SMD code SU-
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.
27 parts are printed SU-
Not sure which one you have?
Answer up to 4 quick questions and these 27 parts are ranked, with a meter test that settles it. It works on a dead part too.
BZX84J-B3V3SOD-323Zener diode, 2 pins, NexperiaZener diodeSOD-3232 pinsNexperia
- What it is
- Zener diode
- Maker
- Nexperia
- Package
- SOD-323
- Pins
- 2
- Pinout
- 1 cathode
- 2 anode
- Details
- 3.3 V ±2% voltage regulator (Zener) diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
PTVSHC1RF190VUHSOD-123FTVS diode, 2 pins, PrisemiTVS diodeSOD-123F2 pinsPrisemi
- What it is
- TVS diode
- Maker
- Prisemi
- Package
- SOD-123F
- Pins
- 2
- Details
- TVS diode, 190 V working
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SMAJ190SMATVS diode, 2 pins, DOWOTVS diodeSMA2 pinsDOWO
- What it is
- TVS diode
- Maker
- DOWO
- Package
- SMA
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SMAJ190ASMATVS diode, 2 pins, HXYTVS diodeSMA2 pinsHXY
- What it is
- TVS diode
- Maker
- HXY
- Package
- SMA
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SMAJ190A/TR13SMATVS diode, 2 pins, HXYTVS diodeSMA2 pinsHXY
- What it is
- TVS diode
- Maker
- HXY
- Package
- SMA
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
APX810S05-46SR-7SOT-23Voltage supervisor, 3 pins, Diodes IncorporatedVoltage supervisorSOT-233 pinsDiodes Incorporated
- What it is
- Voltage supervisor
- Maker
- Diodes Incorporated
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 4.63V±1.5%, +Reset PPO, Rdt=50ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
ASM812JEUSSOT-143Voltage supervisor, 4 pins, Alliance SemiconductorVoltage supervisorSOT-1434 pinsAlliance Semiconductor
- What it is
- Voltage supervisor
- Maker
- Alliance Semiconductor
- Package
- SOT-143
- Pins
- 4
- Details
- Voltage detector IC: 4.0V±1.5%, +Reset PPO, -MR
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
AX6905EASOT-323Voltage supervisor, 3 pins, AXElite TechnologyVoltage supervisorSOT-3233 pinsAXElite Technology
- What it is
- Voltage supervisor
- Maker
- AXElite Technology
- Package
- SOT-323
- 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.
CH035H-20GPSOD-3232 pins, Chenmko EnterpriseNot recordedSOD-3232 pinsChenmko Enterprise
- What it is
- Not recorded
- Maker
- Chenmko Enterprise
- Package
- SOD-323
- Pins
- 2
- Details
- Diode: SBD, 20V, 350mA, Vf<0.6V(200mA), 10ns
- Source
- Published code list
Is it dead? The meter test is below: Silicon diode.
KIC7S14FUSOT-233 pins, KECNot recordedSOT-233 pinsKEC
- What it is
- Not recorded
- Maker
- KEC
- Package
- SOT-23
- Pins
- 3
- Details
- CMOS-Logic: Inverting Schmitt-trigger
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
P4SMA62CSMA2 pins, FagNot recordedSMA2 pinsFag
- What it is
- Not recorded
- Maker
- Fag
- Package
- SMA
- Pins
- 2
- Details
- TVS: 6,2V, 4,7A, 400W (1ms), Bidirectional
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
P4SMAJ190SMA2 pins, PanjitNot recordedSMA2 pinsPanjit
- What it is
- Not recorded
- Maker
- Panjit
- Package
- SMA
- Pins
- 2
- Details
- TVS: 190V, 1.2A, 400W (1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
P4SMAJ215SMATVS diode, 2 pins, Frontier ElectronicsTVS diodeSMA2 pinsFrontier Electronics
- What it is
- TVS diode
- Maker
- Frontier Electronics
- Package
- SMA
- Pins
- 2
- Details
- Transient voltage supressor: Vrwm=215V, Vbr=238..286V, Ipp=0.80A, 400W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
2 more parts have no package on record
74AUP2G3404FW4Diodes IncorporatedNot recordedNot recordedNot recordedDiodes Incorporated
- What it is
- Not recorded
- Maker
- Diodes Incorporated
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS logic IC: Inverting buffer with open-drain and inverter
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
IXD5127C46GNRVoltage supervisor, IXYSVoltage supervisorNot recordedNot recordedIXYS
- What it is
- Voltage supervisor
- Maker
- IXYS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 4.6V±0.8%, +Reset PPO, -MR, 100ms Rt delay
- 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.
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.
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.
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.
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.
Printed with a code easy to misread as SU-
One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.
Codes not listed here are printed on 1 more part.
Did you find your part?
Open this in the search to correct a character or try another package.