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.
ASMAJ110A-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.
ATV04A111J-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.
B0530WSOD-123Schottky diode, 2 pins, Galaxy MicroelectronicsSchottky diodeSOD-1232 pinsGalaxy Microelectronics
- What it is
- Schottky diode
- Maker
- Galaxy Microelectronics
- Package
- SOD-123
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
B0530W-Q1SOD-123FSchottky diode, 2 pins, Formosa MicrosemiSchottky diodeSOD-123F2 pinsFormosa Microsemi
- What it is
- Schottky diode
- Maker
- Formosa Microsemi
- Package
- SOD-123F
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
B0530WFSOD-123FSchottky diode, 2 pins, Taiwan SemiconductorSchottky diodeSOD-123F2 pinsTaiwan Semiconductor
- What it is
- Schottky diode
- Maker
- Taiwan Semiconductor
- Package
- SOD-123F
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
B0530WFLSOD-323Schottky diode, 2 pins, YFWSchottky diodeSOD-3232 pinsYFW
- What it is
- Schottky diode
- Maker
- YFW
- Package
- SOD-323
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
B0530WSSOD-323Schottky diode, 2 pins, Galaxy MicroelectronicsSchottky diodeSOD-3232 pinsGalaxy Microelectronics
- What it is
- Schottky diode
- Maker
- Galaxy Microelectronics
- Package
- SOD-323
- Pins
- 2
- Details
- 0.5A, 30V, Surface Mount Small Signal Schottky Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
B0530WS-Q1SOD-323Schottky diode, 2 pins, Formosa MicrosemiSchottky diodeSOD-3232 pinsFormosa Microsemi
- What it is
- Schottky diode
- Maker
- Formosa Microsemi
- Package
- SOD-323
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
BGU7033SOT-363RF amplifier (MMIC), 6 pins, NXPRF amplifier (MMIC)SOT-3636 pinsNXP
- What it is
- RF amplifier (MMIC)
- Maker
- NXP
- Package
- SOT-363
- Pins
- 6
- Details
- 1 GHz wideband low-noise amplifier with bypass
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: RF amplifier.
BZX84J-B18SOD-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
- 18 V ±2% voltage regulator (Zener) diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
CDBW0530-HFSOD-123Schottky diode, 2 pins, ComchipSchottky diodeSOD-1232 pinsComchip
- What it is
- Schottky diode
- Maker
- Comchip
- Package
- SOD-123
- Pins
- 2
- Details
- 30 V, 0.5 A Schottky barrier diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
CH451H-30GPSOD-323Schottky diode, 2 pins, ChenmkoSchottky diodeSOD-3232 pinsChenmko
- What it is
- Schottky diode
- Maker
- Chenmko
- Package
- SOD-323
- Pins
- 2
- Details
- SCHOTTKY BARRIER DIODE, 30 V, 0.5 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
F4TVS110ASOD-123FTVS diode, 2 pins, Good-ArkTVS diodeSOD-123F2 pinsGood-Ark
- What it is
- TVS diode
- Maker
- Good-Ark
- Package
- SOD-123F
- Pins
- 2
- Details
- TVS diode, 400 W
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
GSB0530WSOD-123Schottky diode, 2 pins, Good-ArkSchottky diodeSOD-1232 pinsGood-Ark
- What it is
- Schottky diode
- Maker
- Good-Ark
- Package
- SOD-123
- Pins
- 2
- Details
- Schottky diode, 30 V, 500 mA
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
GSB0530WSSOD-323Schottky diode, 2 pins, Good-ArkSchottky diodeSOD-3232 pinsGood-Ark
- What it is
- Schottky diode
- Maker
- Good-Ark
- Package
- SOD-323
- Pins
- 2
- Details
- Schottky diode, 30 V, 500 mA
- 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.
RF amplifier
Voltage, board powered, on the output pin that the bias resistor or choke feeds.
Working, it reads
The output pin sits at the device voltage the datasheet gives, a few volts, below the supply.
Dead, it reads
- Output pin at 0 V, or near 0 Ω to ground with the power off: shorted inside.
- Output pin at the full supply voltage: open inside, no current flowing.
- On the board:
- Measured on the board with power on; the bias network is part of the reading.
- 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 figures depend on the part and its bias resistor. The datasheet gives both.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
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.
Printed with a code easy to misread as SEs
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 10 more parts.
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Open this in the search to correct a character or try another package.