SMD code AH-
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.
168 parts are printed AH-
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.
RT9011-MMGJ6SOT-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-MMPJ6SOT-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-GSPQVDFNLDO 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.
RT9013-33PQVWSONRichtekNot 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.
RT9013B-15PQWAWSONRichtekNot 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.
RT9014A-JPPQVDFNLDO 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.
RT9161-31CXSOT-89LDO regulator, 3 pins, RichtekLDO regulatorSOT-893 pinsRichtek
- What it is
- LDO regulator
- Maker
- Richtek
- Package
- SOT-89
- Pins
- 3
- Details
- VR-IC: LDO, 3.1V±2%, 300mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
RT9161-37CVSOT-23LDO regulator, 3 pins, RichtekLDO regulatorSOT-233 pinsRichtek
- What it is
- LDO regulator
- Maker
- Richtek
- Package
- SOT-23
- Pins
- 3
- Details
- VR-IC: LDO, 3.7V±2%, 300mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
RT9198-32PU5SOT-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.
RT9284BPJ5ESOT-23-5LED driver, 5 pins, RichtekLED driverSOT-23-55 pinsRichtek
- What it is
- LED driver
- Maker
- Richtek
- Package
- SOT-23-5
- Pins
- 5
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
RT9701CBLSOT-23-5Load switch, 5 pins, RichtekLoad switchSOT-23-55 pinsRichtek
- What it is
- Load switch
- Maker
- Richtek
- Package
- SOT-23-5
- Pins
- 5
- Details
- Power switch
- Source
- Published code list
Is it dead? The meter test is below: Load switch.
RT9701GBLSOT-23-5Load switch, 5 pins, RichtekLoad switchSOT-23-55 pinsRichtek
- What it is
- Load switch
- Maker
- Richtek
- Package
- SOT-23-5
- Pins
- 5
- Details
- Power switch
- Source
- Published code list
Is it dead? The meter test is below: Load switch.
RT9701PBLSOT-23-5Load switch, 5 pins, RichtekLoad switchSOT-23-55 pinsRichtek
- What it is
- Load switch
- Maker
- Richtek
- Package
- SOT-23-5
- Pins
- 5
- Details
- Power switch
- Source
- Published code list
Is it dead? The meter test is below: Load switch.
RT9819C-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.
1 more part has no package on record
RP602Z305ADC-DC converter, RicohDC-DC converterNot recordedNot recordedRicoh
- What it is
- DC-DC converter
- Maker
- Ricoh
- Package
- Not recorded
- Pins
- Not recorded
- Details
- DC/DC voltage converter IC: PWM/VFM B-boost, 3.05V±1.5%, 1.5A, 2.6MHz, +CE, CL, Latch-pr.
- 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.
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.
Load switch
Voltage, board powered, black probe on ground.
Working, it reads
Switched on, the output pin sits at the input voltage. Switched off, it sits near 0 V.
Dead, it reads
- Output at the input voltage while switched off: the pass element has shorted.
- Input present and switched on, no output: failed open, or shut down into a shorted load. Power off and measure output to ground.
- On the board:
- An output near 0 Ω to ground is usually the load. Lift the output pin to see which.
- 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 pinout and whether the enable is active high or low differ between parts. The datasheet gives both.
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.