Is SOT-523 or SOT-323 (SC-70-3) smaller?
The SOT-523 and SOT-323 (also known as SC-70-3) are both small SMD packages, but SOT-523 is even smaller than SOT-323:
- SOT-323 has a body size of
2.0mm x 1.25mmand a height of1.0mm(source) - SOT-523 has a body size of
1.6mm x 0.8mmand a height of0.75mm(source)
The exact size (especially the height may vary by part).