SMD code T3s
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 T3 was searched.
113 parts are printed T3s
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.
HBAS21VMFHTE17SOD-323Switching diode, 2 pins, HXYSwitching diodeSOD-3232 pinsHXY
- What it is
- Switching diode
- Maker
- HXY
- Package
- SOD-323
- Pins
- 2
- Details
- Switching diode, 200 V, 0.2 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
HBAV21WSE308SOD-323Switching diode, 2 pins, HXYSwitching diodeSOD-3232 pinsHXY
- What it is
- Switching diode
- Maker
- HXY
- Package
- SOD-323
- Pins
- 2
- Details
- Switching diode, 200 V, 0.2 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
MM3Z2V7SSOD-323Zener diode, 2 pins, onsemiZener diodeSOD-3232 pinsonsemi
- What it is
- Zener diode
- Maker
- onsemi
- Package
- SOD-323
- Pins
- 2
- Details
- 2.7V, 400mW, Surface Mount Zener Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
MM5Z2V7SSOD-523Zener diode, 2 pins, onsemiZener diodeSOD-5232 pinsonsemi
- What it is
- Zener diode
- Maker
- onsemi
- Package
- SOD-523
- Pins
- 2
- Details
- Zener Voltage Regulators MM5ZxxxST1G Series, SZMM5ZxxxST1G Series
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
MMBD7000SOT-23Switching diode, 3 pins, Taitron ComponentsSwitching diodeSOT-233 pinsTaitron Components
- What it is
- Switching diode
- Maker
- Taitron Components
- Package
- SOT-23
- Pins
- 3
- Details
- 0.2A, 100V, Surface Mount Small Signal Switching Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
MMBD7000WSOT-323Switching diode, 3 pins, PanjitSwitching diodeSOT-3233 pinsPanjit
- What it is
- Switching diode
- Maker
- Panjit
- Package
- SOT-323
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
MMSZ3V0SOD-123Zener diode, 2 pins, onsemiZener diodeSOD-1232 pinsonsemi
- What it is
- Zener diode
- Maker
- onsemi
- Package
- SOD-123
- Pins
- 2
- Details
- Zener Voltage Regulators MMSZxxxT1G Series, SZMMSZxxxT1G Series
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
SM230FLSOD-123FSchottky diode, 2 pins, SeCoSSchottky diodeSOD-123F2 pinsSeCoS
- What it is
- Schottky diode
- Maker
- SeCoS
- Package
- SOD-123F
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
TBAV21LSOD-882Switching diode, 2 pins, Galaxy MicroelectronicsSwitching diodeSOD-8822 pinsGalaxy Microelectronics
- What it is
- Switching diode
- Maker
- Galaxy Microelectronics
- Package
- SOD-882
- Pins
- 2
- Details
- 0.2A, 200V, Surface Mount Small Signal Switching Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
TBAV21WSOD-123Switching diode, 2 pins, Galaxy MicroelectronicsSwitching diodeSOD-1232 pinsGalaxy Microelectronics
- What it is
- Switching diode
- Maker
- Galaxy Microelectronics
- Package
- SOD-123
- Pins
- 2
- Details
- 0.2A, 200V, Surface Mount Small Signal Switching Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
TBAV21WSSOD-323Switching diode, 2 pins, Galaxy MicroelectronicsSwitching diodeSOD-3232 pinsGalaxy Microelectronics
- What it is
- Switching diode
- Maker
- Galaxy Microelectronics
- Package
- SOD-323
- Pins
- 2
- Details
- 0.2A, 200V, Surface Mount Small Signal Switching Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
TBAV21WTSOD-523Switching diode, 2 pins, Galaxy MicroelectronicsSwitching diodeSOD-5232 pinsGalaxy Microelectronics
- What it is
- Switching diode
- Maker
- Galaxy Microelectronics
- Package
- SOD-523
- Pins
- 2
- Details
- 0.2A, 200V, Surface Mount Small Signal Switching Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
BAS21SHSOD-123Switching diode, 2 pins, CYStekSwitching diodeSOD-1232 pinsCYStek
- What it is
- Switching diode
- Maker
- CYStek
- Package
- SOD-123
- Pins
- 2
- Details
- 250 V switching diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
1SV186SOD-1232 pins, ToshibaNot recordedSOD-1232 pinsToshiba
- What it is
- Not recorded
- Maker
- Toshiba
- Package
- SOD-123
- Pins
- 2
- Details
- C-diode: UHF/SHF-Tuning, 3,3..4,5pF(2V)
- Source
- Published code list
Is it dead? The meter test is below: Silicon diode.
1 more part has no package on record
SCS21DSTL-CSwitching diode, SeCoSSwitching diodeNot recordedNot recordedSeCoS
- What it is
- Switching diode
- Maker
- SeCoS
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon 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.
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.
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.
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.
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