SMD code A29
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.
30 parts are printed A29
Not sure which one you have?
Answer up to 4 quick questions and these 30 parts are ranked, with a meter test that settles it. It works on a dead part too.
AP2P028ENSOT-23P-channel MOSFET, 3 pins, Advanced Power ElectronicsP-channel MOSFETSOT-233 pinsAdvanced Power Electronics
- What it is
- P-channel MOSFET
- Maker
- Advanced Power Electronics
- Package
- SOT-23
- Pins
- 3
- Details
- 20 V, 4.5 A P-channel MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: P-channel MOSFET.
LBZX84A4V7LT1GSOT-23Zener diode, 3 pins, LRCZener diodeSOT-233 pinsLRC
- What it is
- Zener diode
- Maker
- LRC
- Package
- SOT-23
- Pins
- 3
- Details
- Zener diode, VZ Min 4.65 V, VZ Max 4.75 V, Vz@IZT mA 5
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
S-LBZX84A4V7LT1GSOT-23Zener diode, 3 pins, LRCZener diodeSOT-233 pinsLRC
- What it is
- Zener diode
- Maker
- LRC
- Package
- SOT-23
- Pins
- 3
- Details
- Zener diode, VZ Min 4.65 V, VZ Max 4.75 V, Vz@IZT mA 5
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
AAT60229A-S5SOT-23-5Voltage supervisor, 5 pins, Advanced Analog TechnologyVoltage supervisorSOT-23-55 pinsAdvanced Analog Technology
- What it is
- Voltage supervisor
- Maker
- Advanced Analog Technology
- Package
- SOT-23-5
- Pins
- 5
- Details
- Voltage detector IC: 2.9V±2%, -Reset PPO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
AAT60229A-S15SOT-343Voltage supervisor, 4 pins, Advanced Analog TechnologyVoltage supervisorSOT-3434 pinsAdvanced Analog Technology
- What it is
- Voltage supervisor
- Maker
- Advanced Analog Technology
- Package
- SOT-343
- Pins
- 4
- Details
- Voltage detector IC: 2.9V±2%, -Reset PPO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
CAZ23C4V3SOT-23Zener diode, 3 pins, Silicon-Based TechnologyZener diodeSOT-233 pinsSilicon-Based Technology
- What it is
- Zener diode
- Maker
- Silicon-Based Technology
- Package
- SOT-23
- Pins
- 3
- Details
- Zener diode: Dual, 4.0..4.60V, Zzt=95, Izt=5.0mA, 300mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
CAZ59C4V3SOT-23Zener diode, 3 pins, Silicon-Based TechnologyZener diodeSOT-233 pinsSilicon-Based Technology
- What it is
- Zener diode
- Maker
- Silicon-Based Technology
- Package
- SOT-23
- Pins
- 3
- Details
- Zener diode: Dual, 4.0..4.60V, Zzt=95, Izt=5.0mA, 400mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
ELM9729NABSOT-89Voltage supervisor, 3 pins, ELM TechnologyVoltage supervisorSOT-893 pinsELM Technology
- What it is
- Voltage supervisor
- Maker
- ELM Technology
- Package
- SOT-89
- Pins
- 3
- Details
- Voltage detector IC: 2.9V±2.5%, +Reset ODO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
ELM9729NBBSOT-23Voltage supervisor, 3 pins, ELM TechnologyVoltage supervisorSOT-233 pinsELM Technology
- What it is
- Voltage supervisor
- Maker
- ELM Technology
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 2.9V±2.5%, +Reset ODO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
GS809CSEUASOT-23Voltage supervisor, 3 pins, VishayVoltage supervisorSOT-233 pinsVishay
- What it is
- Voltage supervisor
- Maker
- Vishay
- Package
- SOT-23
- Pins
- 3
- Details
- CMOS-IC: Voltage Detector 2,93V, -Reset Push-pull output, 1,5ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
KIC77A29TSOT-23Voltage supervisor, 3 pins, KECVoltage supervisorSOT-233 pinsKEC
- What it is
- Voltage supervisor
- Maker
- KEC
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 2.9V±1%, -Reset ODO, Rdt=240ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
KTF810T-2.93SOT-23Voltage supervisor, 3 pins, IcmVoltage supervisorSOT-233 pinsIcm
- What it is
- Voltage supervisor
- Maker
- Icm
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 2.93V±1.5%, +Reset PPO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
LN2351P4012MSOT-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, 4.0V±2%, 400mA, 100kHz
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
2 more parts have no package on record
ADA4627-1ACPZ-R28 pins, Analog DevicesNot recordedNot recorded8 pinsAnalog Devices
- What it is
- Not recorded
- Maker
- Analog Devices
- Package
- Not recorded
- Pins
- 8
- Source
- Published code list
Is it dead? The meter test is below: This part.
KIC77A29MVoltage supervisor, KECVoltage supervisorNot recordedNot recordedKEC
- What it is
- Voltage supervisor
- Maker
- KEC
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 2.9V±1%, -Reset ODO, Rdt=240ms
- 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.
P-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 drain, black on the source: 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. 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.
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.
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.
Printed with a code easy to misread as A29
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 A29
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 1 more part.
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