SMD code B 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.
10 parts in SOD-323 are printed B
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.
BAS16-03WSOD-323Switching diode, 2 pins, InfineonSwitching diode2 pinsInfineon
- What it is
- Switching diode
- Maker
- Infineon
- Package
- SOD-323
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
GBLC08ISOD-323ESD protection diode, 2 pins, ProTek DevicesESD protection diode2 pinsProTek Devices
- What it is
- ESD protection diode
- Maker
- ProTek Devices
- Package
- SOD-323
- Pins
- 2
- Details
- Ultra Low Capacitance TVS Array
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
L1SS356T1GSOD-323Switching diode, 2 pins, LRCSwitching diode2 pinsLRC
- What it is
- Switching diode
- Maker
- LRC
- Package
- SOD-323
- Pins
- 2
- Details
- Switching diode, VR 35 V, IF 100 mA, VF Max 1 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
PAM08SD2305SOD-323ESD protection diode, 2 pins, ProTek DevicesESD protection diode2 pinsProTek Devices
- What it is
- ESD protection diode
- Maker
- ProTek Devices
- Package
- SOD-323
- Pins
- 2
- Details
- High Powered TVS Arrays
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
PSD05SOD-323ESD protection diode, 2 pins, ProTek DevicesESD protection diode2 pinsProTek Devices
- What it is
- ESD protection diode
- Maker
- ProTek Devices
- Package
- SOD-323
- Pins
- 2
- Details
- High Powered TVS Array
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
RB520V-30SOD-323Schottky diode, 2 pins, Galaxy MicroelectronicsSchottky diode2 pinsGalaxy Microelectronics
- What it is
- Schottky diode
- Maker
- Galaxy Microelectronics
- Package
- SOD-323
- Pins
- 2
- Details
- 0.2A, 30V, Surface Mount Small Signal Schottky Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
RB551VM-40SOD-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-L1SS356T1GSOD-323Switching diode, 2 pins, LRCSwitching diode2 pinsLRC
- What it is
- Switching diode
- Maker
- LRC
- Package
- SOD-323
- Pins
- 2
- Details
- Switching diode, VR 35 V, IF 100 mA, VF Max 1 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
TAB08LSOD-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.
MBRX02530SOD-3232 pins, Micro Commercial ComponentsNot recorded2 pinsMicro Commercial Components
- What it is
- Not recorded
- Maker
- Micro Commercial Components
- Package
- SOD-323
- Pins
- 2
- Details
- 30V 250mA schottky rectifier
- Source
- Published code list
Is it dead? The meter test is below: Schottky diode.
5 more parts have no package on record. Nothing rules them out, so they stay.
AON1606MOSFET, Alpha & Omega SemiconductorMOSFETNot recordedAlpha & Omega Semiconductor
- What it is
- MOSFET
- Maker
- Alpha & Omega Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Low-voltage (12-30 V) MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: MOSFET.
AON1606LMOSFET, Alpha & Omega SemiconductorMOSFETNot recordedAlpha & Omega Semiconductor
- What it is
- MOSFET
- Maker
- Alpha & Omega Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Low-voltage (12-30 V) MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: MOSFET.
AOZ8S204BLS-03ESD protection diode, Alpha & Omega SemiconductorESD protection diodeNot recordedAlpha & Omega Semiconductor
- What it is
- ESD protection diode
- Maker
- Alpha & Omega Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- ESD protection for high-speed interfaces
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
AOZ8S204BLS-05ESD protection diode, Alpha & Omega SemiconductorESD protection diodeNot recordedAlpha & Omega Semiconductor
- What it is
- ESD protection diode
- Maker
- Alpha & Omega Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- ESD protection for high-speed interfaces
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
AOZ8S322UD2-03ESD protection diode, Alpha & Omega SemiconductorESD protection diodeNot recordedAlpha & Omega Semiconductor
- What it is
- ESD protection diode
- Maker
- Alpha & Omega Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- ESD protection for high-speed interfaces
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
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.
Silicon diode
Diode range, part lifted or one leg off the pad. Red probe on the anode.
Working, it reads
About 0.5 to 0.8 V anode to cathode, and open the other way. Small switching diodes read about 0.6 to 0.7 V; large rectifiers can read a little lower.
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: failed open.
- A reading the wrong way round as well: 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 three-pin body can hold two diodes. With a common pin they read two junctions from that pin, just like a transistor; in series they read two drops end to end. Test each pair the datasheet names.
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.
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.
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.
Printed with a code easy to misread as B
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 B
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 5,306 more parts.
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