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. 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. 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. 923-6661
FabrikantnummerULN2003AID
0,418 €
Each (In a Tube of 40)
Aantal stuks
NPN 500 mA 50 V - SOIC Surface Mount 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
RS-stocknr. 665-8699
FabrikantnummerULN2003ADR
0,362 €
Each (In a Pack of 10)
Aantal stuks
NPN 500 mA 50 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS-stocknr. 144-9908
FabrikantnummerULN2002AN
0,824 €
Each (In a Tube of 25)
Aantal stuks
NPN 500 mA 50 V - PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V
RS-stocknr. 121-8478
FabrikantnummerULN2003AD
0,342 €
Each (In a Tube of 40)
Aantal stuks
NPN 500 mA 50 V 50 V SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS-stocknr. 162-6796
FabrikantnummerULN2003V12DR
0,192 €
Each (On a Reel of 2500)
Aantal stuks
NPN 140 mA 20 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 0.75 V
RS-stocknr. 858-196
FabrikantnummerULN2003AD
0,42 €
Each
Aantal stuks
NPN 500 mA 50 V 50 V SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS-stocknr. 922-2987
FabrikantnummerULN2003ADR
0,192 €
Each (On a Reel of 2500)
Aantal stuks
NPN 500 mA 50 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS-stocknr. 809-5488
FabrikantnummerULN2003V12DR
0,482 €
Each (In a Pack of 5)
Aantal stuks
NPN 140 mA 20 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 0.75 V
RS-stocknr. 709-2879
FabrikantnummerSN75469NE4
0,832 €
Each (In a Pack of 5)
Aantal stuks
NPN 500 mA 100 V - PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V
RS-stocknr. 921-5181
FabrikantnummerULN2003AIN
0,456 €
Each (In a Tube of 25)
Aantal stuks
NPN 500 mA 50 V - PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V
RS-stocknr. 100-3837
FabrikantnummerULN2003AN
0,433 €
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. 145-0190
FabrikantnummerULN2003APW
0,426 €
Each (In a Tube of 90)
Aantal stuks
NPN 500 mA 50 V - TSSOP Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS-stocknr. 145-0726
FabrikantnummerULQ2003AD
0,456 €
Each (In a Tube of 40)
Aantal stuks
NPN 500 mA 50 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS-stocknr. 858-203
FabrikantnummerULN2004AD
0,52 €
Each
Aantal stuks
NPN 500 mA 50 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS-stocknr. 145-0189
FabrikantnummerSN75469D
0,343 €
Each (In a Tube of 40)
Aantal stuks
NPN 500 mA 100 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 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. 197-7631
FabrikantnummerULN2003ADR
0,163 €
Each (On a Reel of 2500)
Aantal stuks
NPN - 50 V - SOIC - 16 - - 7 - - - -