{"schemaVersion":1,"slug":"iec-pnp-phototransistor-photosensitive-pnp-transistor","name":"IEC PNP phototransistor: photosensitive pnp transistor","kind":"symbol","abbreviation":"PNP PHOTO","aliases":["HDV1B6","VDV1B6","PNP phototransistor Photosensitive PNP Transistor"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"PNP phototransistor form: Photosensitive PNP Transistor.","description":["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."],"readingNotes":["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."],"drawingChecklist":["Identify terminal polarity and the required bias region.","Reference the selected component characteristics and package pinout.","Show the surrounding bias and signal-conditioning network."],"distinction":"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.","facts":[{"label":"Drawing form","value":"Photosensitive PNP Transistor"},{"label":"Public vendor block names","value":"HDV1B6 / VDV1B6. Autodesk identifiers, not standards database IDs."},{"label":"Drawing purpose","value":"PNP phototransistor"},{"label":"Graphic scope","value":"Independently authored educational illustration; not certified standard geometry, a terminal pinout or a product footprint."}],"references":[{"sourceId":"pub-symbol-semiconductors","relevance":"Public Semiconductor Components table explicitly lists HDV1B6 / VDV1B6 with this operating or connection form. Vendor graphics are linked, not copied."}],"related":["diode","photodiode","npn-phototransistor"],"artwork":"s28-iec-pnp-phototransistor-photosensitive-pnp-transistor","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Photosensitive PNP Transistor","reference":"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."},"plainEnglish":{"title":"What does IEC PNP phototransistor: photosensitive pnp transistor mean?","introduction":"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.","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. ","drawings":"A PNP phototransistor is different from a photodiode: its transistor action adds current gain, with different speed and bias requirements.","terms":[{"name":"Terminal","meaning":"An identified point where a conductor connects."},{"name":"Signal","meaning":"Electrical information passed between devices, rather than necessarily the main power supply."},{"name":"Rating","meaning":"A value stating the conditions for which equipment is specified."}],"diagram":"flow","steps":["Identify the device and form","Read the connections and state","Check the equipment reference"],"caption":"A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.","sources":[{"label":"AutoCAD Electrical: Semiconductor components","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-AC954072-7314-4682-88AF-38160D61E9A2.htm"}],"detail":"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.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/iec-pnp-phototransistor-photosensitive-pnp-transistor","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/iec-pnp-phototransistor-photosensitive-pnp-transistor.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pub-symbol-semiconductors","title":"AutoCAD Electrical: Semiconductor components","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-AC954072-7314-4682-88AF-38160D61E9A2.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Public Semiconductor Components table explicitly lists HDV1B6 / VDV1B6 with this operating or connection form. Vendor graphics are linked, not copied."}]}