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SMD code GCL

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 are printed GCL

Not sure which one you have?

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

  • 3T064ALCSMB2 pins, Lucky ForestNot recordedSMB2 pinsLucky Forest
    What it is
    Not recorded
    Maker
    Lucky Forest
    Package
    SMB
    Pins
    2
    Details
    Thyristor surge protector: Vdrm=58V, Vs=77V, Ipp=2.2A(1ms), 60pF
    Source
    Published code list

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

  • BAS70CL-AE3SOT-23Schottky diode, 3 pins, UnisonicSchottky diodeSOT-233 pinsUnisonic
    What it is
    Schottky diode
    Maker
    Unisonic
    Package
    SOT-23
    Pins
    3
    Details
    Diode: Dual, Schottky, 70V, 70mA, Vf<1V(15mA), <2pF, 5ns, L-free
    Source
    Published code list

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

  • BAS70CWL-AL3SOT-323Schottky diode, 3 pins, UnisonicSchottky diodeSOT-3233 pinsUnisonic
    What it is
    Schottky diode
    Maker
    Unisonic
    Package
    SOT-323
    Pins
    3
    Details
    Diode: Dual, Schottky, 70V, 70mA, Vf<1V(15mA), <2pF, 5ns, L-free
    Source
    Published code list

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

  • S-8241ACLMC-GCLT2SOT-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.

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.

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.

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.

Printed with a code easy to misread as GCL

One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.

Codes not listed here are printed on 5 more parts.

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