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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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庫存編號 166-2225
製造零件編號MMBTA28
TWD3.20
個 (在毎卷:3000)
單位
NPN 800 mA 80 V 12 V SOT-23 Surface Mount 3 - Single 1 10000 - 80 V 1.5 V
RS庫存編號 807-4731
製造零件編號MMBTA28
TWD10.00
Each (On a Tape of 50)
單位
NPN 800 mA 80 V 12 V SOT-23 Surface Mount 3 - Single 1 10000 - 80 V 1.5 V
RS庫存編號 163-0785
製造零件編號NJD35N04T4G
TWD13.70
個 (在毎卷:2500)
單位
NPN 4 A 350 V 5 V DPAK (TO-252) Surface Mount 3 - Single 1 2000 2 V 700 V 1.5 V
RS庫存編號 805-4412
製造零件編號NJD35N04G
TWD27.20
/個 (每包:25個)
單位
NPN 4 A 350 V 5 V DPAK (TO-252) Surface Mount 3 - Single 1 300 2 V 700 V 1.5 V
RS庫存編號 145-2940
製造零件編號NJD35N04G
TWD27.20
毎管:75 個
單位
NPN 4 A 350 V 5 V DPAK (TO-252) Surface Mount 3 - Single 1 300 2 V 700 V 1.5 V
RS庫存編號 806-5046
製造零件編號NJD35N04T4G
TWD26.60
Each (On a Tape of 25)
單位
NPN 4 A 350 V 5 V DPAK (TO-252) Surface Mount 3 - Single 1 2000 2 V 700 V 1.5 V
RS庫存編號 773-7743
製造零件編號MC1413BDR2G
TWD16.50
Each (On a Tape of 10)
單位
NPN 500 mA 50 V 5 V SOIC Surface Mount 16 - Common Emitter 7 1000 - - 1.6 V
RS庫存編號 688-9408
製造零件編號MC1413BDG
TWD19.80
/個 (每包:5個)
單位
NPN 500 mA 50 V 5 V SOIC Surface Mount 16 - Common Emitter 7 1000 - - 1.6 V
RS庫存編號 178-4725
製造零件編號MC1413BDG
TWD7.00
毎管:48 個
單位
- - - - - - - - - - - - - -
RS庫存編號 163-0972
製造零件編號MMBTA63LT1G
TWD1.10
個 (在毎卷:3000)
單位
PNP -500 mA 30 V -10 V SOT-23 Surface Mount 3 - Single 2 5000 - -30 V -1.5 V
RS庫存編號 178-7560
製造零件編號MC1413BDR2G
TWD6.90
個 (在毎卷:2500)
單位
- - - - - - - - - - - - - -
RS庫存編號 781-4285
製造零件編號MMBTA63LT1G
TWD2.00
/個 (每包:100個)
單位
PNP -500 mA 30 V -10 V SOT-23 Surface Mount 3 - Single 2 5000 - -30 V -1.5 V
RS庫存編號 125-0063
製造零件編號MJ11032G
TWD334.90
Each (In a Tray of 100)
單位
NPN 50 A 120 V 5 V TO-204 Through Hole 2 - Single 1 400 4.5 V 120 V 3.5 V
RS庫存編號 671-1153
製造零件編號MMBTA13
TWD6.10
/個 (每包:20個)
單位
NPN 1.2 A 30 V 10 V SOT-23 Surface Mount 3 - Single 1 5000 - 30 V 1.5 V
RS庫存編號 163-1230
製造零件編號TIP122G
TWD21.90
毎管:50 個
單位
NPN 8 A 100 V 5 V TO-220 Through Hole 3 - Single 1 1000 - 100 V 4 V
RS庫存編號 774-3209
製造零件編號MJ11032G
TWD477.00
單位
NPN 50 A 120 V 5 V TO-204 Through Hole 2 - Single 1 400 4.5 V 120 V 3.5 V
RS庫存編號 166-1813
製造零件編號MMBTA13
TWD1.10
個 (在毎卷:3000)
單位
NPN 1.2 A 30 V 10 V SOT-23 Surface Mount 3 - Single 1 5000 - 30 V 1.5 V
RS庫存編號 781-4279
製造零件編號MMBTA13LT1G
TWD2.10
/個 (每包:100個)
單位
NPN 300 mA 30 V 10 V SOT-23 Surface Mount 3 - Single 2 5000 1.5 V 30 V 1.5 V
RS庫存編號 122-0139
製造零件編號MJ11033G
TWD435.80
Each (In a Tray of 100)
單位
PNP 50 A 120 V 5 V TO-204 Through Hole 2 - Single 1 400 4.5 V 120 V 3.5 V
RS庫存編號 790-5407
製造零件編號MJH6284G
TWD143.00
/個 (每包:2個)
單位
NPN 20 A 100 V 5 V TO-247 Through Hole 3 - Single 1 100 4 V 100 V 3 V