SMD code Y8y
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, y, is lower case, which on NXP and Philips parts is a date or factory code, so it was set aside and Y8 was searched.
82 parts are printed Y8y
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.
BZT52C27WTSOD-523Zener diode, 2 pins, Taitron ComponentsZener diodeSOD-5232 pinsTaitron Components
- What it is
- Zener diode
- Maker
- Taitron Components
- Package
- SOD-523
- Pins
- 2
- Details
- SMD Zener Diodes (Two Terminals) - 200mW
- Source
- An older or alternative marking, from a published code list
Is it dead? The meter test is below: Zener diode.
BZV49-C22SOT-893 pins, Diodes IncorporatedNot recordedSOT-893 pinsDiodes Incorporated
- What it is
- Not recorded
- Maker
- Diodes Incorporated
- Package
- SOT-89
- Pins
- 3
- Details
- Z-diode: 22V±5%, Izt=5mA, 1W
- Source
- Published code list
Is it dead? The meter test is below: Silicon diode.
BZV49C22SOT-893 pinsNot recordedSOT-893 pinsNot recorded
- What it is
- Not recorded
- Maker
- Not recorded
- Package
- SOT-89
- Pins
- 3
- Details
- 1W zener 22V ±5%
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
BZX84-A22SOT-23Zener diode, 3 pins, Central SemiconductorZener diodeSOT-233 pinsCentral Semiconductor
- What it is
- Zener diode
- Maker
- Central Semiconductor
- Package
- SOT-23
- Pins
- 3
- Details
- 22 V ±1% voltage regulator (Zener) diode
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
BZX84-B22SOT-23Zener diode, 3 pins, Central SemiconductorZener diodeSOT-233 pinsCentral Semiconductor
- What it is
- Zener diode
- Maker
- Central Semiconductor
- Package
- SOT-23
- Pins
- 3
- Details
- 22 V ±2% voltage regulator (Zener) diode
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
BZX84-C22-VSOT-233 pins, Central SemiconductorNot recordedSOT-233 pinsCentral Semiconductor
- What it is
- Not recorded
- Maker
- Central Semiconductor
- Package
- SOT-23
- Pins
- 3
- Details
- Z-diode: 22V±5%, Zzt=20Ω(55mA), 300mW
- Source
- Published code list
Is it dead? The meter test is below: Silicon diode.
BZX84C22LT1SOT-23Zener diode, 3 pins, onsemiZener diodeSOT-233 pinsonsemi
- What it is
- Zener diode
- Maker
- onsemi
- Package
- SOT-23
- Pins
- 3
- Details
- Zener diode: 20.8..23.3V, Zzt=55, Izt=5mA, 225mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
BZX84C22LT1GSOT-23Zener diode, 3 pins, onsemiZener diodeSOT-233 pinsonsemi
- What it is
- Zener diode
- Maker
- onsemi
- Package
- SOT-23
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
BZX88-C22SOT-233 pins, Ferranti SemiconductorsNot recordedSOT-233 pinsFerranti Semiconductors
- What it is
- Not recorded
- Maker
- Ferranti Semiconductors
- Package
- SOT-23
- Pins
- 3
- Details
- Z-diode: 22V±5%, 200mW
- Source
- Published code list
Is it dead? The meter test is below: Silicon diode.
BZX384C4V7-V-GSOD-323Zener diode, 2 pins, VishayZener diodeSOD-3232 pinsVishay
- What it is
- Zener diode
- Maker
- Vishay
- Package
- SOD-323
- Pins
- 2
- Details
- Zener diode: 4.7V±5%, Izt=5mA, Zzt=50, 200mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
CMDZ5260BSOD-323Zener diode, 2 pins, Central SemiconductorZener diodeSOD-3232 pinsCentral Semiconductor
- What it is
- Zener diode
- Maker
- Central Semiconductor
- Package
- SOD-323
- Pins
- 2
- Details
- Z-diode: 43V±5%, 3.0mA, Zzt=93Ω, 250mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
CMSZDA22VSOT-323Zener diode, 3 pinsZener diodeSOT-3233 pinsNot recorded
- What it is
- Zener diode
- Maker
- Not recorded
- Package
- SOT-323
- Pins
- 3
- Details
- Z-diode: Dual, 20.8..23.3V, Zzt=55Ω, 7.6mA, 275mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
3 more parts have no package on record
BZX84C22-VZener diode, VishayZener diodeNot recordedNot recordedVishay
- What it is
- Zener diode
- Maker
- Vishay
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
CGY63RF amplifier (MMIC), 5 pins, InfineonRF amplifier (MMIC)Not recorded5 pinsInfineon
- What it is
- RF amplifier (MMIC)
- Maker
- Infineon
- Package
- Not recorded
- Pins
- 5
- Details
- Monolithic microwave IC: GaAs UHF broadband driver amp. 2.7..6V, 0.8...2.5GHz (22dB)
- Source
- Published code list
Is it dead? The meter test is below: RF amplifier.
CGY120InfineonNot recordedNot recordedNot recordedInfineon
- What it is
- Not recorded
- Maker
- Infineon
- Package
- Not recorded
- Pins
- Not recorded
- Details
- GaAs MMIC
- Source
- Published code list
Is it dead? The meter test is below: RF amplifier.
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.
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.
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.
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