In the case of SMD (surface mounted) electrolytic capacitors, there are two basic marking types. The first one clearly states the value in microfarads and the operating voltage. For example, using this approach, a 4.7 μF capacitor with an operating voltage of 25 volts would bear the marking “4.7 25V”. In the other marking system, a letter is followed by three numbers. The letter represents the voltage rating according to the table below. The first two numbers represent the value in picofarads, while the third number is the number of zeroes to be added to the first two. For example, a 4.7 μF capacitor with a voltage rating of 25 volts would bear the marking E476. This translates to 47000000 pF = 47000 nF = 47 μF.