SMD code A3-
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.
220 parts are printed A3-
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.
HSMS-280ESOT-3233 pins, Avago / BroadcomSOT-3233 pinsAvago / Broadcom
- What it is
- Not recorded
- Maker
- Avago / Broadcom
- Package
- SOT-323
- Pins
- 3
- Details
- Si-diode: Dual, Schtk, RF, 70V, 1A, Vf<0,41V(1mA), <2pF, 35Ω(5mA)
- Source
- Published code list
Is it dead? The meter test is below: Silicon diode.
HSMS-2803SOT-233 pins, Avago / BroadcomSOT-233 pinsAvago / Broadcom
- What it is
- Not recorded
- Maker
- Avago / Broadcom
- Package
- SOT-23
- Pins
- 3
- Details
- HP2800 ser pair
- Source
- Published code list
Is it dead? The meter test is below: This part.
KIC3201S-13SOT-893 pins, KECSOT-893 pinsKEC
- What it is
- LDO regulator
- Maker
- KEC
- Package
- SOT-89
- Pins
- 3
- Details
- Linear voltage regulator IC: LDO, 1.3V±2%, 400mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
LD39020ADTPU10RDFN4 pins, STMicroelectronicsDFN4 pinsSTMicroelectronics
- What it is
- Not recorded
- Maker
- STMicroelectronics
- Package
- DFN
- Pins
- 4
- Details
- equivalent [1.0V LDO]
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
LR8555-13AQSOT-3535 pins, LRCSOT-3535 pinsLRC
- What it is
- LDO regulator
- Maker
- LRC
- Package
- SOT-353
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 1.3V±2%, 50mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
LR8555-13ARASOT-23-55 pins, LRCSOT-23-55 pinsLRC
- What it is
- LDO regulator
- Maker
- LRC
- Package
- SOT-23-5
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 1.3V±2%, 50mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
LR8555-13ARBSOT-23-55 pins, LRCSOT-23-55 pinsLRC
- What it is
- LDO regulator
- Maker
- LRC
- Package
- SOT-23-5
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 1.3V±2%, 50mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
LR8555-13KQSOT-3535 pins, LRCSOT-3535 pinsLRC
- What it is
- LDO regulator
- Maker
- LRC
- Package
- SOT-353
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 1.3V±2%, 50mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
LR8555-13KRASOT-23-55 pins, LRCSOT-23-55 pinsLRC
- What it is
- LDO regulator
- Maker
- LRC
- Package
- SOT-23-5
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 1.3V±2%, 50mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
LR8555-13KRBSOT-23-55 pins, LRCSOT-23-55 pinsLRC
- What it is
- LDO regulator
- Maker
- LRC
- Package
- SOT-23-5
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 1.3V±2%, 50mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
LR8555-23AQSOT-3535 pins, LRCSOT-3535 pinsLRC
- What it is
- LDO regulator
- Maker
- LRC
- Package
- SOT-353
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 2.3V±2%, 50mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
LR8555-23ARASOT-23-55 pins, LRCSOT-23-55 pinsLRC
- What it is
- LDO regulator
- Maker
- LRC
- Package
- SOT-23-5
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 2.3V±2%, 50mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
LR8555-23ARBSOT-23-55 pins, LRCSOT-23-55 pinsLRC
- What it is
- LDO regulator
- Maker
- LRC
- Package
- SOT-23-5
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 2.3V±2%, 50mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
2 more parts have no package on record
IXD1233H141NR-GIXYSNot recordedNot recordedIXYS
- What it is
- LDO regulator
- Maker
- IXYS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 1.4V±1%, 200mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
IXD1504A1317R-GIXYSNot recordedNot recordedIXYS
- What it is
- LDO regulator
- Maker
- IXYS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 1.3V±20mV, 150mA, +CE
- 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.
Silicon diode
Diode range, part lifted or one leg off the pad. Red probe on the anode.
Working, it reads
About 0.5 to 0.8 V anode to cathode, and open the other way. Small switching diodes read about 0.6 to 0.7 V; large rectifiers can read a little lower.
Dead, it reads
- The same reading both ways round, near 0 V with a continuous beep or the same middling value: shorted.
- Open both ways: failed open.
- A reading the wrong way round as well: 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 three-pin body can hold two diodes. With a common pin they read two junctions from that pin, just like a transistor; in series they read two drops end to end. Test each pair the datasheet names.
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.
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.
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