Symbols · LS SW

Low-side power switch

In plain English

What does Low-side power switch mean?

A low-side switch controls the return-side connection of a load in its specified circuit.

A simple example

A load can remain connected to its supply while its return path is switched by a suitable device.

Load return connectionControlled low-side switchDefined circuit return
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.

What the drawings help you do

Place the switch between the load and its defined return reference. The load may remain connected to the supply even while this switch is open. Show the complete current loop so a reader does not mistake return-path switching for disconnection of every supply conductor.

Return path
The conducting path completing the selected load circuit.
Low side
The return-side position of the switching function.

Before using this reference

  • Identify the load’s permanent supply connection.
  • Show the switched return path and reference.
  • Reference control-drive and load-transient requirements.
Does an open low-side switch isolate the load from the positive supply?

Not necessarily. The positive connection can remain present. The drawing must show the actual conductors being interrupted and any separate isolation arrangement.

Read the source: Low-side power switching

Schematic · LS SWLow-side power switch: original educational illustration
Original educational illustrationNot to scale · See source and graphic notes

A distinction that matters

Low-side switching does not necessarily isolate the load from the supply conductor.

Sources you can follow

These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.

Low-side power switching

Low-side power switching: public technical context for the named function. Product and compliance details remain with the publisher.

Texas Instruments · Public reference checked 27 October 2026 · Link only

About this graphic

This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.

SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.

Entry JSON · Entry Markdown · Last editorial update: 27 October 2026

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