Safety and rating symbols on electrical devices.
A crossed-out wheeled bin symbol required on electrical and electronic products under EU law, instructing separate collection rather than general disposal.
A crossed-out wheeled bin symbol, sometimes marked with Pb, Cd or Hg, required on batteries under EU law to signal separate collection.
A vertical line entering the top of a broken circle — IEC 60417-5009, marking a control that puts equipment into a low-power state rather than fully disconnecting it.
A vertical line inside an unbroken circle — IEC 60417-5010, marking a button that switches equipment between fully on and fully off.
A vertical bar (|) — IEC 60417-5007, marking the control position that places equipment into a fully powered state.
A plain circle (◯) — IEC 60417-5008, marking the control position that disconnects power from the equipment.
A small square inside a larger square — IEC 60417-5172, marking equipment protected by double or reinforced insulation rather than an earth connection.
A circle enclosing a three-bar earth glyph — IEC 60417-5019, marking the protective earth (ground) terminal on Class I equipment.
A wavy line (∼) — IEC 60417-5032, indicating on a rating plate that equipment is suitable for alternating current.
A solid line above a dashed line — IEC 60417-5031, indicating on a rating plate that equipment is suitable for direct current.
A zigzag or a plain rectangle in a circuit, marking a resistor.
Two parallel lines across a break in a wire, marking a capacitor.
A row of humps or a filled rectangle in a wire, marking an inductor.
A triangle pointing at a bar, marking a diode.
A diode symbol with two arrows pointing away, marking a light-emitting diode.
A line with two angled leads inside a circle, one carrying an arrow.
Alternating long and short parallel lines, marking a cell or battery.
A break in a wire bridged by a hinged line, marking a switch.
A rectangle with a line through it, marking a fuse.
Two coils facing each other across parallel lines, marking a transformer.
A circle with a cross inside it, marking a lamp or indicator.
A circle containing the letter M, marking an electric motor.
A capital A, the SI unit symbol for the ampere.
The two letters Hz, the SI unit symbol for the hertz.
A capital N, the SI unit symbol for the newton.
A capital W, the SI unit symbol for the watt.
A capital V, the SI unit symbol for the volt.
A capital F, the SI unit symbol for the farad.
The two letters lm, the SI unit symbol for the lumen.
A lower-case Greek mu with a straight descender, used as the SI prefix for one millionth.
A flattened oval outline, marking a USB Type-C port.
A flat-backed D shape, outputting true only when every input is true.
A curved-back shield shape, outputting true when any input is true.
A coil beside a switch, showing a circuit that a second circuit operates.
A resistor with an arrow touching it, marking a variable division of voltage.
A small rectangle between two plates, marking a quartz frequency reference.