SMD code SEs
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.
The last letter, s, is lower case, which on NXP and Philips parts is a date or factory code, so it was set aside and SE was searched.
96 parts are printed SEs
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.
SMAJ110A-AUSMATVS diode, 2 pins, JieJieTVS diodeSMA2 pinsJieJie
- What it is
- TVS diode
- Maker
- JieJie
- Package
- SMA
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SMAJ110A-HFSMATVS diode, 2 pins, ComchipTVS diodeSMA2 pinsComchip
- What it is
- TVS diode
- Maker
- Comchip
- Package
- SMA
- Pins
- 2
- Details
- 110 V 400 W unidirectional TVS diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SMAJ110A-SSMATVS diode, 2 pins, ProTek DevicesTVS diodeSMA2 pinsProTek Devices
- What it is
- TVS diode
- Maker
- ProTek Devices
- Package
- SMA
- Pins
- 2
- Details
- 400 Watt TVS Component
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SS0530SOD-123Schottky diode, 2 pins, DC ComponentsSchottky diodeSOD-1232 pinsDC Components
- What it is
- Schottky diode
- Maker
- DC Components
- Package
- SOD-123
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
TLV70730PDQNX2SONLDO regulator, 4 pins, Texas InstrumentsLDO regulatorX2SON4 pinsTexas Instruments
- What it is
- LDO regulator
- Maker
- Texas Instruments
- Package
- X2SON
- Pins
- 4
- Details
- 200-mA, Low-IQ, Low-Noise, Low-Dropout Regulator for Portable Devices
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Voltage regulator.
TV04A111J-HFSMATVS diode, 2 pins, ComchipTVS diodeSMA2 pinsComchip
- What it is
- TVS diode
- Maker
- Comchip
- Package
- SMA
- Pins
- 2
- Details
- 110 V 400 W bidirectional TVS diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
PSBD3D40V1HJSOD-323Schottky diode, 2 pins, PrisemiSchottky diodeSOD-3232 pinsPrisemi
- What it is
- Schottky diode
- Maker
- Prisemi
- Package
- SOD-323
- Pins
- 2
- Details
- Schottky diode, 40 V, 1 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
1SMA26AT3GSMATVS diode, 2 pins, onsemiTVS diodeSMA2 pinsonsemi
- What it is
- TVS diode
- Maker
- onsemi
- Package
- SMA
- Pins
- 2
- Details
- 26V Uni-Directional TVS Diode
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
2SC4703-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: µW, 25V, 150mA, 1.8W, 6GHz, B=125..250
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SC4703SESOT-893 pins, RenesasNot recordedSOT-893 pinsRenesas
- What it is
- Not recorded
- Maker
- Renesas
- Package
- SOT-89
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SC5210-ESOT-893 pins, Isahaya ElectronicsNot recordedSOT-893 pinsIsahaya Electronics
- What it is
- Not recorded
- Maker
- Isahaya Electronics
- Package
- SOT-89
- Pins
- 3
- Details
- Si-npn: TV-Vid, 300V, 100mA, 500mW, 80MHz, B=150..300
- Source
- Published code list
Is it dead? The meter test is below: This part.
4 more parts have no package on record
SMF110A-MFLTVS diode, Formosa MicrosemiTVS diodeNot recordedNot recordedFormosa Microsemi
- What it is
- TVS diode
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
1SMA26ATVS diode, onsemiTVS diodeNot recordedNot recordedonsemi
- What it is
- TVS diode
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- TVS: 26V±5%, 9.5A, 400W (1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
1SMA26CATVS diode, onsemiTVS diodeNot recordedNot recordedonsemi
- What it is
- TVS diode
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- TVS: 26V±5%, 9.5A, 400W (1ms), Bidirectional
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
2SC4703RenesasNot recordedNot recordedNot recordedRenesas
- What it is
- Not recorded
- Maker
- Renesas
- Package
- Not recorded
- Pins
- Not recorded
- Details
- npn RF 1.8W fT 6GHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
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.
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.
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.
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