SMD code IZ in SMA
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.
7 parts in SMA are printed IZ
Not sure which one you have?
Answer up to 4 quick questions and these 11 parts are ranked, with a meter test that settles it. It works on a dead part too.
6.0SMAJ5.0CASMATVS diode, 2 pins, Galaxy MicroelectronicsTVS diode2 pinsGalaxy Microelectronics
- What it is
- TVS diode
- Maker
- Galaxy Microelectronics
- Package
- SMA
- Pins
- 2
- Details
- 5V, 600W, Surface Mount TVS
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SMAJ24ASMATVS diode, 2 pins, JieJieTVS diode2 pinsJieJie
- What it is
- TVS diode
- Maker
- JieJie
- Package
- SMA
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SMAJ24A-AUSMATVS diode, 2 pins, JieJieTVS diode2 pinsJieJie
- What it is
- TVS diode
- Maker
- JieJie
- Package
- SMA
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
CD214A-T24ASMATVS diode, 2 pins, BournsTVS diode2 pinsBourns
- What it is
- TVS diode
- Maker
- Bourns
- Package
- SMA
- Pins
- 2
- Details
- TVS: 24V, 10.3A, 400W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
P4SMAJ24ASMATVS diode, 2 pins, PanjitTVS diode2 pinsPanjit
- What it is
- TVS diode
- Maker
- Panjit
- Package
- SMA
- Pins
- 2
- Details
- SMD TVS - 400W
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
SK215ASMASchottky diode, 2 pins, Fagor ElectronicaSchottky diode2 pinsFagor Electronica
- What it is
- Schottky diode
- Maker
- Fagor Electronica
- Package
- SMA
- Pins
- 2
- Details
- Diode: SBR, 150V, 2A, Vf<0.95V(2A)
- Source
- Published code list
Is it dead? The meter test is below: Schottky diode.
SMAJ24AGSMATVS diode, 2 pins, First SemiconductorTVS diode2 pinsFirst Semiconductor
- What it is
- TVS diode
- Maker
- First Semiconductor
- Package
- SMA
- Pins
- 2
- Details
- Transient voltage supressor: Vrwm=24V, Vbr=26.7..30.7V, Ipp=10.3A, 400W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
4 more parts have no package on record. Nothing rules them out, so they stay.
SMF24A-ATTVS diode, WayonTVS diodeNot recordedWayon
- What it is
- TVS diode
- Maker
- Wayon
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
LT4ME24ATVS diode, Lite-On SemiconductorTVS diodeNot recordedLite-On Semiconductor
- What it is
- TVS diode
- Maker
- Lite-On Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Transient voltage supressor: Vrwm=24V, Vbr=26.7..29.5V, Ipp=10.3A, 400W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
P2SMSJ24ATVS diode, YeashinTVS diodeNot recordedYeashin
- What it is
- TVS diode
- Maker
- Yeashin
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Transient voltage supressor: Vrwm=24V, Vbr=26.7..29.5V, Ipp=5.1A, 200W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
SMF4L24AQTVS diode, Diodes IncorporatedTVS diodeNot recordedDiodes Incorporated
- What it is
- TVS diode
- Maker
- Diodes Incorporated
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Transient voltage supressor: Vrwm=24V, Vbr=26.7..29.5V, Ipp=10.3A, 400W(1ms)
- 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.
Schottky diode
Diode range, part lifted or one leg off the pad. Red probe on the anode.
Working, it reads
About 0.15 to 0.45 V anode to cathode, roughly half a silicon diode, and open the other way.
Dead, it reads
- The same reading both ways round, near 0 V with a continuous beep or the same middling value: shorted.
- A reading the wrong way round as well: leaky.
- Open both ways: failed open.
- On the board
- this is a first look only: the meter reads every path between those pins, and a short can be a neighbour. Lift one leg before you condemn it.
- Compare:
- If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
- Watch for:
- A large Schottky can read about 0.1 V forward and beep like a short, and leaks a little the wrong way when good, more when warm. It is shorted only if it reads the same both ways. Measure it cold, beside an identical cold one.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Printed with a code easy to misread as IZ
One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.
Codes not listed here are printed on 7 more parts.
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