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SMD marking decoder calculator

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Two or three characters on a package 2 mm long, and no reel to check them against. A resistor code is real arithmetic — three digits are two significant figures then a power of ten, so 103 is $10\times {10}^3$ = 10 kΩ — and this tool will tell you the answer flatly. A three-lead package is the opposite: its code belongs to whoever made it, another maker may use the same two characters for something else entirely, so the honest output is a shortlist. The mistake to avoid is settling a transistor from the code alone; make the package outline and the circuit agree with the answer before you order the part.

Example 103 → 10 kΩ · Resistor, Three-digit code · 1 other reading below

More than one system fits these characters. They are listed most likely first, but nothing except the package outline and the circuit can actually decide it — a code alone never carries that information.

Which system you are reading is decided by the package, not by the code — and the package is usually the faster read.