# Smart high-side switch

Canonical URL: https://eloragrid.ai/symbols/smart-high-side-switch
Publisher: Elora Grid
Updated: 2026-10-27
Lookup label: HS SW
Drawing use: Schematic
Reference families: Manufacturer

A high-side switch controls the connection between a supply and the high side of a load.

## In plain English

### What does Smart high-side switch mean?

A high-side switch controls the connection between a supply and the high side of a load.

### A simple example

A controller can switch the positive supply path to an attached device using the selected component.

### What the drawings help you do

Draw the switch between the positive supply and the load, with the return path shown separately. Identify any diagnostic output as a signal rather than another power connection. The word smart does not define a universal set of protection or diagnostic features.

### Before using this reference

- Locate the switch on the supply side of the load.
- Label control and diagnostic signals separately.
- Reference the selected load, fault and thermal behaviour.

### What makes this different from a low-side switch?

The location in the circuit differs. A high-side switch controls the supply-side path; a low-side switch controls the return-side path. Their drive and load-reference arrangements must match the selected circuit.

### Terms

- High side: The supply-side connection of the selected load circuit.
- Diagnostic output: A signal reporting a device condition for a controller to interpret.

Concept diagram: Positive supply path → Controlled high-side switch → Load supply connection
Original functional explanation. Arrows show information or energy roles; two-headed arrows identify two-way interfaces. This is not a pinout, certified standards graphic or complete circuit.

- [High-side power switching](https://www.ti.com/product-category/power-management/high-side-switches-controllers/overview.html)


## What it represents

A high-side switch controls the connection between a supply and the high side of a load.
A controller can switch the positive supply path to an attached device using the selected component.
Draw the switch between the positive supply and the load, with the return path shown separately. Identify any diagnostic output as a signal rather than another power connection. The word smart does not define a universal set of protection or diagnostic features. This is original functional artwork, not a certified standard graphic or device pinout.

## How to read it

- Locate the switch on the supply side of the load.
- Label control and diagnostic signals separately.
- Reference the selected load, fault and thermal behaviour.
- Monitoring and protection features depend on the chosen device, not merely the high-side position.

## Information to show or reference

- Locate the switch on the supply side of the load.
- Label control and diagnostic signals separately.
- Reference the selected load, fault and thermal behaviour.

## Important distinction

Monitoring and protection features depend on the chosen device, not merely the high-side position.

## Facts

- Representation type: Original functional block; not a certified IEC or IEEE graphic
- Concept input: Positive supply path
- Concept output: Load supply connection

## Public references

- [High-side power switching](https://www.ti.com/product-category/power-management/high-side-switches-controllers/overview.html) — Texas Instruments. High-side power switching: public technical context for the named function. Product and compliance details remain with the publisher.

## 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.