SMD code AC-
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.
187 parts are printed AC-
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.
RT8009-33PJ5SOT-23-5DC-DC converter, 5 pins, RichtekDC-DC converterSOT-23-55 pinsRichtek
- What it is
- DC-DC converter
- Maker
- Richtek
- Package
- SOT-23-5
- Pins
- 5
- Details
- Down converter
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
RT9011-CSGJ6SOT-23-6LDO regulator, 6 pins, RichtekLDO regulatorSOT-23-66 pinsRichtek
- What it is
- LDO regulator
- Maker
- Richtek
- Package
- SOT-23-6
- Pins
- 6
- Details
- Voltage regulator
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
RT9011-CSPJ6SOT-23-6LDO regulator, 6 pins, RichtekLDO regulatorSOT-23-66 pinsRichtek
- What it is
- LDO regulator
- Maker
- Richtek
- Package
- SOT-23-6
- Pins
- 6
- Details
- Voltage regulator
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
RT9012-GMPQVDFNLDO regulator, RichtekLDO regulatorDFNNot recordedRichtek
- What it is
- LDO regulator
- Maker
- Richtek
- Package
- DFN
- Pins
- Not recorded
- Details
- Voltage regulator
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
RT9013B-18PQWAWSONRichtekNot recordedWSONNot recordedRichtek
- What it is
- Not recorded
- Maker
- Richtek
- Package
- WSON
- Pins
- Not recorded
- Details
- Voltage regulator
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
RT9161-31CVSOT-23LDO regulator, 3 pins, RichtekLDO regulatorSOT-233 pinsRichtek
- What it is
- LDO regulator
- Maker
- Richtek
- Package
- SOT-23
- Pins
- 3
- Details
- VR-IC: LDO, 3.1V±2%, 300mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
RT9161-42CXSOT-89LDO regulator, 3 pins, RichtekLDO regulatorSOT-893 pinsRichtek
- What it is
- LDO regulator
- Maker
- Richtek
- Package
- SOT-89
- Pins
- 3
- Details
- VR-IC: LDO, 4.2V±2%, 300mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
RT9193-28GU5SOT-3535 pins, RichtekNot recordedSOT-3535 pinsRichtek
- What it is
- Not recorded
- Maker
- Richtek
- Package
- SOT-353
- Pins
- 5
- Details
- Voltage regulator
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
RT9193-28PU5SOT-3535 pins, RichtekNot recordedSOT-3535 pinsRichtek
- What it is
- Not recorded
- Maker
- Richtek
- Package
- SOT-353
- Pins
- 5
- Details
- Voltage regulator
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
RT9193-30GFMSOP-8LDO regulator, 8 pins, RichtekLDO regulatorMSOP-88 pinsRichtek
- What it is
- LDO regulator
- Maker
- Richtek
- Package
- MSOP-8
- Pins
- 8
- Details
- Voltage regulator
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
RT9819B-28PU3SOT-323Voltage supervisor, 3 pins, RichtekVoltage supervisorSOT-3233 pinsRichtek
- What it is
- Voltage supervisor
- Maker
- Richtek
- Package
- SOT-323
- Pins
- 3
- Details
- Voltage detector
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
RXT2907ASOT-89PNP transistor, 3 pins, ROHMPNP transistorSOT-893 pinsROHM
- What it is
- PNP transistor
- Maker
- ROHM
- Package
- SOT-89
- Pins
- 3
- Details
- Si-pnp: GP, 60V, 600mA, 330mW, B=100..300, >200MHz
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
S-80715AL-ACSOT-893 pins, ABLICNot recordedSOT-893 pinsABLIC
- What it is
- Not recorded
- Maker
- ABLIC
- Package
- SOT-89
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: This part.
2 more parts have no package on record
RT9198A-42GYRichtekNot recordedNot recordedNot recordedRichtek
- What it is
- Not recorded
- Maker
- Richtek
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage regulator
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
RT9198A-42PYLDO regulator, RichtekLDO regulatorNot recordedNot recordedRichtek
- What it is
- LDO regulator
- Maker
- Richtek
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage regulator
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
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.
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.
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.
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.
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