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 typesDarlington 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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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. 103-5146
Mfr. Part No.TIP120G
PHP28.009
Each (In a Tube of 50)
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NPN 8 A 60 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 60 V 4 V
RS Stock No. 774-3653
Mfr. Part No.TIP120G
PHP27.46
Each (In a Pack of 10)
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NPN 8 A 60 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 60 V 4 V
RS Stock No. 168-6833
Mfr. Part No.ULN2803A
PHP54.621
Each (In a Tube of 20)
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NPN 500 mA 50 V 50 V PDIP Through Hole 18 - Common Emitter 8 1000 - - 1.1 V
RS Stock No. 714-1167
Mfr. Part No.ULN2803A
PHP63.73
Each (In a Pack of 5)
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NPN 500 mA 50 V 50 V PDIP Through Hole 18 - Common Emitter 8 1000 - - 1.1 V
RS Stock No. 168-6054
Mfr. Part No.TIP125
PHP27.04
Each (In a Tube of 50)
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PNP 5 A 60 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 60 V 4 V
RS Stock No. 251-3299
Mfr. Part No.TIP125
PHP32.55
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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
PHP25.174
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
PHP25.174
Each (In a Pack of 20)
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NPN 500 mA 50 V - PDIP Through Hole 16 - Common Emitter 7 1000 - - 1.6 V
RS Stock No. 100-3837
Mfr. Part No.ULN2003AN
PHP33.742
Each (In a Tube of 25)
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NPN 500 mA 50 V 50 V PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 436-8451
Mfr. Part No.ULN2003AN
PHP37.49
Each
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NPN 500 mA 50 V 50 V PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 121-6417
Mfr. Part No.MJH11021G
PHP180.469
Each (In a Tube of 30)
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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. 790-5393
Mfr. Part No.MJH11021G
PHP212.06
Each (In a Pack of 2)
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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. 866-0196
Mfr. Part No.ULN2803ADW
PHP68.544
Each (In a Tube of 40)
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NPN 500 mA 50 V - SOIC Surface Mount 18 - Common Emitter 8 - - - 1.6 V
RS Stock No. 646-6311
Mfr. Part No.ULN2803ADW
PHP80.866
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. 484-5251
Mfr. Part No.BSP50,115
BrandNexperia
PHP27.56
Each (In a Pack of 10)
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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. 166-0475
Mfr. Part No.BSP50,115
BrandNexperia
PHP13.02
Each (On a Reel of 1000)
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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. 665-8699
Mfr. Part No.ULN2003ADR
PHP25.112
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. 168-6447
Mfr. Part No.ULN2804A
PHP48.51
Each (In a Tube of 20)
units
- - 50 V - PDIP Through Hole 18 - - - - - - -
RS Stock No. 486-0294
Mfr. Part No.TIP142
PHP98.70
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. 121-8478
Mfr. Part No.ULN2003AD
PHP30.338
Each (In a Tube of 40)
units
NPN 500 mA 50 V 50 V SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
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Description:
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 pinned opposite the outputs ...
Darlington transistor power drivers are high-voltage, high-current switch ...
Description:
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 pinned opposite the outputs ...
The ON Semiconductor TIP127G is a 5A, 100V ...
Description:
The ON Semiconductor TIP127G is a 5A, 100V PNP Darlington bipolar power transistor. It is designed to be used as an output device for general purpose amplifier applications.The TIP127G comes in a plastic TO-220AB through-hole package. • High DC Current ...
Range of NPN Silicon Photodarlington transistors from Optek ...
Description:
Range of NPN Silicon Photodarlington transistors from Optek offer a hermetically sealed TO-18 package. Designed with a narrow receiving angle, providing excellent on-axis coupling.