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. 100-3837
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003AN
THB16.958
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. 436-8451
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003AN
THB17.74
Each
Units
NPN 500 mA 50 V 50 V PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 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. 121-8478
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003AD
THB11.712
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. 665-8699
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003ADR
THB16.16
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. 858-196
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003AD
THB19.43
Each
Units
NPN 500 mA 50 V 50 V SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 866-0196
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2803ADW
THB39.44
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. 646-6311
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2803ADW
THB47.70
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. 923-6661
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003AID
THB14.08
Each (In a Tube of 40)
Units
NPN 500 mA 50 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 665-9197
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003AID
THB14.08
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. 709-2879
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SN75469NE4
THB34.362
Each: (In a Pack of 5)
Units
NPN 500 mA 100 V - PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 178-9082
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SN75469NE4
THB41.76
Each (In a Tube of 25)
Units
- - - - - - - - - - - - - -
RS Stock No. 858-203
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2004AD
THB19.86
Each
Units
NPN 500 mA 50 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 121-8479
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2004AD
THB14.196
Each (In a Tube of 40)
Units
NPN 500 mA 50 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 652-825
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2004AN
THB17.93
Each
Units
NPN 500 mA 50 V 50 V PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 121-8459
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2004AN
THB17.346
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. 162-6796
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003V12DR
THB8.448
Each (On a Reel of 2500)
Units
NPN 140 mA 20 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 0.75 V
RS Stock No. 145-0189
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.SN75469D
THB23.406
Each (In a Tube of 40)
Units
NPN 500 mA 100 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 162-7586
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2004AID
THB20.53
Each (In a Tube of 40)
Units
NPN 500 mA 50 V - SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 732-0887
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003AIN
THB23.534
Each: (In a Pack of 5)
Units
NPN 500 mA 50 V - PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V