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SMD code ZA in SOT-883

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.

Not sure which one you have?

Answer up to 4 quick questions and these 37 parts are ranked, with a meter test that settles it. It works on a dead part too.

  • BSS84AKMSOT-8833 pins, NexperiaNot recorded3 pinsNexperia
    What it is
    Not recorded
    Maker
    Nexperia
    Package
    SOT-883
    Pins
    3
    Source
    Published code list

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

  • 14 more parts have no package on record. Nothing rules them out, so they stay.
    • ACZRQC52C5V1-HFZener diode, ComchipZener diodeNot recordedComchip
      What it is
      Zener diode
      Maker
      Comchip
      Package
      Not recorded
      Pins
      Not recorded
      Details
      5.1 V 0.125 mW zener diode
      Source
      Manufacturer datasheet

      Is it dead? The meter test is below: Zener diode.

    • ACZRUC52C5V1-HFZener diode, ComchipZener diodeNot recordedComchip
      What it is
      Zener diode
      Maker
      Comchip
      Package
      Not recorded
      Pins
      Not recorded
      Details
      5.1 V 150 mW zener diode
      Source
      Manufacturer datasheet

      Is it dead? The meter test is below: Zener diode.

    • CZRF52C5V1-HFZener diode, ComchipZener diodeNot recordedComchip
      What it is
      Zener diode
      Maker
      Comchip
      Package
      Not recorded
      Pins
      Not recorded
      Details
      5.1 V 0.35 mW zener diode
      Source
      Manufacturer datasheet

      Is it dead? The meter test is below: Zener diode.

    • CZRFR52C5V1-HFZener diode, ComchipZener diodeNot recordedComchip
      What it is
      Zener diode
      Maker
      Comchip
      Package
      Not recorded
      Pins
      Not recorded
      Details
      5.1 V 0.35 mW zener diode
      Source
      Manufacturer datasheet

      Is it dead? The meter test is below: Zener diode.

    • CZRQC52C5V1A-HFZener diode, ComchipZener diodeNot recordedComchip
      What it is
      Zener diode
      Maker
      Comchip
      Package
      Not recorded
      Pins
      Not recorded
      Details
      5.1 V 0.125 mW zener diode
      Source
      Manufacturer datasheet

      Is it dead? The meter test is below: Zener diode.

    • CZRU52C5V1-HFZener diode, ComchipZener diodeNot recordedComchip
      What it is
      Zener diode
      Maker
      Comchip
      Package
      Not recorded
      Pins
      Not recorded
      Details
      5.1 V 0.15 mW zener diode
      Source
      Manufacturer datasheet

      Is it dead? The meter test is below: Zener diode.

    • CZRUR52C5V1-HFZener diode, ComchipZener diodeNot recordedComchip
      What it is
      Zener diode
      Maker
      Comchip
      Package
      Not recorded
      Pins
      Not recorded
      Details
      5.1 V 0.15 mW zener diode
      Source
      Manufacturer datasheet

      Is it dead? The meter test is below: Zener diode.

    • CZRZC52C5V1-HFZener diode, ComchipZener diodeNot recordedComchip
      What it is
      Zener diode
      Maker
      Comchip
      Package
      Not recorded
      Pins
      Not recorded
      Details
      5.1 V 0.1 mW zener diode
      Source
      Manufacturer datasheet

      Is it dead? The meter test is below: Zener diode.

    • MM3Z6V2CW-CZener diode, SeCoSZener diodeNot recordedSeCoS
      What it is
      Zener diode
      Maker
      SeCoS
      Package
      Not recorded
      Pins
      Not recorded
      Source
      Manufacturer datasheet

      Is it dead? The meter test is below: Zener diode.

    • SGM2037-1.0XUDX6GLDO regulator, 6 pins, SG MicroLDO regulator6 pinsSG Micro
      What it is
      LDO regulator
      Maker
      SG Micro
      Package
      Not recorded
      Pins
      6
      Details
      1.0 V output, 500mA, Low Noise, Very Low Dropout Bias Rail CMOS Voltage Regulator
      Source
      Manufacturer datasheet

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

    • TPS799185YZULDO regulator, 5 pins, Texas InstrumentsLDO regulator5 pinsTexas Instruments
      What it is
      LDO regulator
      Maker
      Texas Instruments
      Package
      Not recorded
      Pins
      5
      Details
      200-mA, Low-Quiescent Current, Ultralow Noise, High-PSRR Low-Dropout Linear Regulator
      Source
      Manufacturer datasheet

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

    • ZGFM1043B-MSZener diode, Formosa MicrosemiZener diodeNot recordedFormosa Microsemi
      What it is
      Zener diode
      Maker
      Formosa Microsemi
      Package
      Not recorded
      Pins
      Not recorded
      Source
      Manufacturer datasheet

      Is it dead? The meter test is below: Zener diode.

    • ZGFM1043B-MS-Q1Zener diode, Formosa MicrosemiZener diodeNot recordedFormosa Microsemi
      What it is
      Zener diode
      Maker
      Formosa Microsemi
      Package
      Not recorded
      Pins
      Not recorded
      Source
      Manufacturer datasheet

      Is it dead? The meter test is below: Zener diode.

    • ZGFM1043B-MSTZener diode, Formosa MicrosemiZener diodeNot recordedFormosa Microsemi
      What it is
      Zener diode
      Maker
      Formosa Microsemi
      Package
      Not recorded
      Pins
      Not recorded
      Source
      Manufacturer datasheet

      Is it dead? The meter test is below: Zener diode.

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.

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.

Zener diode

Diode range for the forward check, part lifted, red probe on the anode. A bench supply for the Zener voltage.

Working, it reads

About 0.6 to 0.8 V forward and open in reverse on the diode range. Its Zener voltage shows only on a supply: feed it through a resistor that sets about 5 mA, cathode to positive, read quickly, and it should hold near its rated voltage.

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, forward too: failed open.
  • Holds well off its rated voltage on the supply test: drifted.
  • A soft knee, or a voltage that creeps on the supply test: 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 meter's diode range stops at about 2 to 3 V, so almost every Zener reads open in reverse on it, good or bad; a 3 V meter may just show a 2.4 or 2.7 V part. Above about 3 V the meter cannot tell a Zener from a plain diode.

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.

Printed with a code easy to misread as ZA

One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.

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1 identification has been run against this marking.