Darlington Pairs

Darlington pairs, also known as Darlington Transistors are discrete semiconductor devices consisting of a package of two standard BJT transistors (bipolar junction transistor). One of the transistors is high-gain while the other is high current. RS Components offer a wide range of high-quality Darlington Transistors from leading brands including ON Semiconductor, STMicroelectronics, Texas Instruments and Nexperia.

How do they work?

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

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 (PCB) printed circuit board.

What applications would 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.

What are the 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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รายละเอียดสินค้า / Description ราคา / 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. 177-5536
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.A2982SLWTR-T
THB54.439
Each (On a Reel of 1000)
Units
NPN + PNP 500 mA 50 V - SOIC W Surface Mount 20 - - 8 - - - 2 V
RS Stock No. 680-7220
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.A2982SLWTR-T
THB87.60
Each: (In a Pack of 5)
Units
NPN + PNP 500 mA 50 V - SOIC W Surface Mount 20 - - 8 - - - 2 V
RS Stock No. 714-1167
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2803A
THB59.576
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
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2803A
THB53.593
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. 103-1078
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TIP122
THB21.767
Each (In a Tube of 50)
Units
NPN 8 A 100 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 100 V 4 V
RS Stock No. 100-3837
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003AN
THB21.90
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. 109-084
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BD679
Brand :Magnatec
THB19.87
Each
Units
NPN 4 A 80 V 5 V SOT-32 Through Hole 3 - Single 1 750 - 80 V 2.5 V
RS Stock No. 436-8451
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003AN
THB32.81
Each
Units
NPN 500 mA 50 V 50 V PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 168-6450
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003A
THB20.853
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
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003A
THB21.79
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. 125-0063
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MJ11032G
Brand :onsemi
THB345.503
Each (In a Tray of 100)
Units
NPN 50 A 120 V 5 V TO-204 Through Hole 2 - Single 1 400 4.5 V 120 V 3.5 V
RS Stock No. 102-4091
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TIP142
THB61.761
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. 486-0294
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TIP142
THB73.028
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. 774-3209
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MJ11032G
Brand :onsemi
THB445.48
Each
Units
NPN 50 A 120 V 5 V TO-204 Through Hole 2 - Single 1 400 4.5 V 120 V 3.5 V
RS Stock No. 103-5146
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TIP120G
Brand :onsemi
THB24.99
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. 774-3653
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TIP120G
Brand :onsemi
THB25.788
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. 121-8478
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003AD
THB18.511
Each (In a Tube of 40)
Units
NPN 500 mA 50 V 50 V SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 671-1125
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BCV27
Brand :onsemi
THB9.334
Each: (In a Pack of 25)
Units
NPN 1.2 A 30 V 10 V SOT-23 Surface Mount 3 - Single 1 4000 1.5 V 40 V 1 V
RS Stock No. 922-2987
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003ADR
THB8.254
Each (On a Reel of 2500)
Units
NPN 500 mA 50 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 463-000
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MJ11016G
Brand :onsemi
THB316.44
Each: (In a Pack of 2)
Units
NPN 30 A 120 V 5 V TO-204 Through Hole 3 - Single 1 200 5 V 120 V 4 V