What S4 can be
Package size
| Package | Also called | Body | Height |
|---|---|---|---|
| SMA | DO-214AC, SMA (J-bend) | 4.3 × 2.6 mm | 2.15 mm |
| SMB | DO-214AA, SMB (J-bend) | 4.3 × 3.6 mm | 2.3 mm |
| SMC | DO-214AB, SMC (J-bend) | 6.9 × 5.9 mm | 2.3 mm |
Nominal body size without the leads.
How to tell them apart
Measure the plastic body without the leads: SMA 4.3 × 2.6 mm · SMB 4.3 × 3.6 mm · SMC 6.9 × 5.9 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.
Related parts and their markings
Frequently asked questions
What is the pinout of SMD code S4?
SS14 (SMA): band = cathode. SS24 (SMB): band = cathode. SS34 (SMC): band = cathode.
Marking codes checked against the makers’ datasheets; each part links to its own.