SchematicsHub

The engineering reference hub

Reference

Essential look-up pages: symbols, color codes, SMD markings, package and wiring codes.

  • Schematic symbols reference — common IEC / ANSI symbols for resistors, capacitors, diodes, transistors, op-amps and more.
  • Component marking codes — resistor color codes, capacitor markings, diode series codes and other quick tables.
  • SMD markings — decoding 2–3 character codes on SMD transistors, diodes and ICs.
  • Package and case codes — TO, SOT, SOD, SOIC, TSSOP, QFN, LQFP and other package names with basic dimensions.
  • Wire and cable codes — AWG cross-sections, insulation ratings and common color conventions.