SMD code ADP
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.
21 parts are printed ADP
Not sure which one you have?
Answer up to 4 quick questions and these 21 parts are ranked, with a meter test that settles it. It works on a dead part too.
1.0SMBJ70CASMBTVS diode, 2 pins, SOCAYTVS diodeSMB2 pinsSOCAY
- What it is
- TVS diode
- Maker
- SOCAY
- Package
- SMB
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SMB10J70CASMBTVS diode, 2 pins, DOWOTVS diodeSMB2 pinsDOWO
- What it is
- TVS diode
- Maker
- DOWO
- Package
- SMB
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
2SC3838KSOT-23NPN transistor, 3 pins, ROHMNPN transistorSOT-233 pinsROHM
- What it is
- NPN transistor
- Maker
- ROHM
- Package
- SOT-23
- Pins
- 3
- Details
- NPN bipolar transistor
- Source
- Published code list
Is it dead? The meter test is below: NPN transistor.
2SC3838K-PSOT-23RF transistor, 3 pins, ROHMRF transistorSOT-233 pinsROHM
- What it is
- RF transistor
- Maker
- ROHM
- Package
- SOT-23
- Pins
- 3
- Details
- Si-npn: VHF/UHF, 20V, 50mA, 200mW, B=82..180, 3.2GHz
- Source
- Published code list
Is it dead? The meter test is below: Bipolar transistor.
2SC4083SOT-323NPN transistor, 3 pins, ROHMNPN transistorSOT-3233 pinsROHM
- What it is
- NPN transistor
- Maker
- ROHM
- Package
- SOT-323
- Pins
- 3
- Details
- NPN bipolar transistor
- Source
- Published code list
Is it dead? The meter test is below: NPN transistor.
2SC4726SOT-4163 pins, ROHMNot recordedSOT-4163 pinsROHM
- What it is
- Not recorded
- Maker
- ROHM
- Package
- SOT-416
- Pins
- 3
- Details
- npn 11V 3.2GHz TV tuners
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SC4726-PSOT-416RF transistor, 3 pins, ROHMRF transistorSOT-4163 pinsROHM
- What it is
- RF transistor
- Maker
- ROHM
- Package
- SOT-416
- Pins
- 3
- Details
- Si-npn: VHF/UHF, 20V, 50mA, 150mW, B=82..180, 3.2GHz
- Source
- Published code list
Is it dead? The meter test is below: Bipolar transistor.
2SC5662SOT-7233 pins, ROHMNot recordedSOT-7233 pinsROHM
- What it is
- Not recorded
- Maker
- ROHM
- Package
- SOT-723
- Pins
- 3
- Details
- npn 11V 3.2GHz TV tuners
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SC5662-PSOT-723RF transistor, 3 pins, ROHMRF transistorSOT-7233 pinsROHM
- What it is
- RF transistor
- Maker
- ROHM
- Package
- SOT-723
- Pins
- 3
- Details
- Si-npn: VHF/UHF, 20V, 50mA, 150mW, B=82..180, 3.2GHz
- Source
- Published code list
Is it dead? The meter test is below: Bipolar transistor.
BCW60DSOT-23NPN transistor, 3 pins, PhilipsNPN transistorSOT-233 pinsPhilips
- What it is
- NPN transistor
- Maker
- Philips
- Package
- SOT-23
- Pins
- 3
- Details
- 32V, 0.1A, General Purpose NPN Bipolar Transistor
- Source
- Published code list
Is it dead? The meter test is below: NPN transistor.
MAX6377XR22SOT-3233 pins, Analog DevicesNot recordedSOT-3233 pinsAnalog Devices
- What it is
- Not recorded
- Maker
- Analog Devices
- Package
- SOT-323
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: This part.
MAX6469TA18AD3DFNMaxim Integrated ProductsNot recordedDFNNot recordedMaxim Integrated Products
- What it is
- Not recorded
- Maker
- Maxim Integrated Products
- Package
- DFN
- Pins
- Not recorded
- Details
- Linear voltage regulator with volatge detector: LDO, 1.8V±1.3%, 300mA, -Reset PPO, Set, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
3 more parts have no package on record
2SC4043SROHMNot recordedNot recordedNot recordedROHM
- What it is
- Not recorded
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- npn 11V 3.2GHz TV tuners
- Source
- Published code list
Is it dead? The meter test is below: This part.
MAX6405BS404 pins, Analog DevicesNot recordedNot recorded4 pinsAnalog Devices
- What it is
- Not recorded
- Maker
- Analog Devices
- Package
- Not recorded
- Pins
- 4
- Source
- Published code list
Is it dead? The meter test is below: This part.
MAX6484BL33AD3Maxim Integrated ProductsNot recordedNot recordedNot recordedMaxim Integrated Products
- What it is
- Not recorded
- Maker
- Maxim Integrated Products
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator with volatge detector: LDO, 3.3V±1.3%, 300mA, -Reset ODO, FB, +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.
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.
NPN transistor
Diode range, part lifted or its base leg off the pad.
Working, it reads
Red 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.
Bipolar transistor
Diode range, part lifted or its base leg off the pad.
Working, it reads
From the base, one probe colour 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.
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.
Printed with a code easy to misread as ADP
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 ADP
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 23 more parts.
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