SMD code K in DFN
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.
12 parts in DFN are printed K
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.
MC74VHC1GT08MU3DFNLogic gate, onsemiLogic gateonsemi
- What it is
- Logic gate
- Maker
- onsemi
- Package
- DFN
- Pins
- Not recorded
- Details
- Single 2-Input AND Gate
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
ESDALC6V1-5T6DFNSTMicroelectronicsNot recordedSTMicroelectronics
- What it is
- Not recorded
- Maker
- STMicroelectronics
- Package
- DFN
- Pins
- 6
- Source
- Published code list
Is it dead? The meter test is below: This part.
FP6121-JWDGDFNLDO regulator, FitipowerLDO regulatorFitipower
- What it is
- LDO regulator
- Maker
- Fitipower
- Package
- DFN
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, Dual out, Vout1/Vout2=1.3V/2.8V±2%, 150mA, +CE, Green pack.
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
FP6146-25WDGDFNLDO regulator, FitipowerLDO regulatorFitipower
- What it is
- LDO regulator
- Maker
- Fitipower
- Package
- DFN
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 2.5V±2%, 300mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
MC74VHC1G08MU1DFNonsemiNot recordedonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- DFN
- Pins
- Not recorded
- Details
- CMOS logic IC: 2-input AND gate
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
MC74VHC1GU04MU2DFNonsemiNot recordedonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- DFN
- Pins
- Not recorded
- Details
- CMOS logic IC: Single unbuffered inverter
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
NL17SG125CMUDFNonsemiNot recordedonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- DFN
- Pins
- Not recorded
- Details
- CMOS logic IC: Bus buffer gate with 3-state output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
NLU1G08AMUDFNonsemiNot recordedonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- DFN
- Pins
- Not recorded
- Details
- CMOS logic IC: 2-input AND gate
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
NLU1GU04MUDFNonsemiNot recordedonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- DFN
- Pins
- Not recorded
- Details
- CMOS logic IC: Single unbuffered inverter
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
NLU1GU04MUTCGDFNonsemiNot recordedonsemi
- 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.
NLX2G06AMUDFNonsemiNot recordedonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- DFN
- Pins
- Not recorded
- Details
- CMOS logic IC: Dual inverter buffer/driver (ODO)
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
NLX2G07MUDFNonsemiNot recordedonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- DFN
- Pins
- Not recorded
- Details
- CMOS logic IC: Dual noninverting buffer/driver (ODO)
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
3 more parts have no package on record. Nothing rules them out, so they stay.
AOCA33103EDual N-channel MOSFET, Alpha & Omega SemiconductorDual N-channel MOSFETAlpha & Omega Semiconductor
- What it is
- Dual N-channel MOSFET
- Maker
- Alpha & Omega Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Common-drain dual N-channel battery MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: N-channel MOSFET pair.
AOZ8S204BL2-03ESD protection diode, Alpha & Omega SemiconductorESD protection diodeAlpha & Omega Semiconductor
- What it is
- ESD protection diode
- Maker
- Alpha & Omega Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- ESD protection for high-speed interfaces
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
AOZ8S204BL2-05ESD protection diode, Alpha & Omega SemiconductorESD protection diodeAlpha & Omega Semiconductor
- What it is
- ESD protection diode
- Maker
- Alpha & Omega Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- ESD protection for high-speed interfaces
- Source
- Manufacturer datasheet
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.
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.
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.
N-channel MOSFET pair
Diode range, part lifted. Test drain to source first, then short gate to source and test again. Test each MOSFET on its own pins, as the datasheet's pinout gives them.
Working, it reads
Red probe on the source, black on the drain: about 0.4 to 0.9 V, the body diode. Open the other way. The gate reads open to both other pins, both ways.
Dead, it reads
- Drain to source the same both ways, near 0 V with a continuous beep, and still so after shorting gate to source: shorted. The classic failure.
- The gate reads low to source or drain: gate shorted. Often all three pins end up shorted together.
- No body diode at all: failed open.
- On the board
- the gate usually has a resistor to the source, so gate to source reads that resistor, which is not a fault. A drain short can be the load. Lift a leg to be sure.
- Compare:
- If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
- Watch for:
- The diode range can charge the gate enough to turn the part on, and then drain to source reads near 0 both ways on a good part. Short gate to source and test again before you condemn it.
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.
Codes that begin with K
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 2,590 more parts.
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