SMD code AER in SOT-89
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.
5 parts in SOT-89 are printed AER
Not sure which one you have?
Answer up to 4 quick questions and these 11 parts are ranked, with a meter test that settles it. It works on a dead part too.
2SB1424SOT-89PNP transistor, 3 pins, Galaxy MicroelectronicsPNP transistor3 pinsGalaxy Microelectronics
- What it is
- PNP transistor
- Maker
- Galaxy Microelectronics
- Package
- SOT-89
- Pins
- 3
- Details
- PNP bipolar transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
2SB1424-RSOT-89Transistor, 3 pins, YFWTransistor3 pinsYFW
- What it is
- Transistor
- Maker
- YFW
- Package
- SOT-89
- Pins
- 3
- Details
- Bipolar transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
2SB1424RSOT-893 pins, ROHMNot recorded3 pinsROHM
- What it is
- Not recorded
- Maker
- ROHM
- Package
- SOT-89
- Pins
- 3
- Details
- equivalent 2SB1585SR
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SB1424SQ-RSOT-89PNP transistor, 3 pins, Dongguan Pingjingsemi TechnologyPNP transistor3 pinsDongguan Pingjingsemi Technology
- What it is
- PNP transistor
- Maker
- Dongguan Pingjingsemi Technology
- Package
- SOT-89
- Pins
- 3
- Details
- PNP transistor: Lo-sat, 20V, 3A, 500mW, B=180..390, 240MHz
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
2SC1419RSOT-893 pins, onsemiNot recorded3 pinsonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- SOT-89
- Pins
- 3
- Details
- PNP HV comp 2SC3649
- Source
- Published code list
Is it dead? The meter test is below: This part.
6 more parts have no package on record. Nothing rules them out, so they stay.
2SA1419-RSanyo ElectricNot recordedNot recordedSanyo Electric
- What it is
- Not recorded
- Maker
- Sanyo Electric
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Si-pnp: HV, Sw, 180V, 1,5A, 500mW, B=100..200, 120MHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
MAX6408BS234 pins, Analog DevicesNot recorded4 pinsAnalog Devices
- What it is
- Not recorded
- Maker
- Analog Devices
- Package
- Not recorded
- Pins
- 4
- Source
- Published code list
Is it dead? The meter test is below: This part.
MAX6408BS23-TAnalog DevicesNot recordedNot recordedAnalog Devices
- What it is
- Not recorded
- Maker
- Analog Devices
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Volt. Detect. (2.320 V/Open Drain,Active-Low)
- Source
- Published code list
Is it dead? The meter test is below: This part.
MAX6477BL22BD3Maxim Integrated ProductsNot recordedNot recordedMaxim Integrated Products
- What it is
- Not recorded
- Maker
- Maxim Integrated Products
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator with volatge detector: LDO, 2.2V±1.3%, 300mA, -Reset PPO, Set, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
XC6501A23A7R-GLDO regulator, TorexLDO regulatorNot recordedTorex
- What it is
- LDO regulator
- Maker
- Torex
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 2.35V±1%, 200mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
XC6501A23AGR-GLDO regulator, TorexLDO regulatorNot recordedTorex
- What it is
- LDO regulator
- Maker
- Torex
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 2.35V±1%, 200mA, +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.
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.
Bipolar transistor
Diode range, part lifted or its base leg off the pad.
Working, it reads
From the base, one probe colour 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.
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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