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. 739-0344
Mfr. Part No.KSP13BU
kr 2,313
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. 166-2727
Mfr. Part No.KSP13BU
kr 0,322
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. 124-1409
Mfr. Part No.TIP126TU
kr 5,482
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. 790-5315
Mfr. Part No.MJD112-1G
kr 4,772
Each (In a Pack of 15)
Units
NPN 2 A 100 V 5 V IPAK (TO-251) Through Hole 3 - Single 1 1000 4 V 100 V 3 V
RS Stock No. 903-4103
Mfr. Part No.BC516_D27Z
kr 0,396
Each (In a Pack of 100)
Units
PNP -1 A 30 V -10 V TO-92 Through Hole 3 - Single 1 30000 - -40 V -1 V
RS Stock No. 808-0512
Mfr. Part No.TIP126TU
kr 6,026
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. 178-4811
Mfr. Part No.MJD112-1G
kr 4,407
Each (In a Tube of 75)
Units
- - - - - - - - - - - - - -
RS Stock No. 774-3653
Mfr. Part No.TIP120G
kr 5,085
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. 808-0502
Mfr. Part No.TIP120TU
kr 7,569
Each (In a Pack of 25)
Units
NPN 8 A 60 V 5 V TO-220 Through Hole 3 - Single 2 1000 - 60 V 4 V
RS Stock No. 103-5146
Mfr. Part No.TIP120G
kr 4,622
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. 145-4629
Mfr. Part No.TIP120TU
kr 6,879
Each (In a Tube of 50)
Units
NPN 8 A 60 V 5 V TO-220 Through Hole 3 - Single 2 1000 - 60 V 4 V
RS Stock No. 790-5397
Mfr. Part No.MJH11022G
kr 28,565
Each (In a Pack of 2)
Units
NPN 15 A 250 V 5 V TO-247 Through Hole 3 - Single 1 100 3.8 V 250 V 4 V
RS Stock No. 163-2365
Mfr. Part No.BD679AG
kr 2,006
Each (In a Box of 500)
Units
NPN 4 A 80 V 5 V TO-225 Through Hole 3 - Single 1 750 - 80 V 2.8 V
RS Stock No. 124-5325
Mfr. Part No.MJH11022G
kr 24,287
Each (In a Tube of 30)
Units
NPN 15 A 250 V 5 V TO-247 Through Hole 3 - Single 1 100 3.8 V 250 V 4 V
RS Stock No. 103-2945
Mfr. Part No.BU323ZG
kr 19,737
Each (In a Tube of 30)
Units
NPN 10 A 350 V 6 V TO-247 Through Hole 3 - Single 1 150 2.2 V - 1.6 V
RS Stock No. 545-2349
Mfr. Part No.BD679AG
kr 2,16
Each (In a Pack of 5)
Units
NPN 4 A 80 V 5 V TO-225 Through Hole 3 - Single 1 750 - 80 V 2.8 V
RS Stock No. 103-2942
Mfr. Part No.BD675AG
kr 2,769
Each (In a Box of 500)
Units
NPN 4 A 45 V 5 V TO-225 Through Hole 3 - Single 1 750 - 45 V 2.8 V
RS Stock No. 545-0090
Mfr. Part No.BD675AG
kr 5,58
Each
Units
NPN 4 A 45 V 5 V TO-225 Through Hole 3 - Single 1 750 - 45 V 2.8 V
RS Stock No. 545-0157
Mfr. Part No.BU323ZG
kr 24,83
Each
Units
NPN 10 A 350 V 6 V SOT-93 Through Hole 3 - Single 1 150 2.2 V - 1.6 V
RS Stock No. 792-4694
Mfr. Part No.MJF122G
kr 7,078
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