SMD code D in SOD-323
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.
29 parts in SOD-323 are printed D
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.
RB551V-30-HFSOD-323Schottky diode, 2 pins, ComchipSchottky diode2 pinsComchip
- What it is
- Schottky diode
- Maker
- Comchip
- Package
- SOD-323
- Pins
- 2
- Details
- 30 V, 0.5 A Schottky barrier diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
RB551VH-30SOD-323Schottky diode, 2 pins, Galaxy MicroelectronicsSchottky diode2 pinsGalaxy Microelectronics
- What it is
- Schottky diode
- Maker
- Galaxy Microelectronics
- Package
- SOD-323
- Pins
- 2
- Details
- 0.5A, 30V, Surface Mount Small Signal Schottky Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
RB551VM-30SOD-323Schottky diode, 2 pins, ROHMSchottky diode2 pinsROHM
- What it is
- Schottky diode
- Maker
- ROHM
- Package
- SOD-323
- Pins
- 2
- Details
- Schottky Barrier Diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
S-LRB551V-30T1GSOD-323Schottky diode, 2 pins, LRCSchottky diode2 pinsLRC
- What it is
- Schottky diode
- Maker
- LRC
- Package
- SOD-323
- Pins
- 2
- Details
- Schottky diode, VR 20 V, IF 0.5 A, VF Max 0.36 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
SCS551V-30-CSOD-323Schottky diode, 2 pins, SeCoSSchottky diode2 pinsSeCoS
- What it is
- Schottky diode
- Maker
- SeCoS
- Package
- SOD-323
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
TAB12LSOD-323ESD protection diode, 2 pins, RectronESD protection diode2 pinsRectron
- What it is
- ESD protection diode
- Maker
- Rectron
- Package
- SOD-323
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
TRB520V-40SOD-323Schottky diode, 2 pins, Galaxy MicroelectronicsSchottky diode2 pinsGalaxy Microelectronics
- What it is
- Schottky diode
- Maker
- Galaxy Microelectronics
- Package
- SOD-323
- Pins
- 2
- Details
- 0.2A, 40V, Surface Mount Small Signal Schottky Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
TRB551VH-30SOD-323Schottky diode, 2 pins, Galaxy MicroelectronicsSchottky diode2 pinsGalaxy Microelectronics
- What it is
- Schottky diode
- Maker
- Galaxy Microelectronics
- Package
- SOD-323
- Pins
- 2
- Details
- 0.5A, 30V, Surface Mount Small Signal Schottky Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
RB551V-30S2SOD-323Schottky diode, 2 pins, CYStekSchottky diode2 pinsCYStek
- What it is
- Schottky diode
- Maker
- CYStek
- Package
- SOD-323
- Pins
- 2
- Details
- 30 V, 0.5 A Schottky diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
BB659SOD-3232 pins, InfineonNot recorded2 pinsInfineon
- What it is
- Not recorded
- Maker
- Infineon
- Package
- SOD-323
- Pins
- 2
- Source
- An older or alternative marking, from a published code list
Is it dead? The meter test is below: This part.
HSMP-282ZSOD-3232 pins, BroadcomNot recorded2 pinsBroadcom
- What it is
- Not recorded
- Maker
- Broadcom
- Package
- SOD-323
- Pins
- 2
- Source
- Published code list
Is it dead? The meter test is below: This part.
MBRX02550SOD-3232 pins, Micro Commercial ComponentsNot recorded2 pinsMicro Commercial Components
- What it is
- Not recorded
- Maker
- Micro Commercial Components
- Package
- SOD-323
- Pins
- 2
- Details
- 50V 250mA schottky rectifier
- Source
- Published code list
Is it dead? The meter test is below: Schottky diode.
UDZS2V4BWSOD-323Zener diode, 2 pins, Tak Cheong SemiconductorZener diode2 pinsTak Cheong Semiconductor
- What it is
- Zener diode
- Maker
- Tak Cheong Semiconductor
- Package
- SOD-323
- Pins
- 2
- Details
- Zener diode: 2.43..2.63V, Izt=5mA, Zzt=100, 200mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
UDZS2V7BWSOD-323Zener diode, 2 pins, Tak Cheong SemiconductorZener diode2 pinsTak Cheong Semiconductor
- What it is
- Zener diode
- Maker
- Tak Cheong Semiconductor
- Package
- SOD-323
- Pins
- 2
- Details
- Zener diode: 2.69..2.91V, Izt=5mA, Zzt=110, 200mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
1 more part has no package on record. Nothing rules it out, so it stays.
AOCA32116EDual N-channel MOSFET, Alpha & Omega SemiconductorDual N-channel MOSFETNot recordedAlpha & 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.
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.
Schottky diode
Diode range, part lifted or one leg off the pad. Red probe on the anode.
Working, it reads
About 0.15 to 0.45 V anode to cathode, roughly half a silicon diode, and open the other way.
Dead, it reads
- The same reading both ways round, near 0 V with a continuous beep or the same middling value: shorted.
- A reading the wrong way round as well: leaky.
- Open both ways: failed open.
- 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 large Schottky can read about 0.1 V forward and beep like a short, and leaks a little the wrong way when good, more when warm. It is shorted only if it reads the same both ways. Measure it cold, beside an identical cold one.
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.
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.
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.
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.
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