SMD code IT-
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.
33 parts are printed IT-
Not sure which one you have?
Answer up to 4 quick questions and these 33 parts are ranked, with a meter test that settles it. It works on a dead part too.
CHT817GPSOT-23NPN transistor, 3 pins, ChenmkoNPN transistorSOT-233 pinsChenmko
- What it is
- NPN transistor
- Maker
- Chenmko
- Package
- SOT-23
- Pins
- 3
- Details
- NPN Muti-Chip General Purpose Amplifier, 45 V, 0.5 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: NPN transistor.
P4SMAFJ18ASMAFTVS diode, 2 pins, Blue RocketTVS diodeSMAF2 pinsBlue Rocket
- What it is
- TVS diode
- Maker
- Blue Rocket
- Package
- SMAF
- Pins
- 2
- Details
- TVS diode, unidirectional
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
PTVSHC1RF18VBSOD-123FTVS diode, 2 pins, PrisemiTVS diodeSOD-123F2 pinsPrisemi
- What it is
- TVS diode
- Maker
- Prisemi
- Package
- SOD-123F
- Pins
- 2
- Details
- TVS diode, 18 V working, bidirectional
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SDFL18A-CSOD-123FTVS diode, 2 pins, SeCoSTVS diodeSOD-123F2 pinsSeCoS
- What it is
- TVS diode
- Maker
- SeCoS
- Package
- SOD-123F
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SMAJ18ASMATVS diode, 2 pins, JieJieTVS diodeSMA2 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.
SMAJ18A-AUSMATVS diode, 2 pins, JieJieTVS diodeSMA2 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.
SMF18ASOD-123FTVS diode, 2 pins, Taitron ComponentsTVS diodeSOD-123F2 pinsTaitron Components
- What it is
- TVS diode
- Maker
- Taitron Components
- Package
- SOD-123F
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
TLV803EA17DPWX2SONVoltage supervisor, 5 pins, Texas InstrumentsVoltage supervisorX2SON5 pinsTexas Instruments
- What it is
- Voltage supervisor
- Maker
- Texas Instruments
- Package
- X2SON
- Pins
- 5
- Details
- Low Power 250-nA IQ and Small Size Supply Voltage Supervisors
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
2SB0792-TSOT-23PNP transistor, 3 pins, PanasonicPNP transistorSOT-233 pinsPanasonic
- What it is
- PNP transistor
- Maker
- Panasonic
- Package
- SOT-23
- Pins
- 3
- Details
- PNP transistor: AF, LN, 150V, 50mA, 200mW, B=260..450, 200MHz
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
2SB792-TSOT-233 pins, PanNot recordedSOT-233 pinsPan
- What it is
- Not recorded
- Maker
- Pan
- Package
- SOT-23
- Pins
- 3
- Details
- Si-pnp: GP, AF, LN, 150V, 50mA, 200mW, B=260..450, 200MHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SB1220-TSOT-3233 pins, PanNot recordedSOT-3233 pinsPan
- What it is
- Not recorded
- Maker
- Pan
- Package
- SOT-323
- Pins
- 3
- Details
- Si-pnp: AF, LN, 150V, 100mA, 150mW, B=260..450, 200MHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SB1463-TSOT-233 pins, PanNot recordedSOT-233 pinsPan
- What it is
- Not recorded
- Maker
- Pan
- Package
- SOT-23
- Pins
- 3
- Details
- Si-pnp: GP, 150V, 50mA, 200MHz, B=360..700
- Source
- Published code list
Is it dead? The meter test is below: This part.
CD214A-T18ASMATVS diode, 2 pins, BournsTVS diodeSMA2 pinsBourns
- What it is
- TVS diode
- Maker
- Bourns
- Package
- SMA
- Pins
- 2
- Details
- TVS: 18V, 13.7A, 400W(1ms)
- 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
SM4F18A-ATTVS diode, WayonTVS diodeNot recordedNot 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.
SMF18A-ATTVS diode, WayonTVS diodeNot recordedNot 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.
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.
NPN transistor
Diode range, part lifted or its base leg off the pad.
Working, it reads
Red probe on the base reads about 0.6 to 0.75 V to the emitter and to the collector, and open the other way round. Collector to emitter reads open both ways.
Dead, it reads
- Collector to emitter the same both ways, near 0 V with a continuous beep: shorted. The commonest failure.
- The base the same both ways to another pin, near 0 V or a middling value: a shorted junction.
- Only one junction reads, or none: a junction has failed open. It then looks like a diode.
- A reading the wrong way round, where it should be open: leaky.
- 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 pair of diodes with a common pin reads just like a transistor, and some transistors carry a built-in diode or resistor. The datasheet says which.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
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.
Integrated circuit
Voltage with the board powered; ohms from each pin to ground with it off.
Working, it reads
Supply pin at its voltage and the output doing what the datasheet says. Readings between pins depend on the part.
Dead, it reads
- A pin near 0 Ω to ground or to the supply pin where an identical part does not read that: failed short.
- Supply present, output stuck: failed, or its load has.
- On the board:
- A pin shorted to ground on the board can be anything on that net. Lift the pin to be sure.
- Compare:
- The surest reference is the same IC on a working board, measured pin by pin.
- Watch for:
- Its protection diodes can read like junctions between pins, even like a transistor. That proves nothing either way.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
PNP transistor
Diode range, part lifted or its base leg off the pad.
Working, it reads
Black probe on the base reads about 0.6 to 0.75 V to the emitter and to the collector, and open the other way round. Collector to emitter reads open both ways.
Dead, it reads
- Collector to emitter the same both ways, near 0 V with a continuous beep: shorted. The commonest failure.
- The base the same both ways to another pin, near 0 V or a middling value: a shorted junction.
- Only one junction reads, or none: a junction has failed open. It then looks like a diode.
- A reading the wrong way round, where it should be open: leaky.
- 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 pair of diodes with a common pin reads just like a transistor, and some transistors carry a built-in diode or resistor. The datasheet says which.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
This part
Diode range and ohms range, part lifted.
Working, it reads
Depends on what it is. The datasheet, or an identical part, says.
Dead, it reads
- Between two pins, the same reading both ways, near 0 V with a continuous beep: shorted.
- Open between every pair of pins: failed open, or a part that reads open when working.
- 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.
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 IT-
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 166 more parts.
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