• Ceramic Capacitor Markings Ceramic capacitors, known for their small size, use concise markings with digits and letters to indicate capacitance values. These codes convey information in minimal space, often including a base capacitance value followed by a letter for tolerance or temperature coefficient.
Reading capacitor markings involves identifying several key attributes. The capacitance value often marked directly in microfarads (μF), nanofarads (nF), or picofarads (pF). The voltage rating indicates the maximum voltage the capacitor can handle, marked as a number followed by "V".
The rated voltage in V (100V for the first and 16V for the second capacitor) A code indicating the group number / series code (it's the "V" on the first capacitor and the "F" on the second) Either date code (usually two digits) or some lot number identification, or maybe both.
Polarized capacitors are marked with a stripe on the positive end of the package, though some electrolytic SMT capacitors are marked on the negative end of the package. They are rectangular, and often black or tan colored. The black capacitors are easily mistaken for diodes due to the white stripe on one end...
While most modern capacitors use numerical markings, older models often display color codes. These codes indicate values like capacitance and breakdown voltage through a series of colored bands. Figure 2: Standard Capacitor Color Code Each color band on a capacitor represents a specific number or multiplier.
Electrolytic capacitors feature detailed markings to ensure correct application. These typically include the capacitance value, polarity indicators, and voltage ratings. The capacitance value, usually expressed in microfarads (μF), is clearly labeled for easy identification.