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 1 - 20 of 471 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. 774-3653
Mfr. Part No.TIP120G
PHP25.862
Each (In a Pack of 10)
units
NPN 8 A 60 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 60 V 4 V
RS Stock No. 103-5146
Mfr. Part No.TIP120G
PHP24.859
Each (In a Tube of 50)
units
NPN 8 A 60 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 60 V 4 V
RS Stock No. 714-1167
Mfr. Part No.ULN2803A
PHP57.594
Each (In a Pack of 5)
units
NPN 500 mA 50 V 50 V PDIP Through Hole 18 - Common Emitter 8 1000 - - 1.1 V
RS Stock No. 168-6833
Mfr. Part No.ULN2803A
PHP50.029
Each (In a Tube of 20)
units
NPN 500 mA 50 V 50 V PDIP Through Hole 18 - Common Emitter 8 1000 - - 1.1 V
RS Stock No. 251-3299
Mfr. Part No.TIP125
PHP29.01
Each
units
PNP 5 A 60 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 60 V 4 V
RS Stock No. 168-6054
Mfr. Part No.TIP125
PHP23.717
Each (In a Tube of 50)
units
PNP 5 A 60 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 60 V 4 V
RS Stock No. 168-6450
Mfr. Part No.ULN2003A
PHP19.533
Each (In a Tube of 25)
units
NPN 500 mA 50 V - PDIP Through Hole 16 - Common Emitter 7 1000 - - 1.6 V
RS Stock No. 686-8209
Mfr. Part No.ULN2003A
PHP20.306
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. 436-8451
Mfr. Part No.ULN2003AN
PHP37.49
Each
units
NPN 500 mA 50 V 50 V PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 100-3837
Mfr. Part No.ULN2003AN
PHP26.408
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. 790-5393
Mfr. Part No.MJH11021G
PHP188.295
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. 646-6311
Mfr. Part No.ULN2803ADW
PHP74.538
Each (In a Pack of 5)
units
NPN 500 mA 50 V 50 V SOIC Surface Mount 18 - Common Emitter 8 - - - 1.6 V
RS Stock No. 866-0196
Mfr. Part No.ULN2803ADW
PHP63.427
Each (In a Tube of 40)
units
NPN 500 mA 50 V - SOIC Surface Mount 18 - Common Emitter 8 - - - 1.6 V
RS Stock No. 121-6417
Mfr. Part No.MJH11021G
PHP161.348
Each (In a Tube of 30)
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. 166-0475
Mfr. Part No.BSP50,115
BrandNexperia
PHP11.476
Each (On a Reel of 1000)
units
NPN 800 mA 45 V 5 V SOT-223 Surface Mount 3 + Tab - Single 1 1000 1.9 V 60 V 1.3 V
RS Stock No. 484-5251
Mfr. Part No.BSP50,115
BrandNexperia
PHP24.444
Each (In a Pack of 10)
units
NPN 1 A 45 V 5 V SOT-223 (SC-73) Surface Mount 4 - Single 1 1000 1.9 V 60 V 1.3 V
RS Stock No. 102-4091
Mfr. Part No.TIP142
PHP76.836
Each (In a Tube of 30)
units
NPN 10 A 100 V 5 V TO-247 Through Hole 3 - Single 1 500 - 100 V 3 V
RS Stock No. 665-8699
Mfr. Part No.ULN2003ADR
PHP23.62
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. 486-0294
Mfr. Part No.TIP142
PHP91.484
Each (In a Pack of 5)
units
NPN 10 A 100 V 5 V TO-247 Through Hole 3 - Single 1 500 - 100 V 3 V
RS Stock No. 858-196
Mfr. Part No.ULN2003AD
PHP28.33
Each
units
NPN 500 mA 50 V 50 V SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
Related Products
Bipolar Junction Transistors (BJT) broad range provides complete ...
Description:
Bipolar Junction Transistors (BJT) broad range provides complete solutions for various circuit application needs. Innovative packages are designed for minimal size, highest reliability and maximum thermal performance.
This array of seven Darlington transistor circuits is ...
Description:
This array of seven Darlington transistor circuits is able to drive high output current (500 mA). Built in input resistor limits the base currentBuild in clamp diode at the output absorbs surge currentsInput and output pins layout is separated on ...
Bipolar Junction Transistors (BJT) broad range provides complete ...
Description:
Bipolar Junction Transistors (BJT) broad range provides complete solutions for various circuit application needs. Innovative packages are designed for minimal size, highest reliability and maximum thermal performance.
Bipolar Junction Transistors (BJT) broad range provides complete ...
Description:
Bipolar Junction Transistors (BJT) broad range provides complete solutions for various circuit application needs. Innovative packages are designed for minimal size, highest reliability and maximum thermal performance.