What K38 can be
K38BSS138N-channel MOSFETSOT-23 · Diodes Inc. · 50 V · 0.2 A · RDS(on) 3.5 Ω at 10 V
Pins: 1=G 2=S 3=D
On the part, up to 2 more characters can follow K38: a date or factory code. datasheet
K38BSS138WN-channel MOSFETSOT-323 · Diodes Inc. · 50 V · 0.2 A · RDS(on) 3.5 Ω at 10 V
Pins: 1=G 2=S 3=D
On the part, up to 2 more characters can follow K38: a date or factory code. datasheet
Package size
| Package | Also called | Body | Height |
|---|---|---|---|
| SOT-23 | TO-236AB, SOT-23-3 | 2.9 × 1.3 mm | 1 mm |
| SOT-323 | SC-70, SC-70-3 | 2 × 1.25 mm | 0.95 mm |
Nominal body size without the leads.
How to tell them apart
Measure the plastic body without the leads: SOT-23 2.9 × 1.3 mm · SOT-323 2 × 1.25 mm.
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
| Part | Marking | Type | Package |
|---|---|---|---|
| BSS138 | SS | N-channel MOSFET | SOT-23 |
| BSS138BK | SB | N-channel MOSFET | SOT-23 |
| BSS138P | AN | N-channel MOSFET | SOT-23 |
| BSS138PW | XJ | N-channel MOSFET | SOT-323 |
Frequently asked questions
What is the pinout of SMD code K38?
BSS138 (SOT-23): 1=G 2=S 3=D. BSS138W (SOT-323): 1=G 2=S 3=D.
Marking codes checked against the makers’ datasheets; each part links to its own.