SMD code 2F-
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.
118 parts are printed 2F-
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.
850BSOT-23Transistor, 3 pins, YFWTransistorSOT-233 pinsYFW
- What it is
- Transistor
- Maker
- YFW
- Package
- SOT-23
- Pins
- 3
- Details
- Bipolar transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
850BTSOT-523Transistor, 3 pins, YFWTransistorSOT-5233 pinsYFW
- What it is
- Transistor
- Maker
- YFW
- Package
- SOT-523
- Pins
- 3
- Details
- Bipolar transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
AMMBT2907A-HFSOT-23PNP transistor, 3 pins, ComchipPNP transistorSOT-233 pinsComchip
- What it is
- PNP transistor
- Maker
- Comchip
- Package
- SOT-23
- Pins
- 3
- Details
- -60 V, -0.6 A PNP transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
AMMBT2907AM-HFSOT-723PNP transistor, 3 pins, ComchipPNP transistorSOT-7233 pinsComchip
- What it is
- PNP transistor
- Maker
- Comchip
- Package
- SOT-723
- Pins
- 3
- Details
- -60 V, 0.6 A PNP transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
APZT2907A-HFSOT-223PNP transistor, 4 pins, ComchipPNP transistorSOT-2234 pinsComchip
- What it is
- PNP transistor
- Maker
- Comchip
- Package
- SOT-223
- Pins
- 4
- Details
- -60 V, -0.6 A PNP transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
BC850SOT-23Transistor, 3 pins, KECTransistorSOT-233 pinsKEC
- What it is
- Transistor
- Maker
- KEC
- Package
- SOT-23
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
BC850BSOT-23Transistor, 3 pins, InfineonTransistorSOT-233 pinsInfineon
- What it is
- Transistor
- Maker
- Infineon
- Package
- SOT-23
- Pins
- 3
- Details
- SMD General Purpose NPN Transistors
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
BC850BLSOT-23NPN transistor, 3 pins, onsemiNPN transistorSOT-233 pinsonsemi
- What it is
- NPN transistor
- Maker
- onsemi
- Package
- SOT-23
- Pins
- 3
- Details
- General Purpose Transistors Series
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: NPN transistor.
BC850BWSOT-323Transistor, 3 pins, YFWTransistorSOT-3233 pinsYFW
- What it is
- Transistor
- Maker
- YFW
- Package
- SOT-323
- Pins
- 3
- Details
- Bipolar transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
BZD27B30PSOD-123FZener diode, 2 pins, VishayZener diodeSOD-123F2 pinsVishay
- What it is
- Zener diode
- Maker
- Vishay
- Package
- SOD-123F
- Pins
- 2
- Details
- 30 V Zener diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
FMBT2907ASOT-23PNP transistor, 3 pins, Formosa MicrosemiPNP transistorSOT-233 pinsFormosa Microsemi
- What it is
- PNP transistor
- Maker
- Formosa Microsemi
- Package
- SOT-23
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
FMBT2907ATESOT-523PNP transistor, 3 pins, Formosa MicrosemiPNP transistorSOT-5233 pinsFormosa Microsemi
- What it is
- PNP transistor
- Maker
- Formosa Microsemi
- Package
- SOT-523
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
FMBT2907AWSOT-323NPN transistor, 3 pins, Formosa MicrosemiNPN transistorSOT-3233 pinsFormosa Microsemi
- What it is
- NPN transistor
- Maker
- Formosa Microsemi
- Package
- SOT-323
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: NPN transistor.
G2262-33TR1USOT-563DC-DC converter, 6 pins, Global Mixed-mode TechnologyDC-DC converterSOT-5636 pinsGlobal Mixed-mode Technology
- What it is
- DC-DC converter
- Maker
- Global Mixed-mode Technology
- Package
- SOT-563
- Pins
- 6
- Details
- 2A, 1.6MHz, COT Synchronous Step-Down Converter
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
1 more part has no package on record
G2262-33AU1UDC-DC converter, 6 pins, Global Mixed-mode TechnologyDC-DC converterNot recorded6 pinsGlobal Mixed-mode Technology
- What it is
- DC-DC converter
- Maker
- Global Mixed-mode Technology
- Package
- Not recorded
- Pins
- 6
- Details
- 2A, 1.6MHz, COT Synchronous Step-Down Converter
- Source
- Manufacturer datasheet
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.
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.
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.
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.
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.
Printed with a code easy to misread as 2F-
One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.
Codes not listed here are printed on 1 more part.
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