PNP Darlington Pair
Transistors
·
Generic
·
Curated by CircuitSim
Details
Manufacturer
Generic
Part number
—
Pins
3
Used in
No circuits
Added
Aug 2026
About this component
Generic three-terminal PNP Darlington pair built from two cascaded bipolar transistors for high current gain and high-side switching.
Parameters
Advanced
12 parameters
SATURATIONCURRENT
Transport saturation current
Sets the transport saturation current of each transistor in the pair.
1e-15 A
FORWARDBETA
Forward current gain per transistor
Sets the maximum forward current gain of each transistor; the pair gain is substantially higher.
100
FORWARDEMISSIONCOEFFICIENT
Forward emission coefficient
Sets the forward-current ideality factor of each transistor.
1
EARLYVOLTAGE
Forward Early voltage
Controls output conductance in the forward-active region.
100 V
REVERSEBETA
Reverse current gain
Sets the reverse current gain of each transistor.
1
BASERESISTANCE
Base resistance
Sets the ohmic base resistance of each transistor.
10 Ω
COLLECTORRESISTANCE
Collector resistance
Sets the ohmic collector resistance of each transistor.
1 Ω
EMITTERRESISTANCE
Emitter resistance
Sets the ohmic emitter resistance of each transistor.
0.1 Ω
BASEEMITTERCAPACITANCE
Base-emitter capacitance
Sets the zero-bias base-emitter depletion capacitance of each transistor.
10p F
BASECOLLECTORCAPACITANCE
Base-collector capacitance
Sets the zero-bias base-collector depletion capacitance of each transistor.
5p F
FORWARDTRANSITTIME
Forward transit time
Sets the ideal forward transit time of each transistor.
400p s
REVERSETRANSITTIME
Reverse transit time
Sets the ideal reverse transit time of each transistor.
50n s
Pins
Pins
3 pins
1
C
Collector terminal shared by both PNP transistors.
2
B
Base input; drive below the emitter through a current-limiting or bias network to turn the pair on.
3
E
Emitter output terminal of the second PNP transistor.
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