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)


...
Read more Read less

Filters

Viewing 61 - 80 of 449 products
Results per page
Description Price 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 Stock No. 665-9190
Mfr. Part No.ULN2003APW
$0.87
Each (In a Pack of 10)
units
NPN 500 mA 50 V - TSSOP Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 145-3891
Mfr. Part No.2N6039G
$0.582
Each (In a Box of 500)
units
NPN 4 A 80 V 5 V TO-225AA Through Hole 3 - Single 1 100 4 V 80 V 3 V
RS Stock No. 166-1532
Mfr. Part No.BST52,115
BrandNexperia
$0.43
Each (On a Reel of 1000)
units
NPN 1 A 80 V 5 V UPAK Surface Mount 4 - Single 1 1000 1.9 V 90 V 1.3 V
RS Stock No. 790-5375
Mfr. Part No.MJE5742G
$2.56
Each (In a Pack of 5)
units
NPN 8 A 400 V 8 V TO-220 Through Hole 3 - Single 1 50 3.5 V - 3 V
RS Stock No. 485-9086
Mfr. Part No.BDX53C
$1.82
Each (In a Pack of 5)
units
NPN 8 A 100 V 5 V TO-220 Through Hole 3 - Single 1 750 2.5 V 100 V 2 V
RS Stock No. 669-7638
Mfr. Part No.FMMT634TA
$0.888
Each (In a Pack of 5)
units
NPN 900 mA 100 V 12 V SOT-23 Surface Mount 3 - Single 1 5000 1.65 V 120 V 0.96 V
RS Stock No. 686-8203
Mfr. Part No.ULN2004A
$0.771
Each (In a Pack of 20)
units
NPN 500 mA 50 V - PDIP Through Hole 16 - Common Emitter 7 1000 - - 1.6 V
RS Stock No. 121-8459
Mfr. Part No.ULN2004AN
$0.898
Each (In a Tube of 25)
units
NPN 500 mA 50 V 50 V PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 125-0077
Mfr. Part No.MJF122G
$1.218
Each (In a Tube of 50)
units
NPN 8 A 100 V 5 V TO-220FP Through Hole 3 - Single 1 1000 - 100 V 3.5 V dc
RS Stock No. 919-6472
Mfr. Part No.ULN2003D1013TR
$0.298
Each (On a Reel of 2500)
units
NPN 500 mA 50 V - SOIC Surface Mount 16 - Common Emitter 7 1000 - - 1.6 V
RS Stock No. 652-825
Mfr. Part No.ULN2004AN
$1.28
Each
units
NPN 500 mA 50 V 50 V PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 665-9197
Mfr. Part No.ULN2003AID
$0.932
Each (In a Pack of 10)
units
NPN 500 mA 50 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 923-6661
Mfr. Part No.ULN2003AID
$0.875
Each (In a Tube of 40)
units
NPN 500 mA 50 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 163-1232
Mfr. Part No.TIP142G
$2.657
Each (In a Tube of 30)
units
NPN 10 A 100 V 5 V TO-247 Through Hole 3 - Single 1 500 3.5 V 100 V 3 V
RS Stock No. 163-0840
Mfr. Part No.2N6052G
$8.568
Each (In a Tray of 100)
units
PNP 12 A 100 V 5 V TO-204 Through Hole 2 - Single 1 100 4 V 100 V 3 V
RS Stock No. 163-1231
Mfr. Part No.TIP140G
$2.441
Each (In a Tube of 30)
units
NPN 10 A 60 V 5 V TO-247 Through Hole 3 - Single 1 500 3.5 V 60 V 3 V
RS Stock No. 102-4097
Mfr. Part No.BU931P
$4.379
Each (In a Tube of 30)
units
NPN 15 A 400 V 5 V TO-247 Through Hole 3 - Single 1 300 2.5 V - 1.8 V
RS Stock No. 792-4694
Mfr. Part No.MJF122G
$1.472
Each (In a Pack of 5)
units
NPN 8 A 100 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 100 V 3.5 V dc
RS Stock No. 168-6057
Mfr. Part No.BD682
$1.023
Each (In a Tube of 50)
units
PNP 4 A 100 V 5 V SOT-32 Through Hole 3 - Single 1 750 - 100 V 2.5 V
RS Stock No. 426-229
Mfr. Part No.ULN2003D1013TR
$1.316
Each (In a Pack of 10)
units
NPN 500 mA 50 V - SOIC Surface Mount 16 - Common Emitter 7 1000 - - 1.6 V