# Unidirectional TVS diode

Canonical URL: https://eloragrid.ai/symbols/unidirectional-tvs-diode
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: TVS
Drawing use: Schematic
Reference families: Manufacturer

A transient-suppression diode intended to clamp a documented surge polarity across a protected circuit.

## What it represents

A transient-suppression diode intended to clamp a documented surge polarity across a protected circuit.
On a schematic, identify cathode orientation and the protected supply/signal node and trace the transient diversion path and return conductor. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.
A TVS clamping rating is not the normal working voltage; unidirectional and bidirectional devices have different polarity behaviour.
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 cathode orientation and the protected supply/signal node.
- Trace the transient diversion path and return conductor.

## Information to show or reference

- Label cathode orientation and the protected supply/signal node.
- Cross-reference the transient diversion path and return conductor.
- Add the selected device or circuit documentation revision, power/reference connections and project signal convention.

## Important distinction

A TVS clamping rating is not the normal working voltage; unidirectional and bidirectional devices have different polarity behaviour.

## Facts

- Common schematic mnemonic: TVS — descriptive only; project/device documentation defines reference designations.
- Terminal / interface focus: Cathode orientation and the protected supply/signal node
- Artwork scope: Original educational component glyph; not a certified standard graphic or package pinout.

## Public references

- [ESD protection and TVS device families](https://www.nexperia.com/products/esd-protection-tvs-filtering-and-signal-conditioning) — Nexperia. 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.