SMD code -1F
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.
148 parts are printed -1F
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.
WT847BSOT-233 pins, WayonNot recordedSOT-233 pinsWayon
- What it is
- Not recorded
- Maker
- Wayon
- Package
- SOT-23
- Pins
- 3
- Details
- Bipolar transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
WT847BWSOT-3233 pins, WayonNot recordedSOT-3233 pinsWayon
- What it is
- Not recorded
- Maker
- Wayon
- Package
- SOT-323
- Pins
- 3
- Details
- Bipolar transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
BTC4081S3SOT-323NPN transistor, 3 pins, CYStekNPN transistorSOT-3233 pinsCYStek
- What it is
- NPN transistor
- Maker
- CYStek
- Package
- SOT-323
- Pins
- 3
- Details
- 65 V, 0.15 A NPN transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: NPN transistor.
2SC4543SOT-89NPN transistor, 3 pins, PanasonicNPN transistorSOT-893 pinsPanasonic
- What it is
- NPN transistor
- Maker
- Panasonic
- Package
- SOT-89
- Pins
- 3
- Details
- NPN transistor: Vid, 110V, 300mA, 1W, B>20, 350MHz
- Source
- Published code list
Is it dead? The meter test is below: NPN transistor.
7UL1T34FSSOT-9535 pins, ToshibaNot recordedSOT-9535 pinsToshiba
- What it is
- Not recorded
- Maker
- Toshiba
- Package
- SOT-953
- Pins
- 5
- Details
- CMOS logic IC: Noninverting buffer with level shifting
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
7UL1T34FUSOT-3535 pins, ToshibaNot recordedSOT-3535 pinsToshiba
- What it is
- Not recorded
- Maker
- Toshiba
- Package
- SOT-353
- Pins
- 5
- Details
- CMOS logic IC: Noninverting buffer with level shifting
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
BC847BDW1T1SOT-3636 pins, onsemiNot recordedSOT-3636 pinsonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- SOT-363
- Pins
- 6
- Details
- equivalent 2x BC547B
- Source
- Published code list
Is it dead? The meter test is below: This part.
BC847BLPSOT-883NPN transistor, 3 pins, Diodes IncorporatedNPN transistorSOT-8833 pinsDiodes Incorporated
- What it is
- NPN transistor
- Maker
- Diodes Incorporated
- Package
- SOT-883
- Pins
- 3
- Details
- NPN transistor: GP, 50V, 100mA, 250mW, B=200..450, >100MHz
- Source
- Published code list
Is it dead? The meter test is below: NPN transistor.
BC847BWT1SOT-3233 pins, onsemiNot recordedSOT-3233 pinsonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- SOT-323
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: This part.
6 more parts have no package on record
2SC5838RF transistor, PanasonicRF transistorNot recordedNot recordedPanasonic
- What it is
- RF transistor
- Maker
- Panasonic
- Package
- Not recorded
- Pins
- Not recorded
- Details
- NPN transistor: RF, LN, 15V, 80mA, 100mW, B=110..250, 6GHz
- Source
- Published code list
Is it dead? The meter test is below: Bipolar transistor.
BC847BFNexperiaNot recordedNot recordedNot recordedNexperia
- What it is
- Not recorded
- Maker
- Nexperia
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Si-npn: GP, 50V, 100mA, 200mW, B=200..450, 250MHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
BC847BL3NPN transistor, InfineonNPN transistorNot recordedNot recordedInfineon
- What it is
- NPN transistor
- Maker
- Infineon
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Published code list
Is it dead? The meter test is below: NPN transistor.
BD46E482G-MVoltage supervisor, ROHMVoltage supervisorNot recordedNot recordedROHM
- What it is
- Voltage supervisor
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 4.8V±1%, -MR, -Reset PPO, Rdt=200ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
BU4346FVoltage supervisor, ROHMVoltage supervisorNot recordedNot recordedROHM
- What it is
- Voltage supervisor
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS-IC: Voltage Detector 4,6V, Reset Push-pull output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
BU4346FWEVoltage supervisor, ROHMVoltage supervisorNot recordedNot recordedROHM
- What it is
- Voltage supervisor
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS-IC: Voltage Detector 4,6V, Reset Push-pull output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
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.
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.
NPN transistor
Diode range, part lifted or its base leg off the pad.
Working, it reads
Red 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.
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.
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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