PNP
PNP bipolar transistor
A bipolar transistor with base, collector and emitter terminals arranged for PNP operation.
Schematic
Symbols · NPN
NPN bipolar transistor
A bipolar transistor with base, collector and emitter terminals arranged for NPN operation.
Schematic · NPN
What it represents
A bipolar transistor with base, collector and emitter terminals arranged for NPN operation.
On a schematic, identify the base drive, collector node and emitter reference and trace the switched or amplified collector circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.
The emitter arrow distinguishes NPN from PNP in common schematics; the package pin order must still come from the selected part.
Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing.
How to read it
- Identify the base drive, collector node and emitter reference.
- Trace the switched or amplified collector circuit.
Information to show or reference
- Label the base drive, collector node and emitter reference.
- Cross-reference the switched or amplified collector circuit.
- Add the selected device or circuit documentation revision, power/reference connections and project signal convention.
A distinction that matters
The emitter arrow distinguishes NPN from PNP in common schematics; the package pin order must still come from the selected part.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
BC847 NPN 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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