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SMD code E0 in SOT-323

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.

4 parts in SOT-323 are printed E0

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.

  • AP8821C-40GTSOT-323Voltage supervisor, Anwell SemiconductorVoltage supervisorAnwell Semiconductor
    What it is
    Voltage supervisor
    Maker
    Anwell Semiconductor
    Package
    SOT-323
    Pins
    3
    Details
    Voltage detector IC: 4.0V±2%, -Reset PPO, H-free
    Source
    Published code list

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

  • AP8821C-40PTSOT-323Voltage supervisor, Anwell SemiconductorVoltage supervisorAnwell Semiconductor
    What it is
    Voltage supervisor
    Maker
    Anwell Semiconductor
    Package
    SOT-323
    Pins
    3
    Details
    Voltage detector IC: 4.0V±2%, -Reset PPO
    Source
    Published code list

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

  • EC95808C40C1NSOT-323Voltage supervisor, E-CMOSVoltage supervisorE-CMOS
    What it is
    Voltage supervisor
    Maker
    E-CMOS
    Package
    SOT-323
    Pins
    3
    Details
    Voltage detector IC: 4.0V±2%, -Reset PPO
    Source
    Published code list

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

  • HSMP-381BSOT-323Agilent TechnologiesNot recordedAgilent Technologies
    What it is
    Not recorded
    Maker
    Agilent Technologies
    Package
    SOT-323
    Pins
    3
    Details
    HP3810 pin atten diode
    Source
    Published code list

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

  • 11 more parts have no package on record. Nothing rules them out, so they stay.
    • AP1702ATWAnachipNot recordedAnachip
      What it is
      Not recorded
      Maker
      Anachip
      Package
      Not recorded
      Pins
      Not recorded
      Details
      CMOS-IC: Voltage Detector, 4,63V, Reset Push-pull output
      Source
      Published code list

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

    • AP8821C-40GIVoltage supervisor, Anwell SemiconductorVoltage supervisorAnwell Semiconductor
      What it is
      Voltage supervisor
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 4.0V±2%, -Reset PPO, H-free
      Source
      Published code list

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

    • AP8821C-40GSVoltage supervisor, Anwell SemiconductorVoltage supervisorAnwell Semiconductor
      What it is
      Voltage supervisor
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 4.0V±2%, -Reset PPO, H-free
      Source
      Published code list

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

    • AP8821C-40PIVoltage supervisor, Anwell SemiconductorVoltage supervisorAnwell Semiconductor
      What it is
      Voltage supervisor
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 4.0V±2%, -Reset PPO
      Source
      Published code list

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

    • AP8821C-40PSVoltage supervisor, Anwell SemiconductorVoltage supervisorAnwell Semiconductor
      What it is
      Voltage supervisor
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 4.0V±2%, -Reset PPO
      Source
      Published code list

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

    • EC95808C40C7IVoltage supervisor, E-CMOSVoltage supervisorE-CMOS
      What it is
      Voltage supervisor
      Maker
      E-CMOS
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 4.0V±2%, -Reset PPO
      Source
      Published code list

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

    • EC95808C40C7SVoltage supervisor, E-CMOSVoltage supervisorE-CMOS
      What it is
      Voltage supervisor
      Maker
      E-CMOS
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 4.0V±2%, -Reset PPO
      Source
      Published code list

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

    • ESD7Z3.3TVS diode, Formosa MicrosemiTVS diodeFormosa Microsemi
      What it is
      TVS diode
      Maker
      Formosa Microsemi
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Transient voltage supressor: Vrwm=3.3V, Vbr=5.0V, 11.9A, 113W(20ms)
      Source
      Published code list

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

    • IXD5127C55KNRVoltage supervisor, IXYSVoltage supervisorIXYS
      What it is
      Voltage supervisor
      Maker
      IXYS
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 5.5V±0.8%, +Reset PPO, -MR, 800ms Rt delay
      Source
      Published code list

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

    • XC6GC4002HRTorexNot recordedTorex
      What it is
      Not recorded
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      CMOS-IC: Voltage Detector 4,0V, Reset Push-pull output
      Source
      Published code list

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

    • XC6127C55KNRVoltage supervisor, TorexVoltage supervisorTorex
      What it is
      Voltage supervisor
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 5.5V±0.8%, +Reset PPO, -MR, Rdt=800ms
      Source
      Published code list

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

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.

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.

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.

Printed with a code easy to misread as E0

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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