SMD code Y5-
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.
88 parts are printed Y5-
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.
BZX384C3V6-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: 3.6V±5%, Izt=5mA, Zzt=85, 200mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
CGY59SOT-3636 pins, InfineonNot recordedSOT-3636 pinsInfineon
- What it is
- Not recorded
- Maker
- Infineon
- Package
- SOT-363
- Pins
- 6
- Details
- GaAs 0.9/1.8GHz preamp
- Source
- Published code list
Is it dead? The meter test is below: This part.
CGY59WSOT-363RF amplifier (MMIC), 6 pins, InfineonRF amplifier (MMIC)SOT-3636 pinsInfineon
- What it is
- RF amplifier (MMIC)
- Maker
- Infineon
- Package
- SOT-363
- Pins
- 6
- Details
- Monolithic microwave IC: GaAs UHF preamp. 8V, 0.2...2.5GHz (13dB)
- Source
- Published code list
Is it dead? The meter test is below: RF amplifier.
CMDZ5257BSOD-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: 33V±5%, 3.8mA, Zzt=58Ω, 250mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
CMSZDA16VSOT-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, 15.3..17.1V, Zzt=40Ω, 10mA, 275mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
CZRT55C16SOT-23Zener diode, 3 pins, ComchipZener diodeSOT-233 pinsComchip
- What it is
- Zener diode
- Maker
- Comchip
- Package
- SOT-23
- Pins
- 3
- Details
- Zener diode: 15.3..17.1V, Zzt=40, Izt=5mA, 350mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
ELM7645LBBSOT-23Voltage supervisor, 3 pins, ELM TechnologyVoltage supervisorSOT-233 pinsELM Technology
- What it is
- Voltage supervisor
- Maker
- ELM Technology
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 4.5V±2%, -Reset PPO, Rdt=500ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
FMY5SOT-23-55 pinsNot recordedSOT-23-55 pinsNot recorded
- What it is
- Not recorded
- Maker
- Not recorded
- Package
- SOT-23-5
- Pins
- 5
- Details
- Si-n/p: Dual, GP, 120V, 50mA, 140MHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
MFPZ4741ASOD-123FZener diode, 2 pins, Taitron ComponentsZener diodeSOD-123F2 pinsTaitron Components
- What it is
- Zener diode
- Maker
- Taitron Components
- Package
- SOD-123F
- Pins
- 2
- Details
- Zener diode: 10.5..11.6V, Izt=23.0mA, 1W
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
MM1Z5260BSOD-123FZener diode, 2 pins, EIC SemiconductorZener diodeSOD-123F2 pinsEIC Semiconductor
- What it is
- Zener diode
- Maker
- EIC Semiconductor
- Package
- SOD-123F
- Pins
- 2
- Details
- Zener diode: 40.85..45.15V, Izt=3.0mA, Zzt=93, 500mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
MM1Z5260BHSOD-123Zener diode, 2 pins, Zowie TechnologyZener diodeSOD-1232 pinsZowie Technology
- What it is
- Zener diode
- Maker
- Zowie Technology
- Package
- SOD-123
- Pins
- 2
- Details
- Zener diode: 40.85..45.15V, Izt=3mA, Zzt=93, 500mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
MM5Z16VSOD-523Zener diode, 2 pins, SecZener diodeSOD-5232 pinsSec
- What it is
- Zener diode
- Maker
- Sec
- Package
- SOD-523
- Pins
- 2
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
MMSZ39TSOD-123Zener diode, 2 pins, MotorolaZener diodeSOD-1232 pinsMotorola
- What it is
- Zener diode
- Maker
- Motorola
- Package
- SOD-123
- Pins
- 2
- Details
- Zener diode: 39V±5%, Izt=5mA, Zzt=130, 500mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
PZU18B1A / DGSOD-323Zener diode, 2 pins, NXPZener diodeSOD-3232 pinsNXP
- What it is
- Zener diode
- Maker
- NXP
- Package
- SOD-323
- Pins
- 2
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
1 more part has no package on record
BZX584B43VZener diode, Tak Cheong SemiconductorZener diodeNot recordedNot recordedTak Cheong Semiconductor
- What it is
- Zener diode
- Maker
- Tak Cheong Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Zener diode: 42.14..43.86V, Izt=2mA, Zzt=150, 200mW
- Source
- Published code list
Is it dead? The meter test is below: Zener 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.
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.
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.
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.
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.
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