SMD code FS-
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.
76 parts are printed FS-
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.
T2SA1576A-SSOT-323PNP transistor, 3 pins, Galaxy MicroelectronicsPNP transistorSOT-3233 pinsGalaxy Microelectronics
- What it is
- PNP transistor
- Maker
- Galaxy Microelectronics
- Package
- SOT-323
- Pins
- 3
- Details
- -50V, -0.15A, General Purpose PNP Bipolar Transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
TEP05FSDFN1610-2ESD protection diode, 2 pins, RectronESD protection diodeDFN1610-22 pinsRectron
- What it is
- ESD protection diode
- Maker
- Rectron
- Package
- DFN1610-2
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
Z1SMA130SMAZener diode, 2 pins, Taitron ComponentsZener diodeSMA2 pinsTaitron Components
- What it is
- Zener diode
- Maker
- Taitron Components
- Package
- SMA
- Pins
- 2
- Details
- SMD Zener Diodes (Two Terminals) - 1W
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
2SA1576ASOT-323PNP transistor, 3 pins, HXYPNP transistorSOT-3233 pinsHXY
- What it is
- PNP transistor
- Maker
- HXY
- Package
- SOT-323
- Pins
- 3
- Details
- PNP bipolar transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
2SA177A-SSOT-4163 pins, ROHMNot recordedSOT-4163 pinsROHM
- What it is
- Not recorded
- Maker
- ROHM
- Package
- SOT-416
- Pins
- 3
- Details
- Si-pnp: AF, 50V, 150mA, 200mW, B=270..560, >140MHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SA1034-SSOT-233 pins, PanNot recordedSOT-233 pinsPan
- What it is
- Not recorded
- Maker
- Pan
- Package
- SOT-23
- Pins
- 3
- Details
- Si-pnp: AF, LN, 55V, 10mA, 200mW, B=260..520, 200MHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SA1037AKSOT-23PNP transistor, 3 pins, ROHMPNP transistorSOT-233 pinsROHM
- What it is
- PNP transistor
- Maker
- ROHM
- Package
- SOT-23
- Pins
- 3
- Details
- PNP bipolar transistor
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
2SA1037AK-SSOT-23PNP transistor, 3 pins, ROHMPNP transistorSOT-233 pinsROHM
- What it is
- PNP transistor
- Maker
- ROHM
- Package
- SOT-23
- Pins
- 3
- Details
- Si-pnp: AF, 50V, 150mA, 200mW, B=270..560, >140MHz
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
2SA1531-SSOT-3233 pins, PanNot recordedSOT-3233 pinsPan
- What it is
- Not recorded
- Maker
- Pan
- Package
- SOT-323
- Pins
- 3
- Details
- Si-pnp: AF, LN, 55V, 50mA, 150mW, B=260..520, 80MHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SA1576-SSOT-323PNP transistor, 3 pins, ROHMPNP transistorSOT-3233 pinsROHM
- What it is
- PNP transistor
- Maker
- ROHM
- Package
- SOT-323
- Pins
- 3
- Details
- Si-pnp: GP, 60V, 100mA, 150mW, B=270..560, 140MHz
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
2SA1764SOT-233 pins, Sanyo ElectricNot recordedSOT-233 pinsSanyo Electric
- What it is
- Not recorded
- Maker
- Sanyo Electric
- Package
- SOT-23
- Pins
- 3
- Details
- Si-pnp: Fast-Sw, 15V, 200mA, 200mW, B=50..140, 1GHz, 11/19ns
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SA1774SOT-4163 pinsNot recordedSOT-4163 pinsNot recorded
- What it is
- Not recorded
- Maker
- Not recorded
- Package
- SOT-416
- Pins
- 3
- Details
- Si-pnp: GP, 60V, 100mA, 150mW, B=150..560, 140MHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
3 more parts have no package on record
2SA1037LT1PNP transistorPNP transistorNot recordedNot recordedNot recorded
- What it is
- PNP transistor
- Maker
- Not recorded
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
2SA1576UBPNP transistor, ROHMPNP transistorNot recordedNot recordedROHM
- What it is
- PNP transistor
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
2SA1763Sanyo ElectricNot recordedNot recordedNot recordedSanyo Electric
- What it is
- Not recorded
- Maker
- Sanyo Electric
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Si-pnp: Sw, 15V, 200mA, 150mW, B=50..140, 1GHz
- 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.
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.
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