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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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
THB39.642
Each (On a Reel of 1000)
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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
THB71.864
Each: (In a Pack of 5)
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NPN + PNP 500 mA 50 V - SOIC W Surface Mount 20 - - 8 - - - 2 V
RS Stock No. 714-1167
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2803A
THB34.848
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
THB29.577
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. 109-084
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BD679
Brand :Magnatec
THB11.68
Each
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NPN 4 A 80 V 5 V SOT-32 Through Hole 3 - Single 1 750 - 80 V 2.5 V
RS Stock No. 100-3837
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003AN
THB15.984
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
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THB19.28
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NPN 500 mA 50 V 50 V PDIP Through Hole 16 - Common Emitter 7 - - - 1.6 V
RS Stock No. 103-1078
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TIP122
THB15.376
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NPN 8 A 100 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 100 V 4 V
RS Stock No. 686-8209
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003A
THB10.782
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. 168-6450
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003A
THB12.005
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. 102-4091
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TIP142
THB46.731
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. 125-0063
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MJ11032G
THB303.753
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. 774-3209
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MJ11032G
THB399.41
Each
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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. 486-0294
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TIP142
THB55.204
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. 103-5146
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TIP120G
THB15.248
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
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.TIP120G
THB15.288
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. 122-0071
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MJ11016G
THB150.708
Each (In a Tray of 100)
Units
NPN 30 A 120 V 5 V TO-204 Through Hole 3 - Single 1 200 5 V 120 V 4 V
RS Stock No. 671-1125
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BCV27
THB6.331
Each: (In a Pack of 25)
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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. 166-1955
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BCV27
THB1.34
Each (On a Reel of 3000)
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. 858-196
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ULN2003AD
THB18.31
Each
Units
NPN 500 mA 50 V 50 V SOIC Surface Mount 16 - Common Emitter 7 - - - 1.6 V
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