SMD code G in SOT-23-5
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.
1 part in SOT-23-5 is printed G
Not sure which one you have?
Answer up to 4 quick questions and these 32 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.
LMBR4020HT5HGSchottky diode, LRCSchottky diodeNot recordedLRC
- What it is
- Schottky diode
- Maker
- LRC
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Schottky diode, VR 40 V, IF 2 A, VF Max 0.47 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
NCP110AFCT110LDO regulator, onsemiLDO regulatorNot recordedonsemi
- What it is
- LDO regulator
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear Regulator - Low V , Low Noise, High PSRR
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Voltage regulator.
RB531VM-30Schottky diode, ROHMSchottky diodeNot recordedROHM
- What it is
- Schottky diode
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Schottky Barrier Diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
S-LMBR05S30ST5GSchottky diode, LRCSchottky diodeNot recordedLRC
- What it is
- Schottky diode
- Maker
- LRC
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Schottky diode, VR 30 V, IF 0.5 A, VF Max 0.47 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
TCR3UG1825ALDO regulator, ToshibaLDO regulatorNot recordedToshiba
- What it is
- LDO regulator
- Maker
- Toshiba
- Package
- Not recorded
- Pins
- Not recorded
- Details
- TCR3UG series
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Voltage regulator.
VBUS052CD-FAHESD protection diode, VishayESD protection diodeNot recordedVishay
- What it is
- ESD protection diode
- Maker
- Vishay
- Package
- Not recorded
- Pins
- Not recorded
- Details
- 2-Line BUS-Port ESD Protection - Flow Through Design
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
BAR63-02WPIN diode, 2 pins, InfineonPIN diode2 pinsInfineon
- What it is
- PIN diode
- Maker
- Infineon
- Package
- Not recorded
- Pins
- 2
- Source
- An older or alternative marking, from a published code list
Is it dead? The meter test is below: PIN diode or varicap.
BU18UA3WNVXLDO regulator, ROHMLDO regulatorNot recordedROHM
- What it is
- LDO regulator
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 1.8V±1%, 300mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
CMBT3906EPNP transistor, Central SemiconductorPNP transistorNot recordedCentral Semiconductor
- What it is
- PNP transistor
- Maker
- Central Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- PNP transistor: GP, 40V, 200mA, 100mW, B=100..100, 250MHz
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
ESD9Z5.0TVS diode, Formosa MicrosemiTVS diodeNot recordedFormosa Microsemi
- What it is
- TVS diode
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Transient voltage supressor: Vrwm=5.0V, Vbr=6.2V, 12.3A, 107W(20ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
ISL9003AIRUCZ-T6 pins, RenesasNot recorded6 pinsRenesas
- What it is
- Not recorded
- Maker
- Renesas
- Package
- Not recorded
- Pins
- 6
- Details
- equivalent [1.80V LDO]
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
KV1181ETokNot recordedNot recordedTok
- What it is
- Not recorded
- Maker
- Tok
- Package
- Not recorded
- Pins
- Not recorded
- Details
- uhf varicap 2-16pF
- Source
- Published code list
Is it dead? The meter test is below: PIN diode or varicap.
LDLN0254 pins, STMicroelectronicsNot recorded4 pinsSTMicroelectronics
- What it is
- Not recorded
- Maker
- STMicroelectronics
- Package
- Not recorded
- Pins
- 4
- Details
- 250 mA ultra low noise LDO (1.8V)
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
MAZF082Zener diode, PanasonicZener diodeNot recordedPanasonic
- What it is
- Zener diode
- Maker
- Panasonic
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Zener diode: 7.7..8.7V, Zzt=20(5mA), 120mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
MAZN082Zener diode, PanasonicZener diodeNot recordedPanasonic
- What it is
- Zener diode
- Maker
- Panasonic
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Zener diode: 7.7..8.7V, Zzt=20(5mA), 120mW
- Source
- Published code list
Is it dead? The meter test is below: Zener 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.
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.
Voltage regulator
Voltage, board powered, black probe on ground. Then ohms with the power off.
Working, it reads
Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.
Dead, it reads
- Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
- Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
- Power off, input to output near 0 Ω: shorted.
- On the board:
- An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
- Compare:
- The same regulator on another rail or another board shows the right voltages and the right resistances.
- Watch for:
- Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.
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.
PIN diode or varicap
Diode range, part lifted or one leg off the pad. Red probe on the anode.
Working, it reads
About 0.6 to 0.9 V anode to cathode, 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.
- 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 varicap that has drifted in capacitance reads normal on a meter. Only a capacitance meter or the tuning itself shows it.
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.
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