# Photodiode optocoupler

Canonical URL: https://eloragrid.ai/symbols/photodiode-optocoupler
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: OPTO-PD
Drawing use: Schematic
Reference families: Manufacturer

An optically coupled component using photodiode output sensing for an isolation or feedback arrangement.

## What it represents

An optically coupled component using photodiode output sensing for an isolation or feedback arrangement.
On a schematic, identify the emitter drive, detector terminals and feedback/output channels and trace the isolated analogue signal and amplifier circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.
A photodiode-output optocoupler needs its detector/amplifier arrangement; it is not a transistor-output switch with the same pins.
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 emitter drive, detector terminals and feedback/output channels.
- Trace the isolated analogue signal and amplifier circuit.

## Information to show or reference

- Label the emitter drive, detector terminals and feedback/output channels.
- Cross-reference the isolated analogue signal and amplifier circuit.
- Add the selected device or circuit documentation revision, power/reference connections and project signal convention.

## Important distinction

A photodiode-output optocoupler needs its detector/amplifier arrangement; it is not a transistor-output switch with the same pins.

## Facts

- Common schematic mnemonic: OPTO-PD — descriptive only; project/device documentation defines reference designations.
- Terminal / interface focus: The emitter drive, detector terminals and feedback/output channels
- Artwork scope: Original educational functional/circuit reference; not a selected product pinout.

## Public references

- [IL300 linear photodiode optocoupler documentation](https://www.vishay.com/docs/83622/il300.pdf) — Vishay. Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.