SMD code F14 in SOT-23
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.
11 parts in SOT-23 are printed F14
Not sure which one you have?
Answer up to 4 quick questions and these 16 parts are ranked, with a meter test that settles it. It works on a dead part too.
DTB114ECSOT-23Digital transistor (PNP, resistors built in), ROHMDigital transistor (PNP, resistors built in)ROHM
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- ROHM
- Package
- SOT-23
- Pins
- 3
- Details
- PNP -500mA -50V Digital Transistor (Bias Resistor Built-in Transistor)
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
DTB114ECASOT-23Digital transistor (PNP, resistors built in), Galaxy MicroelectronicsDigital transistor (PNP, resistors built in)Galaxy Microelectronics
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- Galaxy Microelectronics
- Package
- SOT-23
- Pins
- 3
- Details
- -50V, -500mA, PNP Bipolar Digital Transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
DTB114EKSOT-23Digital transistor (PNP, resistors built in), ROHMDigital transistor (PNP, resistors built in)ROHM
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- ROHM
- Package
- SOT-23
- Pins
- 3
- Details
- PNP -500mA -50V Digital Transistor (Bias Resistor Built-in Transistor)
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
LDTB114ELT1GSOT-23Digital transistor (PNP, resistors built in), LRCDigital transistor (PNP, resistors built in)LRC
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- LRC
- Package
- SOT-23
- Pins
- 3
- Details
- Digital transistor (bias resistors built in), PNP, IC 500 mA, VCEO 50 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
S-LDTB114ELT1GSOT-23Digital transistor (PNP, resistors built in), LRCDigital transistor (PNP, resistors built in)LRC
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- LRC
- Package
- SOT-23
- Pins
- 3
- Details
- Digital transistor (bias resistors built in), PNP, IC 500 mA, VCEO 50 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
TDTB114ECASOT-23Digital transistor (PNP, resistors built in), Galaxy MicroelectronicsDigital transistor (PNP, resistors built in)Galaxy Microelectronics
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- Galaxy Microelectronics
- Package
- SOT-23
- Pins
- 3
- Details
- -50V, -500mA, PNP Bipolar Digital Transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
DTB114EN3SOT-23Digital transistor (PNP, resistors built in), CYStekDigital transistor (PNP, resistors built in)CYStek
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- CYStek
- Package
- SOT-23
- Pins
- 3
- Details
- PNP digital (resistor-equipped) transistor, R1 10K, R2 10K
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
2SC2223-14SOT-23NEC ElectronicsNot recordedNEC Electronics
- What it is
- Not recorded
- Maker
- NEC Electronics
- Package
- SOT-23
- Pins
- 3
- Details
- Si-npn: HF, 30V, 20mA, 150mW, 600MHz, B=90..180
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SC2223F14SOT-23RenesasNot recordedRenesas
- What it is
- Not recorded
- Maker
- Renesas
- Package
- SOT-23
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SC2412SOT-23NPN transistor, WEJ ElectronicNPN transistorWEJ Electronic
- What it is
- NPN transistor
- Maker
- WEJ Electronic
- Package
- SOT-23
- Pins
- 3
- Details
- Bipolar transistor, 50 V, 0.15 A
- Source
- Published code list
Is it dead? The meter test is below: NPN transistor.
BFR31RSOT-23Thomson CSFNot recordedThomson CSF
- What it is
- Not recorded
- Maker
- Thomson CSF
- Package
- SOT-23
- Pins
- 3
- Details
- FET n-type: GP, 25V, 5mA, 225mW, Up<5V
- Source
- Published code list
Is it dead? The meter test is below: MOSFET.
4 more parts have no package on record. Nothing rules them out, so they stay.
FFM104-LRectifier, Formosa MicrosemiRectifierFormosa Microsemi
- What it is
- Rectifier
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Rectifier diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
FFM104-SFRectifier, Formosa MicrosemiRectifierFormosa Microsemi
- What it is
- Rectifier
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Rectifier diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
FFM104-SF-Q1Rectifier, Formosa MicrosemiRectifierFormosa Microsemi
- What it is
- Rectifier
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Rectifier diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
2SC2223NPN transistorNPN transistorNot recorded
- What it is
- NPN transistor
- Maker
- Not recorded
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Published code list
Is it dead? The meter test is below: NPN transistor.
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.
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.
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.
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.
MOSFET
Diode range, part lifted. Test drain to source first, then short gate to source and test again.
Working, it reads
One way between drain and source reads about 0.4 to 0.9 V, the body diode, and the other way open. The gate reads open to both other pins.
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.
- No body diode at all: failed open.
- On the board
- the gate usually has a resistor to the source, which reads as that resistor and is not a fault. 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.
Silicon diode
Diode range, part lifted or one leg off the pad. Red probe on the anode.
Working, it reads
About 0.5 to 0.8 V anode to cathode, and open the other way. Small switching diodes read about 0.6 to 0.7 V; large rectifiers can read a little lower.
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.
- A reading the wrong way round as well: 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 three-pin body can hold two diodes. With a common pin they read two junctions from that pin, just like a transistor; in series they read two drops end to end. Test each pair the datasheet names.
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 F14
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 F14
For a marking with its end worn or burnt off. Each code has a page of its own.
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