What SJ can be
Package size
| Package | Also called | Body | Height |
|---|---|---|---|
| SOD-123 | SOD123 | 2.69 × 1.6 mm | 1.17 mm |
| SOD-323 | SC-76, SOD323 | 1.7 × 1.25 mm | 0.9 mm |
| SMA | DO-214AC, SMA (J-bend) | 4.3 × 2.6 mm | 2.15 mm |
Nominal body size without the leads.
How to tell them apart
Measure the plastic body without the leads: SOD-123 2.69 × 1.6 mm · SOD-323 1.7 × 1.25 mm · SMA 4.3 × 2.6 mm.
Look at where it sits: a small part next to a USB connector is often ESD protection or a Schottky diode; a 3- or 5-pin part near the power input is often a regulator.
The same code can mean different parts at different makers. The package narrows it down, so measure the body.
Open the SMD identifier →Not sure it is this part? Enter the marking with the shape and size of the body: the identifier checks it against all 340 markings in the database.
Frequently asked questions
What is the pinout of SMD code SJ?
B5817W (SOD-123): band = cathode. B5817WS (SOD-323): band = cathode. S1J (SMA): band = cathode.
Marking codes checked against the makers’ datasheets; each part links to its own.