SMD code WX-
Marking codes are not standardised, and the same code is reused by unrelated makers for unrelated parts. Below is every part in our tables printed with it, and any printed with a code that is easy to misread as it, from the manufacturers' own marking tables and published code lists.
140 parts are printed WX-
Not sure which one you have?
Answer up to 4 quick questions and these 50 parts are ranked, with a meter test that settles it. It works on a dead part too.
SMAJ200CAGSMATVS diode, 2 pins, First SemiconductorTVS diodeSMA2 pinsFirst Semiconductor
- What it is
- TVS diode
- Maker
- First Semiconductor
- Package
- SMA
- Pins
- 2
- Details
- Transient voltage supressor: Vrwm=200V, Vbr=222..256.0V, Ipp=1.2A, 400W(1ms), Bidir.
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
TV04A100JBSMA2 pins, ComchipNot recordedSMA2 pinsComchip
- What it is
- Not recorded
- Maker
- Comchip
- Package
- SMA
- Pins
- 2
- Details
- TVS: 10V, 5%, 23.5A, 400W(1ms), Bidirectional
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
TV04A100JB-GSMATVS diode, 2 pins, ComchipTVS diodeSMA2 pinsComchip
- What it is
- TVS diode
- Maker
- Comchip
- Package
- SMA
- Pins
- 2
- Details
- Transient voltage supressor: Vrwm=10.0V, Vbr=11.10..12.30V, Ipp=23.53A, 400W(1ms), Bidir.
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
2 more parts have no package on record
SMAS10CATVS diode, Formosa MicrosemiTVS diodeNot recordedNot recordedFormosa Microsemi
- What it is
- TVS diode
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Transient voltage supressor: Vrwm=10V, Vbr=11.1..12.3V, Ipp=23.5A, 400W(1ms), Bidir.
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
SMF4L90CAQTVS diode, Diodes IncorporatedTVS diodeNot recordedNot recordedDiodes Incorporated
- What it is
- TVS diode
- Maker
- Diodes Incorporated
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Transient voltage supressor: Vrwm=90V, Vbr=100..111V, Ipp=2.7A, 400W(1ms), Bidir.
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
Is it dead? One meter test per kind
Parts of the same kind are tested the same way, so each test is here once. Each part above points to its own.
TVS or ESD protection diode
Diode range, from the protected line to ground, part lifted if you can.
Working, it reads
A one-way part reads about 0.6 to 0.8 V forward and open in reverse. A two-way part reads open both ways. Arrays with several lines read as the datasheet's diagram draws them.
Dead, it reads
- From the line to ground, the same reading both ways, near 0 V with a continuous beep: shorted.
- A reading both ways on a one-way part: leaky.
- A one-way part open both ways: failed open.
- On the board
- , a line reading shorted to ground can be this part or anything else on that line. Lift it: if the short goes with it, it has failed.
- Compare:
- The same part on the next line or connector pin is the healthy reading to compare with.
- Watch for:
- A two-way part reads open both ways when it is good, exactly like one that has failed open. The meter cannot tell them apart; an identical part on the next line can.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
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