SMD code Aas
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.
27 parts are printed Aas
Not sure which one you have?
Answer up to 4 quick questions and these 27 parts are ranked, with a meter test that settles it. It works on a dead part too.
SN74AHC1G00DCKSOT-353Logic gate, 5 pins, Texas InstrumentsLogic gateSOT-3535 pinsTexas Instruments
- What it is
- Logic gate
- Maker
- Texas Instruments
- Package
- SOT-353
- Pins
- 5
- Details
- Single 2-Input Positive-NAND Gate
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
SN74AHC1G00DRLSOT-553Logic gate, 5 pins, Texas InstrumentsLogic gateSOT-5535 pinsTexas Instruments
- What it is
- Logic gate
- Maker
- Texas Instruments
- Package
- SOT-553
- Pins
- 5
- Details
- Single 2-Input Positive-NAND Gate
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
2SC1415SSOT-893 pins, onsemiNot recordedSOT-893 pinsonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- SOT-89
- Pins
- 3
- Details
- PNP 100V comp 2SC3645
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SD1757KSOT-23NPN transistor, 3 pinsNPN transistorSOT-233 pinsNot recorded
- What it is
- NPN transistor
- Maker
- Not recorded
- Package
- SOT-23
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: NPN transistor.
2SD1757K-SSOT-23NPN transistor, 3 pins, ROHMNPN transistorSOT-233 pinsROHM
- What it is
- NPN transistor
- Maker
- ROHM
- Package
- SOT-23
- Pins
- 3
- Details
- Si-npn: Lo-sat, Mute, 30V, 500mA, 200mW, B=270..560 , 150MHz
- Source
- Published code list
Is it dead? The meter test is below: NPN transistor.
2SD1757KSSOT-233 pins, ROHMNot recordedSOT-233 pinsROHM
- What it is
- Not recorded
- Maker
- ROHM
- Package
- SOT-23
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: This part.
BCW60ASOT-23NPN transistor, 3 pins, InfineonNPN transistorSOT-233 pinsInfineon
- What it is
- NPN transistor
- Maker
- Infineon
- Package
- SOT-23
- Pins
- 3
- Details
- 32V, 0.1A, General Purpose NPN Bipolar Transistor
- Source
- Published code list
Is it dead? The meter test is below: NPN transistor.
HS3FSMC2 pins, Fagor ElectronicaNot recordedSMC2 pinsFagor Electronica
- What it is
- Not recorded
- Maker
- Fagor Electronica
- Package
- SMC
- Pins
- 2
- Details
- Diode: U-fast recov. rectif, 200V, 3A, Vf<1V(3A), 50ns
- Source
- Published code list
Is it dead? The meter test is below: Silicon diode.
HWD809ZEXSOT-323Voltage supervisor, 3 pins, Chengdu Sino MicroelectronicsVoltage supervisorSOT-3233 pinsChengdu Sino Microelectronics
- What it is
- Voltage supervisor
- Maker
- Chengdu Sino Microelectronics
- Package
- SOT-323
- Pins
- 3
- Details
- Voltage detector IC: 2.32V±2%, -Reset PPO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
MAX803ZXRSOT-3233 pins, Analog DevicesNot recordedSOT-3233 pinsAnalog Devices
- What it is
- Not recorded
- Maker
- Analog Devices
- Package
- SOT-323
- Pins
- 3
- Details
- microproc -ve reset gen 2.5V
- Source
- Published code list
Is it dead? The meter test is below: This part.
MAX809ZXRSOT-3233 pins, Analog DevicesNot recordedSOT-3233 pinsAnalog Devices
- What it is
- Not recorded
- Maker
- Analog Devices
- Package
- SOT-323
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: This part.
MAX824LXKSOT-3535 pins, Analog DevicesNot recordedSOT-3535 pinsAnalog Devices
- What it is
- Not recorded
- Maker
- Analog Devices
- Package
- SOT-353
- Pins
- 5
- Source
- Published code list
Is it dead? The meter test is below: This part.
3 more parts have no package on record
2SA1415-SSanyo ElectricNot recordedNot recordedNot recordedSanyo Electric
- What it is
- Not recorded
- Maker
- Sanyo Electric
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Si-pnp: Sw, 180V, 200mA, 500mW, B=140..280, >150MHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
BAR80InfineonNot recordedNot recordedNot recordedInfineon
- What it is
- Not recorded
- Maker
- Infineon
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Si-diode: RF, Shunt, 35V, 100mA, Vf<1V(100mA), 0,6pF
- Source
- Published code list
Is it dead? The meter test is below: Silicon diode.
BCP51MPNP transistor, 5 pins, InfineonPNP transistorNot recorded5 pinsInfineon
- What it is
- PNP transistor
- Maker
- Infineon
- Package
- Not recorded
- Pins
- 5
- Details
- PNP transistor: AF-Dr/Out, 45V, 1A, 1.7W, B=40..250, 100MHz
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
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.
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.
NPN transistor
Diode range, part lifted or its base leg off the pad.
Working, it reads
Red 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.
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.
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.
Printed with a code easy to misread as Aas
One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.
Codes that begin with Aas
For a marking with its end worn or burnt off. Each code has a page of its own.
Codes not listed here are printed on 59 more parts.
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