What SMDs Components are Polarized?
Only polarized SMDs require polarity identification. Below are the polarized and non-polarized SMD components.
| SMD components | Non-polarized | Polarized |
| Resistors | / | All resistors |
| Capacitors | Ceramic capacitors | Electrolytic capacitors, tantalum capacitors |
| Inductors | Chip inductors | Multi-pin inductors |
| Diodes | / | All diodes including LEDs |
| ICs | / | All ICs including BGAs |
As you can see, all resistors are non-polarized components, and all diodes, LEDs, ICs are polarized.