SMD code A6K
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.
16 parts are printed A6K
Not sure which one you have?
Answer up to 4 quick questions and these 16 parts are ranked, with a meter test that settles it. It works on a dead part too.
FMUN2133SOT-23Digital transistor (PNP, resistors built in), 3 pins, Formosa MicrosemiDigital transistor (PNP, resistors built in)SOT-233 pinsFormosa Microsemi
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- Formosa Microsemi
- Package
- SOT-23
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
FMUN2133-Q1SOT-23Digital transistor (PNP, resistors built in), 3 pins, Formosa MicrosemiDigital transistor (PNP, resistors built in)SOT-233 pinsFormosa Microsemi
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- Formosa Microsemi
- Package
- SOT-23
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
LMUN2133LT1GSOT-23Digital transistor (PNP, resistors built in), 3 pins, LRCDigital transistor (PNP, resistors built in)SOT-233 pinsLRC
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- LRC
- Package
- SOT-23
- Pins
- 3
- Details
- Digital transistor (bias resistors built in), PNP, IC 100 mA, VCEO 50 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
MMUN2133SOT-23Digital transistor (resistors built in), 3 pins, YFWDigital transistor (resistors built in)SOT-233 pinsYFW
- What it is
- Digital transistor (resistors built in)
- Maker
- YFW
- Package
- SOT-23
- Pins
- 3
- Details
- Digital transistor (bias resistors built in)
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
MMUN2133LSOT-23Digital transistor (PNP, resistors built in), 3 pins, onsemiDigital transistor (PNP, resistors built in)SOT-233 pinsonsemi
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- onsemi
- Package
- SOT-23
- Pins
- 3
- Details
- Digital Transistors (BRT) R1 = 4.7 k , R2 = 47 k
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
S-LMUN2133LT1GSOT-23Digital transistor (PNP, resistors built in), 3 pins, LRCDigital transistor (PNP, resistors built in)SOT-233 pinsLRC
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- LRC
- Package
- SOT-23
- Pins
- 3
- Details
- Digital transistor (bias resistors built in), PNP, IC 100 mA, VCEO 50 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
DTA143ZN3SOT-23Digital transistor (PNP, resistors built in), 3 pins, CYStekDigital transistor (PNP, resistors built in)SOT-233 pinsCYStek
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- CYStek
- Package
- SOT-23
- Pins
- 3
- Details
- PNP digital (resistor-equipped) transistor, R1 4.7K, R2 47K
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
LN2351P4852MSOT-23DC-DC converter, 3 pins, Shanghai Natlinear ElectronicsDC-DC converterSOT-233 pinsShanghai Natlinear Electronics
- What it is
- DC-DC converter
- Maker
- Shanghai Natlinear Electronics
- Package
- SOT-23
- Pins
- 3
- Details
- DC/DC voltage converter IC: PFM st-up, 4.8V±2%, 400mA, 300kHz
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
LN2351P4852PSOT-89DC-DC converter, 3 pins, Shanghai Natlinear ElectronicsDC-DC converterSOT-893 pinsShanghai Natlinear Electronics
- What it is
- DC-DC converter
- Maker
- Shanghai Natlinear Electronics
- Package
- SOT-89
- Pins
- 3
- Details
- DC/DC voltage converter IC: PFM st-up, 4.8V±2%, 400mA, 300kHz
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
LN2351P4852SSOT-23-5DC-DC converter, 5 pins, Shanghai Natlinear ElectronicsDC-DC converterSOT-23-55 pinsShanghai Natlinear Electronics
- What it is
- DC-DC converter
- Maker
- Shanghai Natlinear Electronics
- Package
- SOT-23-5
- Pins
- 5
- Details
- DC/DC voltage converter IC: PFM st-up, 4.8V±2%, 400mA, 300kHz, +CE
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
MMUN2133LT1SOT-233 pins, onsemiNot recordedSOT-233 pinsonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- SOT-23
- Pins
- 3
- Details
- PNP TRANS W/ 4.7K RESISTOR NET.
- Source
- Published code list
Is it dead? The meter test is below: Resistor.
XC6114B218MRSOT-23-5Voltage supervisor, 5 pins, TorexVoltage supervisorSOT-23-55 pinsTorex
- What it is
- Voltage supervisor
- Maker
- Torex
- Package
- SOT-23-5
- Pins
- 5
- Details
- CMOS-IC: VDet 1.8V, ±Reset PPO, Wt=50ms, Rt=25ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6114B248MRSOT-23-5Voltage supervisor, 5 pins, TorexVoltage supervisorSOT-23-55 pinsTorex
- What it is
- Voltage supervisor
- Maker
- Torex
- Package
- SOT-23-5
- Pins
- 5
- Details
- CMOS-IC: VDet 4.8V, ±Reset PPO, Wt=50ms, Rt=25ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6371A672PSOT-89DC-DC converter, 3 pins, TorexDC-DC converterSOT-893 pinsTorex
- What it is
- DC-DC converter
- Maker
- Torex
- Package
- SOT-89
- Pins
- 3
- Details
- DC/DC voltage converter IC: PWM st-up, 180kHz, 6.7V±2.5%, 100mA
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6371C672PSOT-89-5DC-DC converter, 5 pins, TorexDC-DC converterSOT-89-55 pinsTorex
- What it is
- DC-DC converter
- Maker
- Torex
- Package
- SOT-89-5
- Pins
- 5
- Details
- DC/DC voltage converter IC: PWM st-up, 180kHz, 6.7V±2.5%, 100mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
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.
Digital transistor
Ohms range, part lifted. The datasheet gives the built-in resistors: R1 in series with the base, R2 from base to emitter.
Working, it reads
Base to emitter reads about R1 plus R2 either way round, about 20 kΩ on a 10 k and 10 k part, give or take their wide tolerance. Collector to emitter reads open. A part with no R2 reads a junction behind R1 one way instead.
Dead, it reads
- Collector to emitter the same both ways, near 0 Ω with a continuous beep: shorted.
- From the base, open or far above R1 plus R2: R1 has failed. Static damage shows here most often.
- Base to emitter near 0 Ω: failed short.
- 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:
- The readings depend on the resistor values, so an identical part elsewhere on the board is the surest reference. Measure it the same way.
- Watch for:
- On the diode range a good part with 10 kΩ resistors reads open on every pair, so a good part looks dead there. Use the ohms range.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Digital transistor
Ohms range, part lifted. The datasheet gives the built-in resistors: R1 in series with the base, R2 from base to emitter.
Working, it reads
Base to emitter reads about R1 plus R2 either way round, about 20 kΩ on a 10 k and 10 k part, give or take their wide tolerance. Collector to emitter reads open. A part with no R2 reads a junction behind R1 one way instead.
Dead, it reads
- Collector to emitter the same both ways, near 0 Ω with a continuous beep: shorted.
- From the base, open or far above R1 plus R2: R1 has failed. Static damage shows here most often.
- Base to emitter near 0 Ω: failed short.
- 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:
- The readings depend on the resistor values, so an identical part elsewhere on the board is the surest reference. Measure it the same way.
- Watch for:
- On the diode range a good part with 10 kΩ resistors reads open on every pair, so a good part looks dead there. Use the ohms range.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
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.
Resistor
Ohms range, across it, power off.
Working, it reads
Its marked value, within tolerance. On the board it reads the same or lower, because everything around it sits in parallel.
Dead, it reads
- Open: burnt, cracked, or eaten through by sulphur. The commonest failure.
- Well above its marked value: drifted high.
- On the board, clearly higher than its marked value: it has failed, since the board can only pull a reading down.
- On the board:
- A reading lower than marked on the board proves nothing; lift one end. A reading higher than marked is a fault even on the board.
- Compare:
- The same position on another channel usually carries the same value, and so does the matching part on another board.
- Watch for:
- A burnt resistor usually means the part it feeds pulled too much. Find that before fitting a new one, or it burns too. The marking, not the reading, says what to fit.
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 A6K
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 A6K
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 8 more parts.
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