SymbolIndex

Consumer electronics symbols chart

34 symbols and what they mean · symbolindex.com

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  1. Battery symbolBatteryBattery compartment or battery terminals
  2. Battery orientation (+ / -) symbolBattery orientation (+ / -)Which way round to insert the battery
  3. Class II equipment (double insulation) symbolClass II equipment (double insulation)Double or reinforced insulation, no earth needed
  4. Class III construction symbolClass III constructionProtection class III construction
  5. DC plug polarity: centre positive symbolDC plug polarity: centre positiveCentre pin positive, outer sleeve negative
  6. Detachable power supply unit symbolDetachable power supply unitCharged through its separate, detachable power supply
  7. Direct current (DC) symbolDirect current (DC)Direct current rating or connection
  8. Efficiency level VI symbolEfficiency level VIPower supply meets efficiency level VI
  9. Eject symbolEjectEject the disc
  10. Fast forward symbolFast forwardMoves forward quickly through the media being played.
  11. Fast rewind symbolFast rewindWinds back quickly through the media being played.
  12. For indoor use only symbolFor indoor use onlyUse only indoors, in dry rooms
  13. Fuse symbolFuseMarks a fuse, for example on a transformer, power supply or device rating plate.
  14. Headphones symbolHeadphonesHeadphone socket
  15. Microphone off symbolMicrophone offSwitch the microphone off
  16. Mute (speaker with X) symbolMute (speaker with X)Mute the sound
  17. Mute (speaker with slash) symbolMute (speaker with slash)Mute the sound
  18. Next track symbolNext trackNext track (and fast forward)
  19. Non-short-circuit-proof safety isolating transformer symbolNon-short-circuit-proof safety isolating transformerSafety isolating transformer, not short-circuit-proof
  20. Pause symbolPausePause playback
  21. Play symbolPlayStart playback
  22. Play/pause symbolPlay/pauseStart or pause playback (one button)
  23. Power on (I) symbolPower on (I)Switch position: on (connected to the mains)
  24. Previous track symbolPrevious trackPrevious track (and rewind)
  25. Record symbolRecordStart recording
  26. Safety isolating transformer symbolSafety isolating transformerContains a safety isolating transformer
  27. Self-protecting (fail-safe) safety isolating transformer symbolSelf-protecting (fail-safe) safety isolating transformerSelf-protecting safety isolating transformer
  28. Short-circuit-proof safety isolating transformer symbolShort-circuit-proof safety isolating transformerStays safe if overloaded or short-circuited
  29. Source (TV input) symbolSource (TV input)Select the input source
  30. Stop symbolStopStop playback
  31. Switch-mode power supply symbolSwitch-mode power supplyAdapter is a switch-mode power supply
  32. Thermal cut-out symbolThermal cut-outBuilt-in thermal cut-out
  33. Volume down symbolVolume downTurn the volume down
  34. Volume up symbolVolume upTurn the volume up
Symbol Index · symbolindex.com/categories/electronics/chart · free to use, credit appreciatedPrinted 2026-11-12