Component Marking Codes
Decode SMD resistor and capacitor marking codes. Searchable lookup tables for 3-digit, 4-digit, EIA-96 resistor codes and ceramic/film capacitor markings.
SMD Resistor Code Chart
Complete reference for SMD resistor marking codes. Includes 3-digit, 4-digit, and EIA-96 code systems with resistance values and tolerances.
Capacitor Marking Code Chart
Complete reference for ceramic and film capacitor marking codes. Decode 3-digit codes, voltage ratings, tolerance codes, and temperature coefficient markings.
About Component Marking Codes
Surface-mount device (SMD) components use compact marking codes due to their small size. Understanding these codes is essential for circuit assembly, repair, and inventory management.
SMD Resistor Codes
SMD resistors typically use one of three marking systems: 3-digit codes (E24 series, 5% tolerance),4-digit codes (E96 series, 1% tolerance), or EIA-96 codes (alphanumeric, 1% tolerance). The "R" character indicates the decimal point position in low-value resistors.
Capacitor Codes
Ceramic and film capacitors use 3-digit codes where the first two digits are significant figures and the third digit is the multiplier (power of 10 in picofarads). Additional letter codes indicate voltage rating, tolerance, and temperature coefficient (dielectric type).