# Power-source multiplexer

Canonical URL: https://eloragrid.ai/symbols/power-source-multiplexer
Publisher: Elora Grid
Updated: 2026-10-27
Lookup label: PWR MUX
Drawing use: Schematic
Reference families: Manufacturer

A power multiplexer selects between defined supply paths feeding an output.

## In plain English

### What does Power-source multiplexer mean?

A power multiplexer selects between defined supply paths feeding an output.

### A simple example

A device can transfer between two supported input sources under its selected control rule.

### What the drawings help you do

Show every permitted supply input and the common output, together with the source-selection rule. This block switches a power path, whereas a signal multiplexer routes information. Any seamless transfer, reverse blocking or current limits depend on the selected circuit rather than the block name.

### Before using this reference

- Label the candidate supply inputs and common output.
- Identify the source-priority or selection controls.
- Reference transfer behaviour and any reverse-current requirements.

### Is a power multiplexer the same as a signal multiplexer?

No. Their purposes and electrical duties differ. A power multiplexer manages supplies feeding a load; a signal multiplexer selects information-bearing connections.

### Terms

- Source priority: The rule determining which available supply is selected.
- Reverse current: Current flowing opposite to the intended direction in a power path.

Concept diagram: Available supply inputs → Power-source selection → Common load supply
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.

- [Power-path protection and selection](https://www.ti.com/product-category/power-management/power-protection-switches-controllers/overview.html)


## What it represents

A power multiplexer selects between defined supply paths feeding an output.
A device can transfer between two supported input sources under its selected control rule.
Show every permitted supply input and the common output, together with the source-selection rule. This block switches a power path, whereas a signal multiplexer routes information. Any seamless transfer, reverse blocking or current limits depend on the selected circuit rather than the block name. This is original functional artwork, not a certified standard graphic or device pinout.

## How to read it

- Label the candidate supply inputs and common output.
- Identify the source-priority or selection controls.
- Reference transfer behaviour and any reverse-current requirements.
- A power multiplexer switches supply paths; a signal multiplexer switches information paths.

## Information to show or reference

- Label the candidate supply inputs and common output.
- Identify the source-priority or selection controls.
- Reference transfer behaviour and any reverse-current requirements.

## Important distinction

A power multiplexer switches supply paths; a signal multiplexer switches information paths.

## Facts

- Representation type: Original functional block; not a certified IEC or IEEE graphic
- Concept input: Available supply inputs
- Concept output: Common load supply

## Public references

- [Power-path protection and selection](https://www.ti.com/product-category/power-management/power-protection-switches-controllers/overview.html) — Texas Instruments. Power-path protection and selection: 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.