Siemens 3RP1525-1AP30 Time Delay Relay Timer 1 Changeover + LED 24...

LED - Light Emitting Diode - a small light source

DC - Direct Current

AC - Alternating Current

LED - Light Emitting Diode. A bulb that is very efficient at producing light. Often small.

Voltage - A measurement of volts.

Solid - Something that is firm and not liquid, a hard shape that cannot be changed easily.

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