SMD code 02K
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.
02K on a chip resistor
2 kΩ
2 kΩ resistor
The K is both the decimal point and the multiplier: 2 kΩ.
Check it with a meter
Lift one end and measure across it. A good one reads 2 kΩ. Measuring it in circuit reads the parallel combination of everything around it, which is almost always lower, never higher: well above 2 kΩ on the board is a fault. Open, or well above 2 kΩ, means it has failed: burnt, cracked or corroded. That does not change what to fit: the marking still says 2 kΩ. A burnt resistor usually means the part it feeds drew too much, so find that before fitting a new one.
On a transistor or diode body (SOT-23-6, SOT-23-5, SOT-89-5), 02K is a part code instead. Those parts are listed below.
17 parts are printed 02K
Not sure which one you have?
Answer up to 4 quick questions and these 17 parts are ranked, with a meter test that settles it. It works on a dead part too.
WM02DN08DESOT-3636 pins, WayonNot recordedSOT-3636 pinsWayon
- What it is
- Not recorded
- Maker
- Wayon
- Package
- SOT-363
- Pins
- 6
- Details
- MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: MOSFET.
WM02DN08TESOT-5636 pins, WayonNot recordedSOT-5636 pinsWayon
- What it is
- Not recorded
- Maker
- Wayon
- Package
- SOT-563
- Pins
- 6
- Details
- MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: MOSFET.
WM02N08GESOT-3233 pins, WayonNot recordedSOT-3233 pinsWayon
- What it is
- Not recorded
- Maker
- Wayon
- Package
- SOT-323
- Pins
- 3
- Details
- MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: MOSFET.
WM02N08HESOT-7233 pins, WayonNot recordedSOT-7233 pinsWayon
- What it is
- Not recorded
- Maker
- Wayon
- Package
- SOT-723
- Pins
- 3
- Details
- MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: MOSFET.
WM02N08LESOT-5233 pins, WayonNot recordedSOT-5233 pinsWayon
- What it is
- Not recorded
- Maker
- Wayon
- Package
- SOT-523
- Pins
- 3
- Details
- MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: MOSFET.
WM02N08MESOT-233 pins, WayonNot recordedSOT-233 pinsWayon
- What it is
- Not recorded
- Maker
- Wayon
- Package
- SOT-23
- Pins
- 3
- Details
- MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: MOSFET.
2N7002KSOT-23N-channel MOSFET, 3 pins, Formosa MicrosemiN-channel MOSFETSOT-233 pinsFormosa Microsemi
- What it is
- N-channel MOSFET
- Maker
- Formosa Microsemi
- Package
- SOT-23
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: N-channel MOSFET.
AP6402KGVSOT-23-6LDO regulator, 6 pins, Anwell SemiconductorLDO regulatorSOT-23-66 pinsAnwell Semiconductor
- What it is
- LDO regulator
- Maker
- Anwell Semiconductor
- Package
- SOT-23-6
- Pins
- 6
- Details
- Linear voltage regulator IC: LDO, Dual out., Vo1/Vo2=1.5V/2.8V±2%, 250mA, +CE, Halogen-free
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
AP6402KPVSOT-23-6LDO regulator, 6 pins, Anwell SemiconductorLDO regulatorSOT-23-66 pinsAnwell Semiconductor
- What it is
- LDO regulator
- Maker
- Anwell Semiconductor
- Package
- SOT-23-6
- Pins
- 6
- Details
- Linear voltage regulator IC: LDO, Dual out., Vo1/Vo2=1.5V/2.8V±2%, 250mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
ELM85203ASOT-89-5LDO regulator, 5 pins, ELM TechnologyLDO regulatorSOT-89-55 pinsELM Technology
- What it is
- LDO regulator
- Maker
- ELM Technology
- Package
- SOT-89-5
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 2.0V±2%, 600mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
R1182N291BSOT-23-55 pins, Nisshinbo Micro DevicesNot recordedSOT-23-55 pinsNisshinbo Micro Devices
- What it is
- Not recorded
- Maker
- Nisshinbo Micro Devices
- Package
- SOT-23-5
- Pins
- 5
- Details
- VR-IC: LDO, CE, 2.9V±2%, 150mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
4 more parts have no package on record
SGM2221-2.8XTDI6GLDO regulator, 6 pins, SG MicroLDO regulatorNot recorded6 pinsSG Micro
- What it is
- LDO regulator
- Maker
- SG Micro
- Package
- Not recorded
- Pins
- 6
- Details
- 2.8 V output, 300mA, 0.9μA Low Quiescent Current, Low Dropout and High Voltage Regulator
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Voltage regulator.
WM02N08FBWayonNot recordedNot recordedNot recordedWayon
- What it is
- Not recorded
- Maker
- Wayon
- Package
- Not recorded
- Pins
- Not recorded
- Details
- MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: MOSFET.
AP6402KGULDO regulator, Anwell SemiconductorLDO regulatorNot recordedNot recordedAnwell Semiconductor
- What it is
- LDO regulator
- Maker
- Anwell Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, Dual out., Vo1/Vo2=1.5V/2.8V±2%, 250mA, +CE, H-free
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
AP6402KPULDO regulator, Anwell SemiconductorLDO regulatorNot recordedNot recordedAnwell Semiconductor
- What it is
- LDO regulator
- Maker
- Anwell Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, Dual out., Vo1/Vo2=1.5V/2.8V±2%, 250mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
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.
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.
MOSFET
Diode range, part lifted. Test drain to source first, then short gate to source and test again.
Working, it reads
One way between drain and source reads about 0.4 to 0.9 V, the body diode, and the other way open. The gate reads open to both other pins.
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.
- No body diode at all: failed open.
- On the board
- the gate usually has a resistor to the source, which reads as that resistor and is not a fault. 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.
N-channel MOSFET
Diode range, part lifted. Test drain to source first, then short gate to source and test again.
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.
Printed with a code easy to misread as 02K
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 02K
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 317 more parts.
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