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SMD code AAZ

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.

18 parts are printed AAZ

Not sure which one you have?

Answer up to 4 quick questions and these 18 parts are ranked, with a meter test that settles it. It works on a dead part too.

  • 1.0SMBJ11CASMBTVS diode, 2 pins, SOCAYTVS diodeSMB2 pinsSOCAY
    What it is
    TVS diode
    Maker
    SOCAY
    Package
    SMB
    Pins
    2
    Source
    Manufacturer datasheet

    Is it dead? The meter test is below: TVS or ESD protection diode.

    Datasheetfor 1.0SMBJ11CA, opens in a new tab
  • NCP603SN330SOT-23-5LDO regulator, 5 pins, onsemiLDO regulatorSOT-23-55 pinsonsemi
    What it is
    LDO regulator
    Maker
    onsemi
    Package
    SOT-23-5
    Pins
    5
    Details
    LDO Regulator - High Performance CMOS, Enable and Enhanced ESD
    Source
    Manufacturer datasheet

    Is it dead? The meter test is below: Voltage regulator.

    Datasheetfor NCP603SN330, opens in a new tab
  • SMAF11ASMAFTVS diode, 2 pins, Galaxy MicroelectronicsTVS diodeSMAF2 pinsGalaxy Microelectronics
    What it is
    TVS diode
    Maker
    Galaxy Microelectronics
    Package
    SMAF
    Pins
    2
    Details
    11V, 400W, Surface Mount TVS
    Source
    Manufacturer datasheet

    Is it dead? The meter test is below: TVS or ESD protection diode.

    Datasheetfor SMAF11A, opens in a new tab
  • SMAJ11ASMATVS diode, 2 pins, Galaxy MicroelectronicsTVS diodeSMA2 pinsGalaxy Microelectronics
    What it is
    TVS diode
    Maker
    Galaxy Microelectronics
    Package
    SMA
    Pins
    2
    Source
    Manufacturer datasheet

    Is it dead? The meter test is below: TVS or ESD protection diode.

    Datasheetfor SMAJ11A, opens in a new tab
  • SMB10J11CASMBTVS diode, 2 pins, DOWOTVS diodeSMB2 pinsDOWO
    What it is
    TVS diode
    Maker
    DOWO
    Package
    SMB
    Pins
    2
    Source
    Manufacturer datasheet

    Is it dead? The meter test is below: TVS or ESD protection diode.

    Datasheetfor SMB10J11CA, opens in a new tab
  • TP2261U-SC5R-SSOT-353Operational amplifier, 5 pins, 3PEAKOperational amplifierSOT-3535 pins3PEAK
    What it is
    Operational amplifier
    Maker
    3PEAK
    Package
    SOT-353
    Pins
    5
    Details
    36-V, 3.5-MHz, 15-V/μs Operational Amplifier
    Source
    Manufacturer datasheet

    Is it dead? The meter test is below: Integrated circuit.

    Datasheetfor TP2261U-SC5R-S, opens in a new tab
  • TSMAJ11ASMATVS diode, 2 pins, Galaxy MicroelectronicsTVS diodeSMA2 pinsGalaxy Microelectronics
    What it is
    TVS diode
    Maker
    Galaxy Microelectronics
    Package
    SMA
    Pins
    2
    Details
    11V, 400W, Surface Mount TVS
    Source
    Manufacturer datasheet

    Is it dead? The meter test is below: TVS or ESD protection diode.

    Datasheetfor TSMAJ11A, opens in a new tab
  • TVJ10B110JB-HFSMBTVS diode, 2 pins, ComchipTVS diodeSMB2 pinsComchip
    What it is
    TVS diode
    Maker
    Comchip
    Package
    SMB
    Pins
    2
    Details
    11 V 1000 W bidirectional TVS diode
    Source
    Manufacturer datasheet

    Is it dead? The meter test is below: TVS or ESD protection diode.

    Datasheetfor TVJ10B110JB-HF, opens in a new tab
  • HWD803LEXSOT-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: 4.63V±2%, -Reset ODO
    Source
    Published code list

    Is it dead? The meter test is below: Integrated circuit.

  • MAX803LXRSOT-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 5.0V
    Source
    Published code list

    Is it dead? The meter test is below: This part.

  • MAX825LXKSOT-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.

  • MAX6390XS26D4SOT-3434 pins, Analog DevicesNot recordedSOT-3434 pinsAnalog Devices
    What it is
    Not recorded
    Maker
    Analog Devices
    Package
    SOT-343
    Pins
    4
    Source
    Published code list

    Is it dead? The meter test is below: This part.

  • RP107N331BSOT-23-5LDO regulator, 5 pins, RicohLDO regulatorSOT-23-55 pinsRicoh
    What it is
    LDO regulator
    Maker
    Ricoh
    Package
    SOT-23-5
    Pins
    5
    Details
    Linear voltage regulator IC: LDO, 3.3V±1%, 200mA, +CE
    Source
    Published code list

    Is it dead? The meter test is below: Voltage regulator.

  • 2 more parts have no package on record
    • MAX6411BS344 pins, Analog DevicesNot recordedNot 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.

    • MAX6411BS34-TAnalog DevicesNot recordedNot recordedNot recordedAnalog Devices
      What it is
      Not recorded
      Maker
      Analog Devices
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Volt. Detect. (3.400 V/Open Drain,Active-Low)
      Source
      Published code list

      Is it dead? The meter test is below: This part.

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.

TVS or ESD protection diode

Diode range, from the protected line to ground, part lifted if you can.

Working, it reads

A one-way part reads about 0.6 to 0.8 V forward and open in reverse. A two-way part reads open both ways. Arrays with several lines read as the datasheet's diagram draws them.

Dead, it reads

  • From the line to ground, the same reading both ways, near 0 V with a continuous beep: shorted.
  • A reading both ways on a one-way part: leaky.
  • A one-way part open both ways: failed open.
On the board
, a line reading shorted to ground can be this part or anything else on that line. Lift it: if the short goes with it, it has failed.
Compare:
The same part on the next line or connector pin is the healthy reading to compare with.
Watch for:
A two-way part reads open both ways when it is good, exactly like one that has failed open. The meter cannot tell them apart; an identical part on the next line can.

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.

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.

Printed with a code easy to misread as AAZ

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 AAZ

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 37 more parts.

Did you find your part?

Open this in the search to correct a character or try another package.