SMD code SE-
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.
90 parts are printed SE-
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.
2SC5338-ESOT-893 pins, NEC ElectronicsNot recordedSOT-893 pinsNEC Electronics
- What it is
- Not recorded
- Maker
- NEC Electronics
- Package
- SOT-89
- Pins
- 3
- Details
- Si-npn: UHF, CATV, 25V, 150mA, 1.8W, 6GHz, B=125..250
- Source
- Published code list
Is it dead? The meter test is below: This part.
AP7313-20SRSOT-23LDO regulator, 3 pins, Diodes IncorporatedLDO regulatorSOT-233 pinsDiodes Incorporated
- What it is
- LDO regulator
- Maker
- Diodes Incorporated
- Package
- SOT-23
- Pins
- 3
- Details
- Linear voltage regulator IC: LDO, 2.0V±2%, 150mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
ASM809SEURSOT-23Voltage supervisor, 3 pins, Alliance SemiconductorVoltage supervisorSOT-233 pinsAlliance Semiconductor
- What it is
- Voltage supervisor
- Maker
- Alliance Semiconductor
- Package
- SOT-23
- 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.
AX6905ERSOT-23Voltage supervisor, 3 pins, AXElite TechnologyVoltage supervisorSOT-233 pinsAXElite Technology
- What it is
- Voltage supervisor
- Maker
- AXElite Technology
- Package
- SOT-23
- 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.
AX6906HRSOT-23Voltage supervisor, 3 pins, AXElite TechnologyVoltage supervisorSOT-233 pinsAXElite Technology
- What it is
- Voltage supervisor
- Maker
- AXElite Technology
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 2.70V±1.5%, +Reset PPO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
BCT2203EUK80-TRSOT-23-5LDO regulator, 5 pins, Broadchip Technology GroupLDO regulatorSOT-23-55 pinsBroadchip Technology Group
- What it is
- LDO regulator
- Maker
- Broadchip Technology Group
- Package
- SOT-23-5
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 8.0V±2%, 150mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
BCT2203EUR80-TRSOT-23LDO regulator, 3 pins, Broadchip Technology GroupLDO regulatorSOT-233 pinsBroadchip Technology Group
- What it is
- LDO regulator
- Maker
- Broadchip Technology Group
- Package
- SOT-23
- Pins
- 3
- Details
- Linear voltage regulator IC: LDO, 8.0V±2%, 150mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
BSS159SOT-233 pins, InfineonNot recordedSOT-233 pinsInfineon
- What it is
- Not recorded
- Maker
- Infineon
- Package
- SOT-23
- Pins
- 3
- Details
- n-MOS-d: V-MOS, 50V, 0,16A, <8Ω(70mA)
- Source
- Published code list
Is it dead? The meter test is below: This part.
CD214A-T110ASMATVS diode, 2 pins, BournsTVS diodeSMA2 pinsBourns
- What it is
- TVS diode
- Maker
- Bourns
- Package
- SMA
- Pins
- 2
- Details
- TVS: 110V, 2.3A, 400W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
CH451H-30PTSOD-3232 pins, Chenmko EnterpriseNot recordedSOD-3232 pinsChenmko Enterprise
- What it is
- Not recorded
- Maker
- Chenmko Enterprise
- Package
- SOD-323
- Pins
- 2
- Details
- Diode: SBD, 30V, 500mA, Vf<0.55V(500mA)
- Source
- Published code list
Is it dead? The meter test is below: Silicon diode.
EC76SMAJ110ASMATVS diode, 2 pins, E-CMOSTVS diodeSMA2 pinsE-CMOS
- What it is
- TVS diode
- Maker
- E-CMOS
- Package
- SMA
- Pins
- 2
- Details
- Transient voltage supressor: Vbr=122..135V, Vrwm=110V, Ipp=1.7A, 400W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
LD6919GU-28SOT-363LDO regulator, 6 pins, LeadtrendLDO regulatorSOT-3636 pinsLeadtrend
- What it is
- LDO regulator
- Maker
- Leadtrend
- Package
- SOT-363
- Pins
- 6
- Details
- Linear voltage regulator IC: LDO, Ultra-LN, Soft start, 2.8V±2%, 500mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
3 more parts have no package on record
2SC5338SE4 pins, RenesasNot recordedNot recorded4 pinsRenesas
- What it is
- Not recorded
- Maker
- Renesas
- Package
- Not recorded
- Pins
- 4
- Source
- Published code list
Is it dead? The meter test is below: This part.
IXD5127C24GNRVoltage supervisor, IXYSVoltage supervisorNot recordedNot recordedIXYS
- What it is
- Voltage supervisor
- Maker
- IXYS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 2.4V±0.8%, +Reset PPO, -MR, 100ms Rt delay
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
LT4ME110ATVS diode, Lite-On SemiconductorTVS diodeNot recordedNot recordedLite-On Semiconductor
- What it is
- TVS diode
- Maker
- Lite-On Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Transient voltage supressor: Vrwm=110V, Vbr=122..135V, Ipp=2.3A, 400W(1ms)
- Source
- Published code list
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.
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.
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.
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.
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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