SMD code -2L 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.
33 parts in SOT-23 are printed -2L
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.
all SOT-23, 3 pins. What differs:
NSVMMBT5401LSOT-23PNP transistor, onsemiPNP transistoronsemi
- What it is
- PNP transistor
- Maker
- onsemi
- Package
- SOT-23
- Pins
- 3
- Details
- High Voltage Transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
NSVMMBT5401LT3GSOT-23PNP transistor, HXYPNP transistorHXY
- What it is
- PNP transistor
- Maker
- HXY
- Package
- SOT-23
- Pins
- 3
- Details
- Bipolar transistor, 150 V, 0.6 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
PT23T5401SOT-23PrisemiNot recordedPrisemi
- What it is
- Not recorded
- Maker
- Prisemi
- Package
- SOT-23
- Pins
- 3
- Details
- Bipolar transistor, 150 V, 0.6 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
S-LMBT5401LT1GSOT-23PNP transistor, LRCPNP transistorLRC
- What it is
- PNP transistor
- Maker
- LRC
- Package
- SOT-23
- Pins
- 3
- Details
- Bipolar transistor, PNP, IC 500 mA, VCEO 150 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
SMMBT5401LSOT-23PNP transistor, onsemiPNP transistoronsemi
- What it is
- PNP transistor
- Maker
- onsemi
- Package
- SOT-23
- Pins
- 3
- Details
- High Voltage Transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
TMMBT5401SOT-23PNP transistor, Galaxy MicroelectronicsPNP transistorGalaxy Microelectronics
- What it is
- PNP transistor
- Maker
- Galaxy Microelectronics
- Package
- SOT-23
- Pins
- 3
- Details
- 150V, 0.6A, General Purpose PNP Bipolar Transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
WT5401SOT-23WayonNot recordedWayon
- 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.
BTA1514N3SOT-23PNP transistor, CYStekPNP transistorCYStek
- What it is
- PNP transistor
- Maker
- CYStek
- Package
- SOT-23
- Pins
- 3
- Details
- -160 V, -0.6 A PNP transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
BAT754ASOT-23PhilipsNot recordedPhilips
- What it is
- Not recorded
- Maker
- Philips
- Package
- SOT-23
- Pins
- 3
- Details
- 30V 200mA dual schottky ca
- Source
- Published code list
Is it dead? The meter test is below: Schottky diode.
FMMT4403SOT-23Not recordedNot recorded
- What it is
- Not recorded
- Maker
- Not recorded
- Package
- SOT-23
- Pins
- 3
- Details
- 2N4403
- Source
- Published code list
Is it dead? The meter test is below: This part.
FMMT5401SOT-23Diodes IncorporatedNot recordedDiodes Incorporated
- What it is
- Not recorded
- Maker
- Diodes Incorporated
- Package
- SOT-23
- Pins
- 3
- Details
- equivalent 2N5401
- Source
- Published code list
Is it dead? The meter test is below: This part.
KMMBT5401SOT-23PNP transistor, FairchildPNP transistorFairchild
- What it is
- PNP transistor
- Maker
- Fairchild
- Package
- SOT-23
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
KST5401SOT-23FairchildNot recordedFairchild
- What it is
- Not recorded
- Maker
- Fairchild
- Package
- SOT-23
- Pins
- 3
- Details
- Si-pnp: Vid, 160V, 500mA, 350mW, B=60..240, >150MHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
MMBT5401LTSOT-23onsemiNot recordedonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- SOT-23
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: This part.
MMBT5401LT1SOT-23PNP transistor, Fairchild SemiconductorPNP transistorFairchild Semiconductor
- What it is
- PNP transistor
- Maker
- Fairchild Semiconductor
- Package
- SOT-23
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: PNP 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.
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.
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.
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.
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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