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SMD code L-

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.

136 parts are printed L-

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.

  • NLU1G14AMUDFNonsemiNot recordedDFNNot recordedonsemi
    What it is
    Not recorded
    Maker
    onsemi
    Package
    DFN
    Pins
    Not recorded
    Details
    CMOS logic IC: Inverter with Schmitt-trigger input
    Source
    Published code list

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

  • NLU1GT32CMUDFNonsemiNot recordedDFNNot recordedonsemi
    What it is
    Not recorded
    Maker
    onsemi
    Package
    DFN
    Pins
    Not recorded
    Details
    CMOS logic IC: 2-input OR gate with voltage-level translator
    Source
    Published code list

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

  • NLU1GT50MUDFNonsemiNot recordedDFNNot recordedonsemi
    What it is
    Not recorded
    Maker
    onsemi
    Package
    DFN
    Pins
    Not recorded
    Details
    CMOS logic IC: Noninverting buffer, TTL level
    Source
    Published code list

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

  • NLU1GT50MUTCGDFN6 pins, onsemiNot recordedDFN6 pinsonsemi
    What it is
    Not recorded
    Maker
    onsemi
    Package
    DFN
    Pins
    6
    Source
    Published code list

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

  • NLU1GT86MUDFNonsemiNot recordedDFNNot recordedonsemi
    What it is
    Not recorded
    Maker
    onsemi
    Package
    DFN
    Pins
    Not recorded
    Details
    CMOS logic IC: 2-input EXCLUSIVE-OR gate, TTL level
    Source
    Published code list

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

  • NLU1GT125CMUDFNonsemiNot recordedDFNNot recordedonsemi
    What it is
    Not recorded
    Maker
    onsemi
    Package
    DFN
    Pins
    Not recorded
    Details
    CMOS logic IC: Bus buffer gate with 3-state output, TTL level
    Source
    Published code list

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

  • NLX2G04MUDFNonsemiNot recordedDFNNot recordedonsemi
    What it is
    Not recorded
    Maker
    onsemi
    Package
    DFN
    Pins
    Not recorded
    Details
    CMOS logic IC: Dual inverter
    Source
    Published code list

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

  • NSBA113EF3TSOT-1123Digital transistor (PNP, resistors built in), 3 pins, onsemiDigital transistor (PNP, resistors built in)SOT-11233 pinsonsemi
    What it is
    Digital transistor (PNP, resistors built in)
    Maker
    onsemi
    Package
    SOT-1123
    Pins
    3
    Details
    PNP transistor: Sw, 50V, 100mA, 200mW, R1/R2=1k/1k
    Source
    Published code list

    Is it dead? The meter test is below: Digital transistor.

  • NSBA114TF3TSOT-1123PNP transistor, 3 pins, onsemiPNP transistorSOT-11233 pinsonsemi
    What it is
    PNP transistor
    Maker
    onsemi
    Package
    SOT-1123
    Pins
    3
    Details
    PNP transistor: Sw, 50V, 100mA, 200mW, R=10k
    Source
    Published code list

    Is it dead? The meter test is below: PNP transistor.

  • NZ9F6V8STSOD-923Zener diode, 2 pins, onsemiZener diodeSOD-9232 pinsonsemi
    What it is
    Zener diode
    Maker
    onsemi
    Package
    SOD-923
    Pins
    2
    Details
    Zener diode: 6.65..6.93V, Izt=5mA, Zzt=40, 200mW
    Source
    Published code list

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

  • NZ9F12VTSOD-923Zener diode, 2 pins, onsemiZener diodeSOD-9232 pinsonsemi
    What it is
    Zener diode
    Maker
    onsemi
    Package
    SOD-923
    Pins
    2
    Details
    Zener diode: 11.40..12.60V, Izt=5mA, Zzt=30, 200mW
    Source
    Published code list

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

  • 4 more parts have no package on record
    • NLU1GT50AMXonsemiNot recordedNot recordedNot recordedonsemi
      What it is
      Not recorded
      Maker
      onsemi
      Package
      Not recorded
      Pins
      Not recorded
      Details
      CMOS logic IC: Noninverting buffer, TTL level
      Source
      Published code list

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

    • NLU1GT50CMXonsemiNot recordedNot recordedNot recordedonsemi
      What it is
      Not recorded
      Maker
      onsemi
      Package
      Not recorded
      Pins
      Not recorded
      Details
      CMOS logic IC: Noninverting buffer, TTL level
      Source
      Published code list

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

    • PMCA14UN3 pins, Nexperia B.V.Not recordedNot recorded3 pinsNexperia B.V.
      What it is
      Not recorded
      Maker
      Nexperia B.V.
      Package
      Not recorded
      Pins
      3
      Source
      Published code list

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

    • SB02W03CSchottky diode, Sanyo ElectricSchottky diodeNot recordedNot recordedSanyo Electric
      What it is
      Schottky diode
      Maker
      Sanyo Electric
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Diode: Dual, SBR, HF, 30V, 200mA, Vf<0.55V(200mA), 6.3pF, 10ns
      Source
      Published code list

      Is it dead? The meter test is below: Schottky 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.

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.

Digital transistor

Ohms range, part lifted. The datasheet gives the built-in resistors: R1 in series with the base, R2 from base to emitter.

Working, it reads

Base to emitter reads about R1 plus R2 either way round, about 20 kΩ on a 10 k and 10 k part, give or take their wide tolerance. Collector to emitter reads open. A part with no R2 reads a junction behind R1 one way instead.

Dead, it reads

  • Collector to emitter the same both ways, near 0 Ω with a continuous beep: shorted.
  • From the base, open or far above R1 plus R2: R1 has failed. Static damage shows here most often.
  • Base to emitter near 0 Ω: failed short.
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:
The readings depend on the resistor values, so an identical part elsewhere on the board is the surest reference. Measure it the same way.
Watch for:
On the diode range a good part with 10 kΩ resistors reads open on every pair, so a good part looks dead there. Use the ohms range.

A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.

PNP transistor

Diode range, part lifted or its base leg off the pad.

Working, it reads

Black probe on the base reads about 0.6 to 0.75 V to the emitter and to the collector, and open the other way round. Collector to emitter reads open both ways.

Dead, it reads

  • Collector to emitter the same both ways, near 0 V with a continuous beep: shorted. The commonest failure.
  • The base the same both ways to another pin, near 0 V or a middling value: a shorted junction.
  • Only one junction reads, or none: a junction has failed open. It then looks like a diode.
  • A reading the wrong way round, where it should be open: 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 pair of diodes with a common pin reads just like a transistor, and some transistors carry a built-in diode or resistor. The datasheet says which.

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.

Schottky diode

Diode range, part lifted or one leg off the pad. Red probe on the anode.

Working, it reads

About 0.15 to 0.45 V anode to cathode, roughly half a silicon diode, and open the other way.

Dead, it reads

  • The same reading both ways round, near 0 V with a continuous beep or the same middling value: shorted.
  • A reading the wrong way round as well: leaky.
  • Open both ways: failed open.
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 large Schottky can read about 0.1 V forward and beep like a short, and leaks a little the wrong way when good, more when warm. It is shorted only if it reads the same both ways. Measure it cold, beside an identical cold one.

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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