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SMD code E3 in SOD-723

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.

2 parts in SOD-723 are printed E3

Not sure which one you have?

Answer up to 4 quick questions and these 50 parts are ranked, with a meter test that settles it. It works on a dead part too.

15 parts have no package on record. Nothing rules them out, so they stay.

  • ES12MRectifier, SeCoSRectifierNot recordedSeCoS
    What it is
    Rectifier
    Maker
    SeCoS
    Package
    Not recorded
    Pins
    Not recorded
    Source
    Manufacturer datasheet

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

    Datasheetfor ES12M, opens in a new tab
  • ES13MRectifier, SeCoSRectifierNot recordedSeCoS
    What it is
    Rectifier
    Maker
    SeCoS
    Package
    Not recorded
    Pins
    Not recorded
    Source
    Manufacturer datasheet

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

    Datasheetfor ES13M, opens in a new tab
  • GSEZ5U1000ESD protection diode, Good-ArkESD protection diodeNot recordedGood-Ark
    What it is
    ESD protection diode
    Maker
    Good-Ark
    Package
    Not recorded
    Pins
    Not recorded
    Details
    ESD protection diode, VRWM 5 V
    Source
    Manufacturer datasheet

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

    Datasheetfor GSEZ5U1000, opens in a new tab
  • MMBZ5233BWSZener diode, Taitron ComponentsZener diodeNot recordedTaitron Components
    What it is
    Zener diode
    Maker
    Taitron Components
    Package
    Not recorded
    Pins
    Not recorded
    Details
    SMD Zener Diodes (Three Terminals) - 200mW
    Source
    Manufacturer datasheet

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

    Datasheetfor MMBZ5233BWS, opens in a new tab
  • NC7ST00L6Logic gate, onsemiLogic gateNot recordedonsemi
    What it is
    Logic gate
    Maker
    onsemi
    Package
    Not recorded
    Pins
    Not recorded
    Details
    TinyLogic HST 2-Input NAND Gate
    Source
    Manufacturer datasheet

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

    Datasheetfor NC7ST00L6, opens in a new tab
  • NX3V1T384GMAnalog switch, 6 pins, NXPAnalog switch6 pinsNXP
    What it is
    Analog switch
    Maker
    NXP
    Package
    Not recorded
    Pins
    6
    Details
    Low-ohmic single-pole single-throw analog switch
    Source
    Manufacturer datasheet

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

    Datasheetfor NX3V1T384GM, opens in a new tab
  • NX3V1T384GWAnalog switch, 5 pins, NXPAnalog switch5 pinsNXP
    What it is
    Analog switch
    Maker
    NXP
    Package
    Not recorded
    Pins
    5
    Details
    Low-ohmic single-pole single-throw analog switch
    Source
    Manufacturer datasheet

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

    Datasheetfor NX3V1T384GW, opens in a new tab
  • 1N914BWTSwitching diode, Fairchild SemiconductorSwitching diodeNot recordedFairchild Semiconductor
    What it is
    Switching diode
    Maker
    Fairchild Semiconductor
    Package
    Not recorded
    Pins
    Not recorded
    Source
    Published code list

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

  • 2SA1688-3Sanyo ElectricNot recordedNot recordedSanyo Electric
    What it is
    Not recorded
    Maker
    Sanyo Electric
    Package
    Not recorded
    Pins
    Not recorded
    Details
    Si-pnp: GP, FM/RF, 30V, 30mA, 150mW, B=60..120, >320MHz
    Source
    Published code list

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

  • AP1702CTWAnachipNot recordedNot recordedAnachip
    What it is
    Not recorded
    Maker
    Anachip
    Package
    Not recorded
    Pins
    Not recorded
    Details
    CMOS-IC: Voltage Detector, 4V, Reset Push-pull output
    Source
    Published code list

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

  • AP8821C-43GIVoltage supervisor, Anwell SemiconductorVoltage supervisorNot recordedAnwell Semiconductor
    What it is
    Voltage supervisor
    Maker
    Anwell Semiconductor
    Package
    Not recorded
    Pins
    Not recorded
    Details
    Voltage detector IC: 4.3V±2%, -Reset PPO, H-free
    Source
    Published code list

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

  • AP8821C-43GSVoltage supervisor, Anwell SemiconductorVoltage supervisorNot recordedAnwell Semiconductor
    What it is
    Voltage supervisor
    Maker
    Anwell Semiconductor
    Package
    Not recorded
    Pins
    Not recorded
    Details
    Voltage detector IC: 4.3V±2%, -Reset PPO, H-free
    Source
    Published code list

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

  • AP8821C-43PIVoltage supervisor, Anwell SemiconductorVoltage supervisorNot recordedAnwell Semiconductor
    What it is
    Voltage supervisor
    Maker
    Anwell Semiconductor
    Package
    Not recorded
    Pins
    Not recorded
    Details
    Voltage detector IC: 4.3V±2%, -Reset PPO
    Source
    Published code list

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

  • AP8821C-43PSVoltage supervisor, Anwell SemiconductorVoltage supervisorNot recordedAnwell Semiconductor
    What it is
    Voltage supervisor
    Maker
    Anwell Semiconductor
    Package
    Not recorded
    Pins
    Not recorded
    Details
    Voltage detector IC: 4.3V±2%, -Reset PPO
    Source
    Published code list

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

  • BD45E332G-MVoltage supervisor, ROHMVoltage supervisorNot recordedROHM
    What it is
    Voltage supervisor
    Maker
    ROHM
    Package
    Not recorded
    Pins
    Not recorded
    Details
    Voltage detector IC: 3.3V±1%, -MR, -Reset ODO, Rdt=200ms
    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.

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.

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.

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.

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