SMD code RY
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.
42 parts are printed RY
Not sure which one you have?
Answer up to 4 quick questions and these 42 parts are ranked, with a meter test that settles it. It works on a dead part too.
CHT858BWGPSOT-323PNP transistor, 3 pins, ChenmkoPNP transistorSOT-3233 pinsChenmko
- What it is
- PNP transistor
- Maker
- Chenmko
- Package
- SOT-323
- Pins
- 3
- Details
- PNP General Purpose Transistor, 30 V, 0.1 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
NUP4108W5SOT-23-5ESD protection diode, 5 pins, onsemiESD protection diodeSOT-23-55 pinsonsemi
- What it is
- ESD protection diode
- Maker
- onsemi
- Package
- SOT-23-5
- Pins
- 5
- Details
- Low Capacitance Quad Array for ESD Protection
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
RV2C002UNSOT-883N-channel MOSFET, 3 pins, ROHMN-channel MOSFETSOT-8833 pinsROHM
- What it is
- N-channel MOSFET
- Maker
- ROHM
- Package
- SOT-883
- Pins
- 3
- Details
- Nch 20V 180mA Small Signal MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: N-channel MOSFET.
SMAJ100SMATVS diode, 2 pins, DOWOTVS diodeSMA2 pinsDOWO
- What it is
- TVS diode
- Maker
- DOWO
- Package
- SMA
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
2SA1024-YSOT-89PNP transistor, 3 pins, ToshibaPNP transistorSOT-893 pinsToshiba
- What it is
- PNP transistor
- Maker
- Toshiba
- Package
- SOT-89
- Pins
- 3
- Details
- Si-pnp: GP, 30V, 800mA, 500mW, B=160..320, 120MHz
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
2SA1204SOT-89PNP transistor, 3 pins, Galaxy MicroelectronicsPNP transistorSOT-893 pinsGalaxy Microelectronics
- What it is
- PNP transistor
- Maker
- Galaxy Microelectronics
- Package
- SOT-89
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
2SA1204-YSOT-89PNP transistor, 3 pins, ToshibaPNP transistorSOT-893 pinsToshiba
- What it is
- PNP transistor
- Maker
- Toshiba
- Package
- SOT-89
- Pins
- 3
- Details
- Si-pnp: GP, 35V, 800mA, 500mW, B=120..240, 120MHz
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
2SA1204YSOT-893 pins, ToshibaNot recordedSOT-893 pinsToshiba
- What it is
- Not recorded
- Maker
- Toshiba
- Package
- SOT-89
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SA1664SOT-89PNP transistor, 3 pins, Galaxy MicroelectronicsPNP transistorSOT-893 pinsGalaxy Microelectronics
- What it is
- PNP transistor
- Maker
- Galaxy Microelectronics
- Package
- SOT-89
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
2SA1664-YSOT-893 pins, Transys ElectronicsNot recordedSOT-893 pinsTransys Electronics
- What it is
- Not recorded
- Maker
- Transys Electronics
- Package
- SOT-89
- Pins
- 3
- Details
- Si-pnp: AF, Sw, 35V, 800mA, 500mW, 120MHz, B=160..320
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SC2715-YSOT-23RF transistor, 3 pins, ToshibaRF transistorSOT-233 pinsToshiba
- What it is
- RF transistor
- Maker
- Toshiba
- Package
- SOT-23
- Pins
- 3
- Details
- Si-npn: VHF Mix/Osc, 35V, 50mA, 0,15W, B=120..240, 100..400MHz
- Source
- Published code list
Is it dead? The meter test is below: Bipolar transistor.
2SC2715YSOT-233 pins, ToshibaNot recordedSOT-233 pinsToshiba
- What it is
- Not recorded
- Maker
- Toshiba
- Package
- SOT-23
- Pins
- 3
- Details
- npn am/fm mixer band hfe 120-240
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SC5534SOT-3434 pins, Sanyo ElectricNot recordedSOT-3434 pinsSanyo Electric
- What it is
- Not recorded
- Maker
- Sanyo Electric
- Package
- SOT-343
- Pins
- 4
- Details
- Si-npn: UHF-S-Band, LN, 9V, 30mA, 150mW, B=90..200, 13GHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
2 more parts have no package on record
2SC3898Digital transistor (NPN, resistors built in), Sanyo ElectricDigital transistor (NPN, resistors built in)Not recordedNot recordedSanyo Electric
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- Sanyo Electric
- Package
- Not recorded
- Pins
- Not recorded
- Details
- NPN transistor: Sw, 50V, 100mA, 200mW, 250MHz, B>100, R1=47k
- Source
- Published code list
Is it dead? The meter test is below: Digital transistor.
2SC5541Sanyo ElectricNot recordedNot recordedNot recordedSanyo Electric
- What it is
- Not recorded
- Maker
- Sanyo Electric
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Si-npn: UHF-S-Band, LN, 9V, 30mA, 100mW, B=90..200, 13GHz
- 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.
PNP transistor
Diode range, part lifted or its base leg off the pad.
Working, it reads
Black probe on the base reads about 0.6 to 0.75 V to the emitter and to the collector, and open the other way round. Collector to emitter reads open both ways.
Dead, it reads
- Collector to emitter the same both ways, near 0 V with a continuous beep: shorted. The commonest failure.
- The base the same both ways to another pin, near 0 V or a middling value: a shorted junction.
- Only one junction reads, or none: a junction has failed open. It then looks like a diode.
- A reading the wrong way round, where it should be open: 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 pair of diodes with a common pin reads just like a transistor, and some transistors carry a built-in diode or resistor. The datasheet says which.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
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.
N-channel MOSFET
Diode range, part lifted. Test drain to source first, then short gate to source and test again.
Working, it reads
Red probe on the source, black on the drain: about 0.4 to 0.9 V, the body diode. Open the other way. The gate reads open to both other pins, both ways.
Dead, it reads
- Drain to source the same both ways, near 0 V with a continuous beep, and still so after shorting gate to source: shorted. The classic failure.
- The gate reads low to source or drain: gate shorted. Often all three pins end up shorted together.
- No body diode at all: failed open.
- On the board
- the gate usually has a resistor to the source, so gate to source reads that resistor, which is not a fault. A drain short can be the load. Lift a leg to be sure.
- 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 diode range can charge the gate enough to turn the part on, and then drain to source reads near 0 both ways on a good part. Short gate to source and test again before you condemn it.
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.
Bipolar transistor
Diode range, part lifted or its base leg off the pad.
Working, it reads
From the base, one probe colour reads about 0.6 to 0.75 V to the emitter and to the collector, and open the other way round. Collector to emitter reads open both ways.
Dead, it reads
- Collector to emitter the same both ways, near 0 V with a continuous beep: shorted. The commonest failure.
- The base the same both ways to another pin, near 0 V or a middling value: a shorted junction.
- Only one junction reads, or none: a junction has failed open. It then looks like a diode.
- A reading the wrong way round, where it should be open: 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 pair of diodes with a common pin reads just like a transistor, and some transistors carry a built-in diode or resistor. The datasheet says which.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Digital transistor
Ohms range, part lifted. The datasheet gives the built-in resistors: R1 in series with the base, R2 from base to emitter.
Working, it reads
Base to emitter reads about R1 plus R2 either way round, about 20 kΩ on a 10 k and 10 k part, give or take their wide tolerance. Collector to emitter reads open. A part with no R2 reads a junction behind R1 one way instead.
Dead, it reads
- Collector to emitter the same both ways, near 0 Ω with a continuous beep: shorted.
- From the base, open or far above R1 plus R2: R1 has failed. Static damage shows here most often.
- Base to emitter near 0 Ω: failed short.
- 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:
- The readings depend on the resistor values, so an identical part elsewhere on the board is the surest reference. Measure it the same way.
- Watch for:
- On the diode range a good part with 10 kΩ resistors reads open on every pair, so a good part looks dead there. Use the ohms range.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Codes that begin with RY
For a marking with its end worn or burnt off. Each code has a page of its own.
Codes not listed here are printed on 20 more parts.
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