Darlington Pairs

What are Darlington Pairs?

Darlington pairs, also called Darlington transistors, are a package of two standard BJT transistors (bipolar junction transistor). One of the transistors is high-gain while the other is high current. 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 micro controller 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.

How do they work?

The emitter of one transistor is connected to the base of the other transistor which effectively creates one transistor.

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 board.

What applications do 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.

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 81 - 100 of 467 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. 922-7762
Mfr. Part No.ZTX605
$0.668
Each (In a Bag of 4000)
units
NPN 1 A 120 V 10 V E-Line Through Hole 3 - Single 1 500 1.8 V 140 V 1.5 V
RS Stock No. 165-7512
Mfr. Part No.BSP60H6327XTSA1
BrandInfineon
$0.442
Each (On a Reel of 1000)
units
PNP 1 A 45 V 5 V SOT-223 Surface Mount 3 + Tab - Single 1 1000 2.2 V 60 V 1.8 V
RS Stock No. 166-2727
Mfr. Part No.KSP13BU
$0.068
Each (In a Bag of 10000)
units
NPN 500 mA 30 V 10 V TO-92 Through Hole 3 - Single 1 5000 - 30 V 1.5 V
RS Stock No. 652-819
Mfr. Part No.ULN2002AN
$2.02
Each
units
NPN 500 mA 50 V - PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 923-6661
Mfr. Part No.ULN2003AID
$0.948
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. 808-0512
Mfr. Part No.TIP126TU
$1.056
Each (In a Pack of 25)
units
PNP -5 A 80 V -5 V TO-220 Through Hole 3 - Single 2 1000 - -80 V -2 V
RS Stock No. 774-3650
Mfr. Part No.TIP125G
$1.12
Each (In a Pack of 5)
units
PNP 8 A 60 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 60 V 4 V
RS Stock No. 739-0344
Mfr. Part No.KSP13BU
$0.346
Each (In a Pack of 10)
units
NPN 500 mA 30 V 10 V TO-92 Through Hole 3 - Single 1 5000 - 30 V 1.5 V
RS Stock No. 790-5393
Mfr. Part No.MJH11021G
$6.78
Each (In a Pack of 2)
units
PNP 15 A 250 V 5 V TO-247 Through Hole 3 - Single 1 100 3.8 V 250 V 4 V
RS Stock No. 102-4105
Mfr. Part No.BDX54C
$0.815
Each (In a Tube of 50)
units
PNP 8 A 100 V 5 V TO-220 Through Hole 3 - Single 1 750 2.5 V 100 V 2 V
RS Stock No. 714-2690
Mfr. Part No.BDX54C
$0.858
Each (In a Pack of 10)
units
PNP 8 A 100 V 5 V TO-220 Through Hole 3 - Single 1 750 2.5 V 100 V 2 V
RS Stock No. 921-5181
Mfr. Part No.ULN2003AIN
$0.988
Each (In a Tube of 25)
units
NPN 500 mA 50 V - PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 162-6795
Mfr. Part No.ULN2003LVDR
$0.424
Each (On a Reel of 2500)
units
NPN 140 mA 8 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 0.49 V
RS Stock No. 809-5475
Mfr. Part No.ULN2003LVDR
$0.99
Each
units
NPN 140 mA 8 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 0.49 V
RS Stock No. 752-8205
Mfr. Part No.BSP60H6327XTSA1
BrandInfineon
$0.486
Each (In a Pack of 10)
units
PNP 1 A 45 V 5 V SOT-223 Surface Mount 3 + Tab - Single 1 1000 2.2 V 60 V 1.8 V
RS Stock No. 145-2830
Mfr. Part No.TIP125G
$0.913
Each (In a Tube of 50)
units
PNP 8 A 60 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 60 V 4 V
RS Stock No. 124-1409
Mfr. Part No.TIP126TU
$0.943
Each (In a Tube of 50)
units
PNP -5 A 80 V -5 V TO-220 Through Hole 3 - Single 2 1000 - -80 V -2 V
RS Stock No. 732-0887
Mfr. Part No.ULN2003AIN
$1.37
Each (In a Pack of 5)
units
NPN 500 mA 50 V - PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 665-9197
Mfr. Part No.ULN2003AID
$0.962
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. 144-9908
Mfr. Part No.ULN2002AN
$1.583
Each (In a Tube of 25)
units
NPN 500 mA 50 V - PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V
Related Products
NPN Darlington Transistors, STMicroelectronics A broad range of ...
Description:
NPN Darlington Transistors, STMicroelectronics A broad range of NPN and PNP Bipolar Transistors from STMicroelectronics including General Purpose, Darlington, Power and High-Voltage devices in both SMT and Through-hole packages.
NPN Darlington Transistors, STMicroelectronics A broad range of ...
Description:
NPN Darlington Transistors, STMicroelectronics A broad range of NPN and PNP Bipolar Transistors from STMicroelectronics including General Purpose, Darlington, Power and High-Voltage devices in both SMT and Through-hole packages.
Darlington Transistor Arrays, STMicroelectronics Darlington transistor power drivers ...
Description:
Darlington Transistor Arrays, STMicroelectronics Darlington transistor power drivers are high-voltage, high-current switch arrays containing multiple open-collector Darlington pairs and integral suppression diodes for inductive loads The high current rating of each output is 500 mA or higher. The inputs are ...
Darlington Transistor Arrays, STMicroelectronics Darlington transistor power drivers ...
Description:
Darlington Transistor Arrays, STMicroelectronics Darlington transistor power drivers are high-voltage, high-current switch arrays containing multiple open-collector Darlington pairs and integral suppression diodes for inductive loads The high current rating of each output is 500 mA or higher. The inputs are ...