Darlington Pairs

Darlington pairs, also known as Darlington Transistors are discrete semiconductor devices consisting of a package of two standard BJT transistors (bipolar junction transistor). One of the transistors is high-gain while the other is high current. RS Components offer a wide range of high-quality Darlington Transistors from leading brands including ON Semiconductor, STMicroelectronics, Texas Instruments and Nexperia.

How do they work?

The emitter of one transistor is connected to the base of the other transistor which effectively creates one transistor. They are used to amplify weak signals from one circuit to another circuit or microprocessor. This means that the tiny current from a sensor or microcontroller I/O pin can be amplified to drive a large load. Darlington pairs can also be operated as an ON/OFF switch. Darlington pairs work together as a single transistor but feature a much higher current gain. They also offer high input impedance in comparison to single transistors.

Why should you use a Darlington pair?

Darlington pairs provide a very high current gain. Working as two transistors within one package, Darlington pairs have a very compact footprint which takes up minimal space on a (PCB) printed circuit board.

What applications would you use them in?

With high current gain, Darlington transistors are well suited to power applications such as driving motors and relays. Darlington pairs are ideal for application in display drivers, audio outputs, power regulators, light sensors, touch sensors and power supply outputs. It is not recommended to use them in applications that require high frequency as it is not possible to shut the base current off immediately.

What are the different types?

Darlington pairs can consist of either NPN (negative-positive-negative) transistors, PNP (positive-negative-positive) transistors or both.

Darlington pairs are typically supplied in one of two ways. You can purchase them as an array (called a Darlington array) within a single integrated circuit (IC) package, or as a simple single discrete component.

Standard package type examples include SOT-23, SOIC, TO-220 and TO-252 (DPAK)


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Omschrijving Prijs Transistor Type Maximum Continuous Collector Current Maximum Collector Emitter Voltage Maximum Emitter Base Voltage Package Type Mounting Type Pin Count Configuration Transistor Configuration Number of Elements per Chip Minimum DC Current Gain Maximum Base Emitter Saturation Voltage Maximum Collector Base Voltage Maximum Collector Emitter Saturation Voltage
RS-stocknr. 163-2366
FabrikantnummerBDW42G
FabrikantON Semiconductor
€ 0,58
Each (In a Tube of 50)
Aantal stuks
NPN 15 A 100 V 5 V TO-220AB Through Hole 3 - Single 1 250 - 100 V 3 V
RS-stocknr. 545-2513
FabrikantnummerBDW42G
FabrikantON Semiconductor
€ 0,704
Each (In a Pack of 5)
Aantal stuks
NPN 15 A 100 V 5 V TO-220AB Through Hole 3 - Single 1 250 - 100 V 3 V
RS-stocknr. 168-6450
FabrikantnummerULN2003A
€ 0,354
Each (In a Tube of 25)
Aantal stuks
NPN 500 mA 50 V - PDIP Through Hole 16 - Common Emitter 7 1000 - - 1.6 V
RS-stocknr. 686-8209
FabrikantnummerULN2003A
€ 0,353
Each (In a Pack of 20)
Aantal stuks
NPN 500 mA 50 V - PDIP Through Hole 16 - Common Emitter 7 1000 - - 1.6 V
RS-stocknr. 102-4100
FabrikantnummerTIP121
€ 0,422
Each (In a Tube of 50)
Aantal stuks
NPN 5 A 80 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 80 V 4 V
RS-stocknr. 485-9660
FabrikantnummerTIP121
€ 0,528
Each (In a Pack of 5)
Aantal stuks
NPN 5 A 80 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 80 V 4 V
RS-stocknr. 714-1167
FabrikantnummerULN2803A
€ 1,028
Each (In a Pack of 5)
Aantal stuks
NPN 500 mA 50 V 50 V PDIP Through Hole 18 - Common Emitter 8 1000 - - 1.1 V
RS-stocknr. 168-6833
FabrikantnummerULN2803A
€ 0,872
Each (In a Tube of 20)
Aantal stuks
NPN 500 mA 50 V 50 V PDIP Through Hole 18 - Common Emitter 8 1000 - - 1.1 V
RS-stocknr. 544-9882
FabrikantnummerBDX54CG
FabrikantON Semiconductor
€ 0,568
Each (In a Tube of 50)
Aantal stuks
PNP 8 A 100 V 5 V TO-220AB Through Hole 3 - Single 1 750 2.5 V 100 V 2 V
RS-stocknr. 102-4091
FabrikantnummerTIP142
€ 1,381
Each (In a Tube of 30)
Aantal stuks
NPN 10 A 100 V 5 V TO-247 Through Hole 3 - Single 1 500 - 100 V 3 V
RS-stocknr. 486-0294
FabrikantnummerTIP142
€ 1,63
Each (In a Pack of 5)
Aantal stuks
NPN 10 A 100 V 5 V TO-247 Through Hole 3 - Single 1 500 - 100 V 3 V
RS-stocknr. 680-7220
FabrikantnummerA2982SLWTR-T
€ 1,942
Each (In a Pack of 5)
Aantal stuks
NPN + PNP 500 mA 50 V - SOIC W Surface Mount 20 - - 8 - - - 2 V
RS-stocknr. 177-5536
FabrikantnummerA2982SLWTR-T
€ 2,031
Each (On a Reel of 1000)
Aantal stuks
NPN + PNP 500 mA 50 V - SOIC W Surface Mount 20 - - 8 - - - 2 V
RS-stocknr. 646-6311
FabrikantnummerULN2803ADW
€ 1,336
Each (In a Pack of 5)
Aantal stuks
NPN 500 mA 50 V 50 V SOIC Surface Mount 18 - Common Emitter 8 - - - 1.6 V
RS-stocknr. 866-0196
FabrikantnummerULN2803ADW
€ 1,144
Each (In a Tube of 40)
Aantal stuks
NPN 500 mA 50 V - SOIC Surface Mount 18 - Common Emitter 8 - - - 1.6 V
RS-stocknr. 100-3837
FabrikantnummerULN2003AN
€ 0,471
Each (In a Tube of 25)
Aantal stuks
NPN 500 mA 50 V 50 V PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V
RS-stocknr. 103-5146
FabrikantnummerTIP120G
FabrikantON Semiconductor
€ 0,415
Each (In a Tube of 50)
Aantal stuks
NPN 8 A 60 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 60 V 4 V
RS-stocknr. 774-3653
FabrikantnummerTIP120G
FabrikantON Semiconductor
€ 0,442
Each (In a Pack of 10)
Aantal stuks
NPN 8 A 60 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 60 V 4 V
RS-stocknr. 436-8451
FabrikantnummerULN2003AN
€ 0,53
Each
Aantal stuks
NPN 500 mA 50 V 50 V PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V
RS-stocknr. 665-9197
FabrikantnummerULN2003AID
€ 0,417
Each (In a Pack of 10)
Aantal stuks
NPN 500 mA 50 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V