D
Diode
A diode provides a semiconductor path with documented directional conduction characteristics.
Schematic
IEC · PNP PHOTO
IEC PNP phototransistor: photosensitive pnp transistor
PNP phototransistor form: Photosensitive PNP Transistor.
In plain English
What does IEC PNP phototransistor: photosensitive pnp transistor mean?
A PNP phototransistor uses incident light to control a PNP transistor current path. The emitter arrow and supply orientation distinguish it from the NPN form. This entry identifies the photosensitive pnp transistor form in the publisher's IEC-context family.
A simple example
A light-sensitive input stage can feed a conditioning circuit without a separately driven base connection. Check the emitter and collector assignments before following the measurement current.
What the drawings help you do
A PNP phototransistor is different from a photodiode: its transistor action adds current gain, with different speed and bias requirements.
This particular reference
PNP phototransistor form: Photosensitive PNP Transistor. This entry adds the photosensitive pnp transistor detail to the broader PNP phototransistor family. A PNP phototransistor is different from a photodiode: its transistor action adds current gain, with different speed and bias requirements.
- Terminal
- An identified point where a conductor connects.
- Signal
- Electrical information passed between devices, rather than necessarily the main power supply.
- Rating
- A value stating the conditions for which equipment is specified.
Read the source: AutoCAD Electrical: Semiconductor components
IEC · Photosensitive PNP Transistor
Autodesk IEC-60617 Symbol Preview: Semiconductor Components, HDV1B6 / VDV1B6. This identifies the publisher's library context; exact IEC graphics and database identities are not asserted.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
Schematic · PNP PHOTO
What it represents
A PNP phototransistor uses incident light to control a PNP transistor current path. The emitter arrow and supply orientation distinguish it from the NPN form. This entry identifies the photosensitive pnp transistor form in the publisher's IEC-context family.
A light-sensitive input stage can feed a conditioning circuit without a separately driven base connection. Check the emitter and collector assignments before following the measurement current.
A PNP phototransistor is different from a photodiode: its transistor action adds current gain, with different speed and bias requirements.
How to read it
- A light-sensitive input stage can feed a conditioning circuit without a separately driven base connection. Check the emitter and collector assignments before following the measurement current.
- A PNP phototransistor is different from a photodiode: its transistor action adds current gain, with different speed and bias requirements.
Information to show or reference
- Identify terminal polarity and the required bias region.
- Reference the selected component characteristics and package pinout.
- Show the surrounding bias and signal-conditioning network.
A distinction that matters
This entry adds the photosensitive pnp transistor detail to the broader PNP phototransistor family. A PNP phototransistor is different from a photodiode: its transistor action adds current gain, with different speed and bias requirements.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
AutoCAD Electrical: Semiconductor components
Public Semiconductor Components table explicitly lists HDV1B6 / VDV1B6 with this operating or connection form. Vendor graphics are linked, not copied.
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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