SMD code FHs
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 FH was searched.
67 parts are printed FHs
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.
2SA1576ASOT-323PNP transistor, 3 pins, Blue RocketPNP transistorSOT-3233 pinsBlue Rocket
- What it is
- PNP transistor
- Maker
- Blue Rocket
- Package
- SOT-323
- Pins
- 3
- Details
- PNP bipolar transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
BCV47SOT-23Transistor, 3 pins, HXYTransistorSOT-233 pinsHXY
- What it is
- Transistor
- Maker
- HXY
- Package
- SOT-23
- Pins
- 3
- Details
- SMD NPN Darlington Transistors
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Darlington transistor.
BCV47,215SOT-23Darlington transistor, 3 pins, HXYDarlington transistorSOT-233 pinsHXY
- What it is
- Darlington transistor
- Maker
- HXY
- Package
- SOT-23
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Darlington transistor.
BFN24SOT-23RF transistor, 3 pins, InfineonRF transistorSOT-233 pinsInfineon
- What it is
- RF transistor
- Maker
- Infineon
- Package
- SOT-23
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
BZX84C20WSOT-323Zener diode, 3 pins, Formosa MicrosemiZener diodeSOT-3233 pinsFormosa Microsemi
- What it is
- Zener diode
- Maker
- Formosa Microsemi
- Package
- SOT-323
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
BZX84C20W-Q1SOT-323Zener diode, 3 pins, Formosa MicrosemiZener diodeSOT-3233 pinsFormosa Microsemi
- What it is
- Zener diode
- Maker
- Formosa Microsemi
- Package
- SOT-323
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
SMV1251-079LFSOD-523Varicap diode, 2 pins, SkyworksVaricap diodeSOD-5232 pinsSkyworks
- What it is
- Varicap diode
- Maker
- Skyworks
- Package
- SOD-523
- Pins
- 2
- Details
- Tuning Varactors
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PIN diode or varicap.
TLV9051IDPWX2SONOperational amplifier, 5 pins, Texas InstrumentsOperational amplifierX2SON5 pinsTexas Instruments
- What it is
- Operational amplifier
- Maker
- Texas Instruments
- Package
- X2SON
- Pins
- 5
- Details
- 5MHz, 15V/µs High Slew-Rate, RRIO Op Amp
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
Z1SMA62SMAZener 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.
1SS366SOT-233 pins, Sanyo ElectricNot recordedSOT-233 pinsSanyo Electric
- What it is
- Not recorded
- Maker
- Sanyo Electric
- Package
- SOT-23
- Pins
- 3
- Details
- Si-diode: Dual, Schottky, UHF-Mixer, 10V, 35mA, <0,85pF
- Source
- Published code list
Is it dead? The meter test is below: Schottky diode.
1SS375SOT-3233 pins, Sanyo ElectricNot recordedSOT-3233 pinsSanyo Electric
- What it is
- Not recorded
- Maker
- Sanyo Electric
- Package
- SOT-323
- Pins
- 3
- Details
- Si-diode: Dual, Schottky, UHF-Mixer, 10V, 35mA, <0,85pF
- Source
- Published code list
Is it dead? The meter test is below: Schottky diode.
2SA1576A-SSOT-323PNP transistor, 3 pins, Foshan Blue Rocket ElectronicsPNP transistorSOT-3233 pinsFoshan Blue Rocket Electronics
- What it is
- PNP transistor
- Maker
- Foshan Blue Rocket Electronics
- Package
- SOT-323
- Pins
- 3
- Details
- -50V, -0.15A, General Purpose PNP Bipolar Transistor
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
AAT3527ICX-3.08-200SOT-143Voltage supervisor, 4 pins, Advanced Analogic TechnologiesVoltage supervisorSOT-1434 pinsAdvanced Analogic Technologies
- What it is
- Voltage supervisor
- Maker
- Advanced Analogic Technologies
- Package
- SOT-143
- Pins
- 4
- Details
- Voltage detector IC: 3.08V±1.5%, +Reset PPO, -MR
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
2 more parts have no package on record
NCP110AMX110LDO regulator, onsemiLDO regulatorNot recordedNot recordedonsemi
- What it is
- LDO regulator
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear Regulator - Low V , Low Noise, High PSRR
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Voltage regulator.
NCP186AMX330LDO regulator, onsemiLDO regulatorNot recordedNot recordedonsemi
- What it is
- LDO regulator
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- LDO Regulator - Fast Transient Response Low Voltage
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Voltage regulator.
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.
Darlington 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 collector and about 1.1 to 1.4 V to the emitter, two junctions in series, and open the other way round. Collector to emitter reads open. Built-in resistors can change these readings.
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.
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.
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.
Voltage regulator
Voltage, board powered, black probe on ground. Then ohms with the power off.
Working, it reads
Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.
Dead, it reads
- Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
- Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
- Power off, input to output near 0 Ω: shorted.
- On the board:
- An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
- Compare:
- The same regulator on another rail or another board shows the right voltages and the right resistances.
- Watch for:
- Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
PIN diode or varicap
Diode range, part lifted or one leg off the pad. Red probe on the anode.
Working, it reads
About 0.6 to 0.9 V anode to cathode, 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.
- 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 varicap that has drifted in capacitance reads normal on a meter. Only a capacitance meter or the tuning itself shows it.
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.
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.
Printed with a code easy to misread as FHs
One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.
Codes that begin with FHs
For a marking with its end worn or burnt off. Each code has a page of its own.
- FHJ7
- FH2JG1
- FHDQ1
- FHEQ1
- FHFQ1
- FHGQ1
- FHJQ1
- FHKQ1
- FHLQ1
- FHNQ1
- FHOQ1
- FHQQ1
- FHRQ1
- FHTQ1
- FHUQ1
- FHVQ1
- FHWQ1
- FHXQ1
- FHZQ1
- FHL14
- FHN12
- FHO6
- FHQ8
- FHR12
- FHT10
- FHU10
- FHV10
- FHW6
- FHX10
- FHZ9
- FH87
- FH18
- FH28
- FH38
- FH48
- FHD11
- FHE11
- FHF11
- FHG5
- FHK13
Codes not listed here are printed on 120 more parts.
Did you find your part?
Open this in the search to correct a character or try another package.