SMD code -AQ
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.
83 parts are printed -AQ
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.
TLV70734DQNX2SONLDO regulator, 4 pins, Texas InstrumentsLDO regulatorX2SON4 pinsTexas Instruments
- What it is
- LDO regulator
- Maker
- Texas Instruments
- Package
- X2SON
- Pins
- 4
- Details
- 200-mA, Low-IQ, Low-Noise, Low-Dropout Regulator for Portable Devices
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Voltage regulator.
MTA600P02KY3SOT-723P-channel MOSFET, 3 pins, CYStekP-channel MOSFETSOT-7233 pinsCYStek
- What it is
- P-channel MOSFET
- Maker
- CYStek
- Package
- SOT-723
- Pins
- 3
- Details
- -20 V, -0.65 A P-channel MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: P-channel MOSFET.
2PB709QSOT-23PNP transistor, 3 pins, PhilipsPNP transistorSOT-233 pinsPhilips
- What it is
- PNP transistor
- Maker
- Philips
- Package
- SOT-23
- Pins
- 3
- Details
- PNP transistor: GP, 25V, 100mA, 250mW, B=160..260, >60MHz
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
2PD1820AQSOT-3233 pins, PhilipsNot recordedSOT-3233 pinsPhilips
- What it is
- Not recorded
- Maker
- Philips
- Package
- SOT-323
- Pins
- 3
- Details
- gp sw amp 50V npn hfe 85-170
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SA1979U-QSOT-3233 pins, AUK SemiconductorNot recordedSOT-3233 pinsAUK Semiconductor
- What it is
- Not recorded
- Maker
- AUK Semiconductor
- Package
- SOT-323
- Pins
- 3
- Details
- Si-pnp: AF, 40V, 500mA, 200mW, B=70..140, 200MHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SB709-QSOT-233 pins, PanNot recordedSOT-233 pinsPan
- What it is
- Not recorded
- Maker
- Pan
- Package
- SOT-23
- Pins
- 3
- Details
- Si-pnp: GP, AF, 50V, 600mA, B=160..260, 150MHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SB709QSOT-233 pins, Panasonic (Matsushita Electric Industrial Co.Not recordedSOT-233 pinsPanasonic (Matsushita Electric Industrial Co.
- What it is
- Not recorded
- Maker
- Panasonic (Matsushita Electric Industrial Co.
- Package
- SOT-23
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SB766SOT-89PNP transistor, 3 pins, Galaxy MicroelectronicsPNP transistorSOT-893 pinsGalaxy Microelectronics
- What it is
- PNP transistor
- Maker
- Galaxy Microelectronics
- Package
- SOT-89
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
2SB0766-QSOT-89PNP transistor, 3 pins, PanasonicPNP transistorSOT-893 pinsPanasonic
- What it is
- PNP transistor
- Maker
- Panasonic
- Package
- SOT-89
- Pins
- 3
- Details
- PNP transistor: AF, 50V, 1A, 1W, B=85..170, 200MHz
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
2SB766-QSOT-893 pins, PanNot recordedSOT-893 pinsPan
- What it is
- Not recorded
- Maker
- Pan
- Package
- SOT-89
- Pins
- 3
- Details
- Si-pnp: AF, 50V, 1A, 1W, B=120..240, 200MHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SB1218-QSOT-3233 pins, PanNot recordedSOT-3233 pinsPan
- What it is
- Not recorded
- Maker
- Pan
- Package
- SOT-323
- Pins
- 3
- Details
- Si-pnp: AF, 25V, 100mA, 150mW, B=160..260, >80MHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SB1462-QSOT-233 pins, PanNot recordedSOT-233 pinsPan
- What it is
- Not recorded
- Maker
- Pan
- Package
- SOT-23
- Pins
- 3
- Details
- Si-pnp: GP, 60V, 100mA, 80MHz, B=120..270
- Source
- Published code list
Is it dead? The meter test is below: This part.
3 more parts have no package on record
MTA600P02KFEP-channel MOSFET, CYStekP-channel MOSFETNot recordedNot recordedCYStek
- What it is
- P-channel MOSFET
- Maker
- CYStek
- Package
- Not recorded
- Pins
- Not recorded
- Details
- -20 V, -0.62 A P-channel MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: P-channel MOSFET.
2SA1969Sanyo ElectricNot recordedNot recordedNot recordedSanyo Electric
- What it is
- Not recorded
- Maker
- Sanyo Electric
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Si-pnp: HF, Fast-Sw, 10/10V, 400mA, 1,3W, B=20..120, 1,7GHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SA1979UF-QAUK SemiconductorNot recordedNot recordedNot recordedAUK Semiconductor
- What it is
- Not recorded
- Maker
- AUK Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Si-pnp: AF, 40V, 500mA, 200mW, B=70..140, 200MHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
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.
Voltage regulator
Voltage, board powered, black probe on ground. Then ohms with the power off.
Working, it reads
Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.
Dead, it reads
- Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
- Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
- Power off, input to output near 0 Ω: shorted.
- On the board:
- An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
- Compare:
- The same regulator on another rail or another board shows the right voltages and the right resistances.
- Watch for:
- Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
P-channel MOSFET
Diode range, part lifted. Test drain to source first, then short gate to source and test again.
Working, it reads
Red probe on the drain, black on the source: about 0.4 to 0.9 V, the body diode. Open the other way. The gate reads open to both other pins, both ways.
Dead, it reads
- Drain to source the same both ways, near 0 V with a continuous beep, and still so after shorting gate to source: shorted. The classic failure.
- The gate reads low to source or drain: gate shorted. Often all three pins end up shorted together.
- No body diode at all: failed open.
- On the board
- the gate usually has a resistor to the source, so gate to source reads that resistor, which is not a fault. Lift a leg to be sure.
- Compare:
- If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
- Watch for:
- The diode range can charge the gate enough to turn the part on, and then drain to source reads near 0 both ways on a good part. Short gate to source and test again before you condemn it.
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.
Did you find your part?
Open this in the search to correct a character or try another package.