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. 168-6833
FabrikantnummerULN2803A
1,108 €
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. 714-1167
FabrikantnummerULN2803A
1,298 €
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. 168-6450
FabrikantnummerULN2003A
0,496 €
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
0,496 €
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. 102-4091
FabrikantnummerTIP142
1,657 €
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
1,956 €
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. 102-4105
FabrikantnummerBDX54C
0,519 €
Each (In a Tube of 50)
Aantal stuks
PNP 8 A 100 V 5 V TO-220 Through Hole 3 - Single 1 750 2.5 V 100 V 2 V
RS-stocknr. 714-2690
FabrikantnummerBDX54C
0,519 €
Each (In a Pack of 10)
Aantal stuks
PNP 8 A 100 V 5 V TO-220 Through Hole 3 - Single 1 750 2.5 V 100 V 2 V
RS-stocknr. 485-8667
FabrikantnummerTIP142T
1,534 €
Each (In a Pack of 5)
Aantal stuks
NPN 10 A 100 V 5 V TO-220 Through Hole 3 - Single 1 500 - 100 V 3 V
RS-stocknr. 102-4089
FabrikantnummerTIP142T
1,296 €
Each (In a Tube of 50)
Aantal stuks
NPN 10 A 100 V 5 V TO-220 Through Hole 3 - Single 1 500 - 100 V 3 V
RS-stocknr. 102-4104
FabrikantnummerTIP147
1,247 €
Each (In a Tube of 30)
Aantal stuks
PNP 10 A 100 V 5 V TO-247 Through Hole 3 - Single 1 500 - 100 V 3 V
RS-stocknr. 486-0301
FabrikantnummerTIP147
1,48 €
Each
Aantal stuks
PNP 10 A 100 V 5 V TO-247 Through Hole 3 - Single 1 500 - 100 V 3 V
RS-stocknr. 919-6472
FabrikantnummerULN2003D1013TR
0,175 €
Each (On a Reel of 2500)
Aantal stuks
NPN 500 mA 50 V - SOIC Surface Mount 16 - Common Emitter 7 1000 - - 1.6 V
RS-stocknr. 251-9893
FabrikantnummerBD682
0,712 €
Each (In a Pack of 5)
Aantal stuks
PNP 4 A 100 V 5 V SOT-32 Through Hole 3 - Single 1 750 - 100 V 2.5 V
RS-stocknr. 426-229
FabrikantnummerULN2003D1013TR
0,418 €
Each (In a Pack of 10)
Aantal stuks
NPN 500 mA 50 V - SOIC Surface Mount 16 - Common Emitter 7 1000 - - 1.6 V
RS-stocknr. 168-6057
FabrikantnummerBD682
0,587 €
Each (In a Tube of 50)
Aantal stuks
PNP 4 A 100 V 5 V SOT-32 Through Hole 3 - Single 1 750 - 100 V 2.5 V
RS-stocknr. 714-1164
FabrikantnummerULN2802A
1,118 €
Each (In a Pack of 5)
Aantal stuks
NPN 500 mA 50 V - PDIP Through Hole 18 - Common Emitter 8 - - - 1.1 V
RS-stocknr. 313-3204
FabrikantnummerBD681
0,92 €
Each
Aantal stuks
NPN 4 A 100 V 5 V SOT-32 Through Hole 3 - Single 1 750 - 100 V 2.5 V
RS-stocknr. 102-4092
FabrikantnummerBDW93C
0,613 €
Each (In a Tube of 50)
Aantal stuks
NPN 12 A 100 V - TO-220 Through Hole 3 - Single 1 100 4 V 100 V 3 V
RS-stocknr. 168-6447
FabrikantnummerULN2804A
0,957 €
Each (In a Tube of 20)
Aantal stuks
- - 50 V - PDIP Through Hole 18 - - - - - - -