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).

...
Read more Read less

Filters

Viewing 81 - 100 of 506 products
Results per page
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 Stock No. 169-8767
Mfr. Part No.TIP147TTU
HK$7.47
Each (In a Tube of 50)
units
PNP -10 A 100 V -5 V TO-220 Through Hole 3 - Single 2 500 -3.5 V -100 V -2 V
RS Stock No. 102-4098
Mfr. Part No.BD677
HK$2.802
Each (In a Tube of 50)
units
NPN 4 A 60 V 5 V SOT-32 Through Hole 3 - Single 1 750 - 60 V 2.5 V
RS Stock No. 109-084
Mfr. Part No.BD679
BrandMagnatec
HK$3.52
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. 128-8848
Mfr. Part No.BA12004BF-E2
BrandROHM
HK$4.216
Each (In a Pack of 25)
units
NPN - 60 V - SOP Surface Mount 16 Array 7 Common Emitter 7 1000 - - 1.6 V
RS Stock No. 186-7435
Mfr. Part No.TIP100G
HK$6.021
Each (In a Tube of 50)
units
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 Stock No. 805-4412
Mfr. Part No.NJD35N04G
HK$6.60
Each (In a Pack of 25)
units
NPN 4 A 350 V 5 V DPAK (TO-252) Surface Mount 3 - Single 1 300 2 V 700 V 1.5 V
RS Stock No. 186-8195
Mfr. Part No.TIP110G
HK$4.728
Each (In a Pack of 25)
units
NPN 5 A dc 60 V dc 5 V dc TO-220 Through Hole 3 Single Single 1 500 - 60 V dc 2.5 V dc
RS Stock No. 186-7344
Mfr. Part No.2N6387G
HK$6.47
Each (In a Tube of 50)
units
NPN 10 A dc 60 V dc 5 V dc TO-220 Through Hole 3 Single Single 1 1000 - 60 V dc 3 V dc
RS Stock No. 168-5844
Mfr. Part No.ULN2074B
HK$20.02
Each (In a Tube of 25)
units
NPN 1.75 A 50 V - PDIP Through Hole 16 - Common Emitter 4 - - - 1.4 V
RS Stock No. 121-8459
Mfr. Part No.ULN2004AN
HK$4.738
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. 686-8203
Mfr. Part No.ULN2004A
HK$3.822
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. 166-1531
Mfr. Part No.BST50,115
BrandNexperia
HK$2.599
Each (On a Reel of 1000)
units
NPN 1 A 45 V 5 V UPAK Surface Mount 4 - Single 1 1000 1.9 V 60 V 1.3 V
RS Stock No. 669-7304
Mfr. Part No.FZT705TA
HK$5.87
Each (In a Pack of 10)
units
PNP 2 A 120 V 10 V SOT-223 Surface Mount 3 + Tab - Single 1 2000 1.8 V 140 V 2.5 V
RS Stock No. 169-8764
Mfr. Part No.TIP121TU
HK$4.75
Each (In a Tube of 50)
units
NPN 8 A 80 V 5 V TO-220 Through Hole 3 - Single 2 1000 - 80 V 4 V
RS Stock No. 154-986
Mfr. Part No.FZT600TA
HK$4.913
Each (In a Pack of 10)
units
NPN 2 A 140 V 10 V SOT-223 Surface Mount 3 + Tab - Single 1 1000 1.9 V 160 V 1.2 V
RS Stock No. 920-8988
Mfr. Part No.ULN2065B
HK$20.37
Each (In a Tube of 25)
units
NPN 1.75 A 80 V - PDIP Through Hole 16 - Common Emitter 4 - - - 1.5 V
RS Stock No. 163-1232
Mfr. Part No.TIP142G
HK$12.75
Each (In a Tube of 30)
units
NPN 10 A 100 V 5 V TO-247 Through Hole 3 - Single 1 500 3.5 V 100 V 3 V
RS Stock No. 178-7525
Mfr. Part No.BSP52T1G
HK$0.967
Each (On a Reel of 1000)
units
- - - - - - - - - - - - - -
RS Stock No. 774-3439
Mfr. Part No.2N6045G
HK$6.59
Each (In a Pack of 5)
units
NPN 8 A 100 V 5 V TO-220AB Through Hole 3 - Single 1 100 4.5 V 100 V 2 V
RS Stock No. 781-4288
Mfr. Part No.MMBTA13LT3G
HK$0.531
Each (On a Tape of 100)
units
NPN 300 mA 30 V 10 V SOT-23 Surface Mount 3 - Single 2 5000 1.5 V 30 V 1.5 V
Related Products
Lower handle effort reduces operator fatigueFully serviceableHigh-strength beam ...
Description:
Lower handle effort reduces operator fatigueFully serviceableHigh-strength beam and pump linkage for long lifePumping handle included on all modelsSafety relief valve to prevent overloadAutomatic by-pass port to prevent over-extensionWiper seal for extended lifeThick base material with large area for increased ...
Lower handle effort reduces operator fatigueFully serviceableHigh-strength beam ...
Description:
Lower handle effort reduces operator fatigueFully serviceableHigh-strength beam and pump linkage for long lifePumping handle included on all modelsSafety relief valve to prevent overloadAutomatic by-pass port to prevent over-extensionWiper seal for extended lifeThick base material with large area for increased ...
Lower handle effort reduces operator fatigueFully serviceableHigh-strength beam ...
Description:
Lower handle effort reduces operator fatigueFully serviceableHigh-strength beam and pump linkage for long lifePumping handle included on all modelsSafety relief valve to prevent overloadAutomatic by-pass port to prevent over-extensionWiper seal for extended lifeThick base material with large area for increased ...
Lower handle effort reduces operator fatigueFully serviceableHigh-strength beam ...
Description:
Lower handle effort reduces operator fatigueFully serviceableHigh-strength beam and pump linkage for long lifePumping handle included on all modelsSafety relief valve to prevent overloadAutomatic by-pass port to prevent over-extensionWiper seal for extended lifeThick base material with large area for increased ...