SMD code N-
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.
114 parts are printed N-
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.
PESD12LCBSOD-882ESD protection diode, 2 pins, ProTek DevicesESD protection diodeSOD-8822 pinsProTek Devices
- What it is
- ESD protection diode
- Maker
- ProTek Devices
- Package
- SOD-882
- Pins
- 2
- Details
- Low Capacitance TVS Array
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
PS1103-D32DFN0603-2ESD protection diode, 2 pins, PanjitESD protection diodeDFN0603-22 pinsPanjit
- What it is
- ESD protection diode
- Maker
- Panjit
- Package
- DFN0603-2
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
PSD18CSOD-323ESD protection diode, 2 pins, ProTek DevicesESD protection diodeSOD-3232 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.
PSD18C-LF-T7SOD-3232 pins, UMWNot recordedSOD-3232 pinsUMW
- What it is
- Not recorded
- Maker
- UMW
- Package
- SOD-323
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: This part.
RB531S-30SOD-523Schottky diode, 2 pins, Galaxy MicroelectronicsSchottky diodeSOD-5232 pinsGalaxy Microelectronics
- What it is
- Schottky diode
- Maker
- Galaxy Microelectronics
- Package
- SOD-523
- Pins
- 2
- Details
- 0.1A, 30V, Surface Mount Small Signal Schottky Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
RB531SM-30SOD-523Schottky diode, 2 pins, ROHMSchottky diodeSOD-5232 pinsROHM
- What it is
- Schottky diode
- Maker
- ROHM
- Package
- SOD-523
- Pins
- 2
- Details
- Schottky Barrier Diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
RB531SM-30FHSOD-523Schottky diode, 2 pins, ROHMSchottky diodeSOD-5232 pinsROHM
- What it is
- Schottky diode
- Maker
- ROHM
- Package
- SOD-523
- Pins
- 2
- Details
- Schottky Barrier Diode (AEC-Q101 qualified)
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
RB560VM-40SOD-323Schottky diode, 2 pins, ROHMSchottky diodeSOD-3232 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.
RB560VM-40FHSOD-323Schottky diode, 2 pins, ROHMSchottky diodeSOD-3232 pinsROHM
- What it is
- Schottky diode
- Maker
- ROHM
- Package
- SOD-323
- Pins
- 2
- Details
- Schottky Barrier Diode (AEC-Q101 qualified)
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
RSBC6.8CMSOD-923ESD protection diode, 2 pins, ROHMESD protection diodeSOD-9232 pinsROHM
- What it is
- ESD protection diode
- Maker
- ROHM
- Package
- SOD-923
- Pins
- 2
- Details
- Transient Voltage Suppressor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
S-LDAN202KLT1GSOT-23Switching diode, 3 pins, LRCSwitching diodeSOT-233 pinsLRC
- What it is
- Switching diode
- Maker
- LRC
- Package
- SOT-23
- Pins
- 3
- Details
- Switching diode, VR 80 V, IF 100 mA, VF Max 1.2 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
S-LDAN202UT1GSOT-323Switching diode, 3 pins, LRCSwitching diodeSOT-3233 pinsLRC
- What it is
- Switching diode
- Maker
- LRC
- Package
- SOT-323
- Pins
- 3
- Details
- Switching diode, VR 80 V, IF 100 mA, VF Max 1.2 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
SCS202NKSOT-23Switching diode, 3 pins, SeCoSSwitching diodeSOT-233 pinsSeCoS
- What it is
- Switching diode
- Maker
- SeCoS
- Package
- SOT-23
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
2 more parts have no package on record
PHS518CESD protection diode, ProTek DevicesESD protection diodeNot recordedNot recordedProTek Devices
- What it is
- ESD protection diode
- Maker
- ProTek Devices
- Package
- Not recorded
- Pins
- Not recorded
- Details
- High Powered Surge Protection TVS Array
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
PMEG4002AESFSchottky diode, 2 pins, NexperiaSchottky diodeNot recorded2 pinsNexperia
- What it is
- Schottky diode
- Maker
- Nexperia
- Package
- Not recorded
- Pins
- 2
- Details
- 40 V, 0.2 A low VF MEGA Schottky barrier rectifier
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky 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.
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.
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.
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.
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