SMD code P10 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.
5 parts in SOT-23 are printed P10
Not sure which one you have?
Answer up to 4 quick questions and these 6 parts are ranked, with a meter test that settles it. It works on a dead part too.
DDTA143FCASOT-23Digital transistor (PNP, resistors built in), 3 pins, Diodes IncorporatedDigital transistor (PNP, resistors built in)3 pinsDiodes Incorporated
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- Diodes Incorporated
- Package
- SOT-23
- Pins
- 3
- Details
- dtr pnp 50V 0.1A 4k7/22k 0.2W
- Source
- Published code list
Is it dead? The meter test is below: Digital transistor.
DDTA143FKASOT-23Digital transistor (PNP, resistors built in), 3 pins, Diodes IncorporatedDigital transistor (PNP, resistors built in)3 pinsDiodes Incorporated
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- Diodes Incorporated
- Package
- SOT-23
- Pins
- 3
- Details
- dtr pnp 50V 0.1A 4k7/22k 0.2W
- Source
- Published code list
Is it dead? The meter test is below: Digital transistor.
LDTA143XLT1GSOT-23Digital transistor (PNP, resistors built in), 3 pins, LRCDigital transistor (PNP, resistors built in)3 pinsLRC
- 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 100 mA, VCEO 50 V
- Source
- An older or alternative marking, from a published code list
Is it dead? The meter test is below: Digital transistor.
PDTD114ETSOT-233 pins, NXPNot recorded3 pinsNXP
- What it is
- Not recorded
- Maker
- NXP
- Package
- SOT-23
- Pins
- 3
- Details
- Si-npn-Digi: Sw, 50V, 500mA, 250mW, R1/R2=10k/10k
- Source
- Published code list
Is it dead? The meter test is below: This part.
PMBFJ110SOT-23JFET, 3 pins, PhiJFET3 pinsPhi
- What it is
- JFET
- Maker
- Phi
- Package
- SOT-23
- Pins
- 3
- Details
- N-channel junction FETs
- Source
- Published code list
Is it dead? The meter test is below: JFET.
1 more part has no package on record. Nothing rules it out, so it stays.
LDTA143XET1GDigital transistor (PNP, resistors built in), LRCDigital transistor (PNP, resistors built in)Not recordedLRC
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- LRC
- Package
- Not recorded
- Pins
- Not recorded
- Details
- PNP transistor: Sw., 50V, 100mA, B>30, R1/R2=4.7k/10k
- Source
- Published code list
Is it dead? The meter test is below: Digital 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.
JFET
Ohms range for drain to source, diode range for the gate, part lifted.
Working, it reads
Drain to source conducts both ways at a few hundred ohms, depending on the part, and some meters beep on it. The gate reads one junction to drain and to source, about 0.6 to 0.7 V, and open the other way.
Dead, it reads
- The gate the same both ways to drain or source, near 0 V with a continuous beep: gate shorted.
- Drain to source open: the channel has 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:
- Drain to source resistance varies from part to part. An identical part elsewhere on the board shows what is normal.
- Watch for:
- A good channel can beep like a short between drain and source. That is normal; the gate junction says whether it has failed.
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 P10
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 P10
For a marking with its end worn or burnt off. Each code has a page of its own.
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