PNP
PNP bipolar transistor
A bipolar transistor with base, collector and emitter terminals arranged for PNP operation.
Schematic
Symbols · PNP-DAR
PNP Darlington transistor
Two PNP transistor stages connected as a compound current-amplifying device.
Schematic · PNP-DAR
What it represents
Two PNP transistor stages connected as a compound current-amplifying device.
On a schematic, identify the common collector, input base and output emitter polarity and trace the high-side or amplification circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.
A PNP Darlington has opposite operating polarity to an NPN pair; gain alone does not define an interchangeable device.
The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing.
How to read it
- Identify the common collector, input base and output emitter polarity.
- Trace the high-side or amplification circuit.
Information to show or reference
- Label the common collector, input base and output emitter polarity.
- Cross-reference the high-side or amplification circuit.
- Add the selected device or circuit documentation revision, power/reference connections and project signal convention.
A distinction that matters
A PNP Darlington has opposite operating polarity to an NPN pair; gain alone does not define an interchangeable device.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
TIP120/TIP125 complementary Darlington transistor documentation
Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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