SMD code AJs
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.
The last letter, s, is lower case, which on NXP and Philips parts is a date or factory code, so it was set aside and AJ was searched.
136 parts are printed AJs
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.
2SB1000-JSOT-89PNP transistor, 3 pins, RenesasPNP transistorSOT-893 pinsRenesas
- What it is
- PNP transistor
- Maker
- Renesas
- Package
- SOT-89
- Pins
- 3
- Details
- Si-pnp: AF, 25V, 1A, 1W, 200MHz, B=120..240
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
2SD1782KSOT-23NPN transistor, 3 pins, ROHMNPN transistorSOT-233 pinsROHM
- What it is
- NPN transistor
- Maker
- ROHM
- Package
- SOT-23
- Pins
- 3
- Details
- NPN bipolar transistor
- Source
- Published code list
Is it dead? The meter test is below: NPN transistor.
7WBD383AMXQFNonsemiNot recordedQFNNot recordedonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- QFN
- Pins
- Not recorded
- Details
- CMOS logic IC: Translating bus exchange switch
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
7WBD3305MUDFNonsemiNot recordedDFNNot recordedonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- DFN
- Pins
- Not recorded
- Details
- CMOS logic IC: 2-Bit translating bus switch
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
74AUP2G3407GWSOT-3636 pins, NXPNot recordedSOT-3636 pinsNXP
- What it is
- Not recorded
- Maker
- NXP
- Package
- SOT-363
- Pins
- 6
- Details
- CMOS logic IC: Inverting buffer with open-drain and inverter
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
ADM810JARTSOT-23Voltage supervisor, 3 pins, Analog DevicesVoltage supervisorSOT-233 pinsAnalog Devices
- What it is
- Voltage supervisor
- Maker
- Analog Devices
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 4.0V±1.5%, +Reset PPO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
9 more parts have no package on record
2SK3718AJ3 pins, RenesasNot recordedNot recorded3 pinsRenesas
- What it is
- Not recorded
- Maker
- Renesas
- Package
- Not recorded
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: This part.
7WBD3125AMXonsemiNot recordedNot recordedNot recordedonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS logic IC: 2-Bit translating bus switch
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
74AHC1G17GFNXPNot recordedNot recordedNot recordedNXP
- What it is
- Not recorded
- Maker
- NXP
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS logic IC: Buffer with Schmitt-trigger input
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
74AHC1G17GMNXPNot recordedNot recordedNot recordedNXP
- What it is
- Not recorded
- Maker
- NXP
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS logic IC: Buffer with Schmitt-trigger input
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
74AHC1G17GWNXPNot recordedNot recordedNot recordedNXP
- What it is
- Not recorded
- Maker
- NXP
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS logic IC: Buffer with Schmitt-trigger input
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
74AUP2G3407GFNXPNot recordedNot recordedNot recordedNXP
- What it is
- Not recorded
- Maker
- NXP
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS logic IC: Inverting buffer with open-drain and inverter
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
74AUP2G3407GMNXPNot recordedNot recordedNot recordedNXP
- What it is
- Not recorded
- Maker
- NXP
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS logic IC: Inverting buffer with open-drain and inverter
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
74AUP2G3407GNNXPNot recordedNot recordedNot recordedNXP
- What it is
- Not recorded
- Maker
- NXP
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS logic IC: Inverting buffer with open-drain and inverter
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
74AUP2G3407GSNXPNot recordedNot recordedNot recordedNXP
- What it is
- Not recorded
- Maker
- NXP
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS logic IC: Inverting buffer with open-drain and inverter
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
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.
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.
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.
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.
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.
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