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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제품설명 단가 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 제품 번호 125-0077
제조사 부품 번호MJF122G
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₩982.70
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NPN 8 A 100 V 5 V TO-220FP Through Hole 3 - Single 1 1000 - 100 V 3.5 V dc
RS 제품 번호 109-090
제조사 부품 번호BD680
₩1,133.05
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PNP 4 A 80 V 5 V SOT-32 Through Hole 3 - Single 1 750 - 80 V 2.5 V
RS 제품 번호 145-0190
제조사 부품 번호ULN2003APW
₩609.15
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NPN 500 mA 50 V - TSSOP Surface Mount 16 - Common Emitter 7 - - - 1.6 V
RS 제품 번호 168-6162
제조사 부품 번호TIP107
₩764.15
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PNP 8 A 100 V 5 V TO-220 Through Hole 3 - Single 1 200 - 100 V 2.5 V
RS 제품 번호 795-7518
제조사 부품 번호BDW94CFP
₩2,213.40
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PNP 12 A 100 V - TO-220FP Through Hole 3 - Single 1 100 4 V 100 V 3 V
RS 제품 번호 186-7435
제조사 부품 번호TIP100G
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₩933.10
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NPN 5 A dc 60 V dc 5 V dc TO-220 Through Hole 3 Single Single 1 200 - 60 V dc 2.5 V dc
RS 제품 번호 166-2821
제조사 부품 번호PZTA64
제조사ON Semiconductor
₩142.60
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PNP -1.2 A 30 V -10 V SOT-223 Surface Mount 3 + Tab - Single 1 10000 -2 V -30 V -1.5 V
RS 제품 번호 792-0914
제조사 부품 번호BST62,115
제조사Nexperia
₩637.05
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PNP -1 A 80 V -5 V SOT-89 Surface Mount 3 - Single 1 1000 -1.9 V -90 V -1.3 V
RS 제품 번호 922-7948
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NPN 900 mA 100 V 12 V SOT-23 Surface Mount 3 - Single 1 5000 1.65 V 120 V 0.96 V
RS 제품 번호 166-2822
제조사 부품 번호PZTA14
제조사ON Semiconductor
₩182.90
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NPN 1.2 A 30 V 10 V SOT-223 Surface Mount 3 + Tab - Single 1 10000 2 V 30 V 1.5 V
RS 제품 번호 751-3531
제조사 부품 번호BCV47TA
제조사DiodesZetex
₩120.90
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NPN 500 mA 60 V 10 V SOT-23 Surface Mount 3 - Single 1 2000 1.5 V 80 V 1 V
RS 제품 번호 168-6163
제조사 부품 번호TIP115
₩891.25
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PNP 2 A 60 V 5 V TO-220 Through Hole 3 - Single 1 500 - 60 V 2.5 V
RS 제품 번호 178-4760
제조사 부품 번호2N6045G
제조사ON Semiconductor
₩844.75
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- - - - - - - - - - - - - -
RS 제품 번호 166-1922
제조사 부품 번호MMBTA14
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₩48.05
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NPN 1.2 A 30 V 10 V SOT-23 Surface Mount 3 - Single 1 20000 - 30 V 1.5 V
RS 제품 번호 124-5436
제조사 부품 번호TIP127G
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₩785.85
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PNP 5 A 100 V 5 V TO-220AB Through Hole 3 - Single 1 1000 - 100 V 4 V
RS 제품 번호 102-4100
제조사 부품 번호TIP121
₩615.35
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NPN 5 A 80 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 80 V 4 V
RS 제품 번호 122-2358
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NPN 1 A 120 V 10 V SOT-89 Surface Mount 3 - Single 1 5000 1.8 V 140 V 1.5 V
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NPN 8 A 80 V 5 V TO-220 Through Hole 3 - Single 1 750 2.5 V 80 V 2 V
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NPN 500 mA 30 V 10 V TO-92 Through Hole 3 - Single 1 5000 - 30 V 1.5 V
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