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).

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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. 166-1922
FabrikantnummerMMBTA14
FabrikantON Semiconductor
0,028 €
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Aantal stuks
NPN 1.2 A 30 V 10 V SOT-23 Surface Mount 3 - Single 1 20000 - 30 V 1.5 V
RS-stocknr. 803-1973
FabrikantnummerMMBTA14
FabrikantON Semiconductor
0,07 €
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Aantal stuks
NPN 1.2 A 30 V 10 V SOT-23 Surface Mount 3 - Single 1 20000 - 30 V 1.5 V
RS-stocknr. 688-1502
FabrikantnummerMJ11015G
FabrikantON Semiconductor
6,045 €
Each (In a Pack of 2)
Aantal stuks
PNP 30 A 120 V 5 V TO-204 Through Hole 3 - Single 1 200 5 V 120 V 4 V
RS-stocknr. 103-5055
FabrikantnummerMJ11015G
FabrikantON Semiconductor
4,565 €
Each (In a Tray of 100)
Aantal stuks
PNP 30 A 120 V 5 V TO-204 Through Hole 3 - Single 1 200 5 V 120 V 4 V
RS-stocknr. 100-7565
FabrikantnummerMJ11016G
FabrikantON Semiconductor
4,341 €
Each (In a Tray of 100)
Aantal stuks
NPN 30 A 120 V 5 V TO-204 Through Hole 3 - Single 1 200 5 V 120 V 4 V
RS-stocknr. 463-000
FabrikantnummerMJ11016G
FabrikantON Semiconductor
5,89 €
Each (In a Pack of 2)
Aantal stuks
NPN 30 A 120 V 5 V TO-204 Through Hole 3 - Single 1 200 5 V 120 V 4 V
RS-stocknr. 122-0071
FabrikantnummerMJ11016G
FabrikantON Semiconductor
4,341 €
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NPN 30 A 120 V 5 V TO-204 Through Hole 3 - Single 1 200 5 V 120 V 4 V
RS-stocknr. 739-0344
FabrikantnummerKSP13BU
FabrikantON Semiconductor
0,232 €
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Aantal stuks
NPN 500 mA 30 V 10 V TO-92 Through Hole 3 - Single 1 5000 - 30 V 1.5 V
RS-stocknr. 544-9882
FabrikantnummerBDX54CG
FabrikantON Semiconductor
0,657 €
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PNP 8 A 100 V 5 V TO-220AB Through Hole 3 - Single 1 750 2.5 V 100 V 2 V
RS-stocknr. 760-6043
FabrikantnummerMMBTA64
FabrikantON Semiconductor
0,102 €
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Aantal stuks
PNP -1.2 A 30 V -10 V SOT-23 Surface Mount 3 - Single 1 20000 - -30 V -1.5 V
RS-stocknr. 166-2727
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FabrikantON Semiconductor
0,039 €
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Aantal stuks
NPN 500 mA 30 V 10 V TO-92 Through Hole 3 - Single 1 5000 - 30 V 1.5 V
RS-stocknr. 807-5172
FabrikantnummerBDX53CTU
FabrikantON Semiconductor
0,562 €
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Aantal stuks
NPN 8 A 100 V 5 V TO-220 Through Hole 3 - Single 1 750 2.5 V 100 V 2 V
RS-stocknr. 103-5146
FabrikantnummerTIP120G
FabrikantON Semiconductor
0,451 €
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NPN 8 A 60 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 60 V 4 V
RS-stocknr. 774-3653
FabrikantnummerTIP120G
FabrikantON Semiconductor
0,467 €
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Aantal stuks
NPN 8 A 60 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 60 V 4 V
RS-stocknr. 169-8516
FabrikantnummerBDX53CTU
FabrikantON Semiconductor
0,519 €
Each (In a Tube of 50)
Aantal stuks
NPN 8 A 100 V 5 V TO-220 Through Hole 3 - Single 1 750 2.5 V 100 V 2 V
RS-stocknr. 545-2513
FabrikantnummerBDW42G
FabrikantON Semiconductor
0,716 €
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NPN 15 A 100 V 5 V TO-220AB Through Hole 3 - Single 1 250 - 100 V 3 V
RS-stocknr. 773-7743
FabrikantnummerMC1413BDR2G
FabrikantON Semiconductor
0,414 €
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Aantal stuks
NPN 500 mA 50 V 5 V SOIC Surface Mount 16 - Common Emitter 7 1000 - - 1.6 V
RS-stocknr. 178-7560
FabrikantnummerMC1413BDR2G
FabrikantON Semiconductor
0,167 €
Each (On a Reel of 2500)
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 163-2366
FabrikantnummerBDW42G
FabrikantON Semiconductor
0,598 €
Each (In a Tube of 50)
Aantal stuks
NPN 15 A 100 V 5 V TO-220AB Through Hole 3 - Single 1 250 - 100 V 3 V
RS-stocknr. 688-9408
FabrikantnummerMC1413BDG
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NPN 500 mA 50 V 5 V SOIC Surface Mount 16 - Common Emitter 7 1000 - - 1.6 V