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WhatSMDSign in

SMD code GDY

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 are printed GDY

Not sure which one you have?

Answer up to 4 quick questions and these 11 parts are ranked, with a meter test that settles it. It works on a dead part too.

  • 2SA1201GSOT-89PNP transistor, 3 pins, Blue RocketPNP transistorSOT-893 pinsBlue Rocket
    What it is
    PNP transistor
    Maker
    Blue Rocket
    Package
    SOT-89
    Pins
    3
    Details
    PNP bipolar transistor
    Source
    Manufacturer datasheet

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

    Datasheetfor 2SA1201G, opens in a new tab
  • SMCJ11SMCTVS diode, 2 pins, DOWOTVS diodeSMC2 pinsDOWO
    What it is
    TVS diode
    Maker
    DOWO
    Package
    SMC
    Pins
    2
    Source
    Manufacturer datasheet

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

    Datasheetfor SMCJ11, opens in a new tab
  • 1.5SMCJ11SMCTVS diode, 2 pins, PanjitTVS diodeSMC2 pinsPanjit
    What it is
    TVS diode
    Maker
    Panjit
    Package
    SMC
    Pins
    2
    Details
    TVS: 11V, 74.6A, 1500W (1ms)
    Source
    Published code list

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

  • EC76SMCJ11SMCTVS diode, 2 pins, E-CMOSTVS diodeSMC2 pinsE-CMOS
    What it is
    TVS diode
    Maker
    E-CMOS
    Package
    SMC
    Pins
    2
    Details
    Transient voltage supressor: Vrwm=11V, Vbr=12.2..14V, 74.6A, 1500W(1ms)
    Source
    Published code list

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

  • S-8241ADYMC-GDYT2SOT-23-55 pins, ABLICNot recordedSOT-23-55 pinsABLIC
    What it is
    Not recorded
    Maker
    ABLIC
    Package
    SOT-23-5
    Pins
    5
    Source
    Published code list

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

  • SMCG11SMCGTVS diode, 2 pins, VishayTVS diodeSMCG2 pinsVishay
    What it is
    TVS diode
    Maker
    Vishay
    Package
    SMCG
    Pins
    2
    Details
    TVS: 11V, 74.6A, 1500W (1ms)
    Source
    Published code list

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

  • SMCJ11CSMCTVS diode, 2 pins, EIC SemiconductorTVS diodeSMC2 pinsEIC Semiconductor
    What it is
    TVS diode
    Maker
    EIC Semiconductor
    Package
    SMC
    Pins
    2
    Source
    Published code list

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

    Datasheetfor SMCJ11C, opens in a new tab
  • TFMCJ11SMC2 pins, RectronNot recordedSMC2 pinsRectron
    What it is
    Not recorded
    Maker
    Rectron
    Package
    SMC
    Pins
    2
    Details
    TVS: 11V, 74.6A, 1500W (1ms)
    Source
    Published code list

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

  • TV15C110KSMC2 pins, ComchipNot recordedSMC2 pinsComchip
    What it is
    Not recorded
    Maker
    Comchip
    Package
    SMC
    Pins
    2
    Details
    TVS: 11V, 10%, 74.6A, 1500W(1ms)
    Source
    Published code list

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

  • TV15C110K-GSMCTVS diode, 2 pins, ComchipTVS diodeSMC2 pinsComchip
    What it is
    TVS diode
    Maker
    Comchip
    Package
    SMC
    Pins
    2
    Details
    Transient voltage supressor: Vrwm=11.0V, Vbr=12.20..14.90V, Ipp=74.63A, 1500W(1ms)
    Source
    Published code list

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

  • 1 more part has no package on record
    • 1SMC11TVS diode, MotorolaTVS diodeNot recordedNot recordedMotorola
      What it is
      TVS diode
      Maker
      Motorola
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Transient voltage supressor: Vbr=12.2..13.5V, Vrwm=11V, 74.6A, 1500W(1ms)
      Source
      Published code list

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

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.

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.

Printed with a code easy to misread as GDY

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 GDY

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

Codes not listed here are printed on 9 more parts.

Did you find your part?

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