, 2 Func, 20000uV Offset-Max, BIPolar, PDSO8, PLASTIC, SO-8	Motorola Semiconductor Products
TL072ACNAMPLIFIER CIRCUITS	JFET inputs, low input bias current	STMicroelectronics
UPC4560CAMPLIFIER CIRCUITS	Operational Amplifier, 2 Func, 6000uV Offset-Max, BIPolar, PDIP8, 0.300 INCH, PLASTIC, DIP-8	NEC Electronics Group
UPC1458CAMPLIFIER CIRCUITS	Operational Amplifier, 2 Func, 6000uV Offset-Max, BIPolar, PDIP8, 0.300 INCH, PLASTIC, DIP-8	NEC Electronics Group
MC1558UGAMPLIFIER CIRCUITS	Operational Amplifier, 2 Func, BIPolar, CDIP8, LEAD FREE, CERAMIC, DIP-8	Motorola Semiconductor Products
TL082MJGAMPLIFIER CIRCUITS	IC,OP-AMP,DUAL,BIPOLAR/JFET,DIP,8PIN,CERAMIC	Freescale Semiconductor
MC4558L-D08-TAMPLIFIER CIRCUITS	Operational Amplifier, 2 Func, 6000uV Offset-Max, BIPolar, LEAD FREE, DIP-8	Unisonic Technologies Co Ltd
MC33178PAMPLIFIER CIRCUITS	IC,OP-AMP,DUAL,BIPOLAR,DIP,8PIN,PLASTIC	Freescale Semiconductor
MC4558UAMPLIFIER CIRCUITS	Operational Amplifier, 2 Func, 5000uV Offset-Max, BIPolar, CDIP8, CERAMIC, DIP-8	Motorola Semiconductor Products
TA75071PAMPLIFIER CIRCUITS	IC OP-AMP, 10000 uV OFFSET-MAX, 3 MHz BAND WIDTH, PDIP8, 0.300 INCH, 2.54 MM PITCH, PLASTIC, DIP-8, Operational Amplifier	Toshiba America Electronic Components

The Differences Between NE5532 And TL072 In Features

NE5532 Features:

• Small-Signal Bandwidth: 10 MHz

• Output Drive Capability: 600 , 10 VRMS

• Input Noise Voltage: 5.0 nV Hz  (Typical)

• DC Voltage Gain: 50000

• AC Voltage Gain: 2200 at 10 kHz

• Power Bandwidth: 140 kHz

• Slew Rate: 9.0 V/s

• Large Supply Voltage Range: 3.0 to 20 V

• Compensated for Unity Gain

• Pb−Free Packages are Available

TL072 Features:

• High slew rate: 20 V/μs (TL07xH, typ)

• Low offset voltage: 1 mV (TL07xH, typ)

• Low offset voltage drift: 2 μV/°C

• Low power consumption: 940 μA/ch (TL07xH, typ)

• Wide common-mode and differential voltage ranges

– Common-mode input voltage range includes VCC+

• Low input bias and offset currents

• Low noise: Vn = 18 nV/√Hz (typ) at f = 1 kHz

• Output short-circuit protection

• Low total harmonic distortion: 0.003% (typ)

• Wide supply voltage: ±2.25 V to ±20 V, 4.5 V to 40 V

NE5532 needs lower noise voltage than TL072, the high slew rate of NE5532 is also lower than TL072.

The Differences Between NE5532 And TL072 In Applications

NE5532 Applications:

• AV Receivers

• Embedded PCs

• Netbooks

• Video Broadcasting and Infrastructure: Scalable Platforms

• DVD Recorders and Players

• Multichannel Video Transcoders

• Pro Audio Mixers

TL072 Applications:

• Solar energy: string and central inverter

• Motor drives: AC and servo drive control and power stage modules

• Single phase online UPS

• Three phase UPS

• Pro audio mixers

• Battery test equipment

The NE5532 outperforms the TLO72 in almost every aspect of audio...

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