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SMD code M15 in SOT-23

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.

11 parts in SOT-23 are printed M15

Not sure which one you have?

Answer up to 4 quick questions and these 12 parts are ranked, with a meter test that settles it. It works on a dead part too.

  • CPDT-15VUB-HFSOT-23ESD protection diode, 3 pins, ComchipESD protection diode3 pinsComchip
    What it is
    ESD protection diode
    Maker
    Comchip
    Package
    SOT-23
    Pins
    3
    Details
    15 V unidirectional ESD protection diode
    Source
    Manufacturer datasheet

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

  • DW15M2T-SSOT-23ESD protection diode, 3 pins, DOWOESD protection diode3 pinsDOWO
    What it is
    ESD protection diode
    Maker
    DOWO
    Package
    SOT-23
    Pins
    3
    Source
    Manufacturer datasheet

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

  • SM15SOT-23ESD protection diode, 3 pins, Galaxy MicroelectronicsESD protection diode3 pinsGalaxy Microelectronics
    What it is
    ESD protection diode
    Maker
    Galaxy Microelectronics
    Package
    SOT-23
    Pins
    3
    Details
    15V, 300W, Surface Mount TVS
    Source
    Manufacturer datasheet

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

  • TEPM15SOT-23ESD protection diode, 3 pins, RectronESD protection diode3 pinsRectron
    What it is
    ESD protection diode
    Maker
    Rectron
    Package
    SOT-23
    Pins
    3
    Source
    Manufacturer datasheet

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

  • TSM15SOT-23ESD protection diode, 3 pins, Galaxy MicroelectronicsESD protection diode3 pinsGalaxy Microelectronics
    What it is
    ESD protection diode
    Maker
    Galaxy Microelectronics
    Package
    SOT-23
    Pins
    3
    Details
    15V, 300W, Surface Mount TVS
    Source
    Manufacturer datasheet

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

  • 2SA1411-15SOT-233 pins, NEC ElectronicsNot recorded3 pinsNEC Electronics
    What it is
    Not recorded
    Maker
    NEC Electronics
    Package
    SOT-23
    Pins
    3
    Details
    Si-pnp: Sw, 25V, 150mA, 250mW, B=350..700
    Source
    Published code list

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

  • 2SA1613-15SOT-233 pins, NEC ElectronicsNot recorded3 pinsNEC Electronics
    What it is
    Not recorded
    Maker
    NEC Electronics
    Package
    SOT-23
    Pins
    3
    Details
    Si-pnp: Hi-beta, 25V, 150mA, B=135..270
    Source
    Published code list

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

  • LN61FN2112MSOT-23Voltage supervisor, 3 pins, Shanghai Natlinear ElectronicsVoltage supervisor3 pinsShanghai Natlinear Electronics
    What it is
    Voltage supervisor
    Maker
    Shanghai Natlinear Electronics
    Package
    SOT-23
    Pins
    3
    Details
    Voltage detector IC: 2.1V±2%, +Reset ODO, Rdt=200ms
    Source
    Published code list

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

  • TC51N2102ECBSOT-23Voltage supervisor, 3 pins, MicrochipVoltage supervisor3 pinsMicrochip
    What it is
    Voltage supervisor
    Maker
    Microchip
    Package
    SOT-23
    Pins
    3
    Details
    Voltage detector IC: 2.1V±2%, -Reset ODO, Rdt=50..200ms
    Source
    Published code list

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

  • XC61FN2112MSOT-23Voltage supervisor, 3 pins, TorexVoltage supervisor3 pinsTorex
    What it is
    Voltage supervisor
    Maker
    Torex
    Package
    SOT-23
    Pins
    3
    Details
    CMOS-IC: Voltage Detector 2,1V, Reset Open drain output, 200ms
    Source
    Published code list

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

  • XC61HN2112MRSOT-23Voltage supervisor, 3 pins, TorexVoltage supervisor3 pinsTorex
    What it is
    Voltage supervisor
    Maker
    Torex
    Package
    SOT-23
    Pins
    3
    Details
    Voltage detector IC: 2.1V±2%, -Reset ODO, Rdt=50..200ms
    Source
    Published code list

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

  • 1 more part has no package on record. Nothing rules it out, so it stays.
    • ADCMP356YKS-REEL74 pins, Analog DevicesNot 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.

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.

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.

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.

Printed with a code easy to misread as M15

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 M15

For a marking with its end worn or burnt off. Each code has a page of its own.

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