SMD code P23
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.
P23 on a chip capacitor
0.23 pF
0.23 pF capacitor
The p is both the decimal point and the unit: 0.23 pF.
Check it with a meter
Lift one end and measure it on a capacitance range. A good one reads close to 0.23 pF. In circuit the meter also sees everything connected across it, so the reading means little until it is out. A failed one usually reads near 0 Ω, or a steady low resistance, on the ohms range, often from a crack. On the board a shorted capacitor shorts its whole rail. A failed reading does not change what to fit: the marking still says 0.23 pF.
On a transistor or diode body (USP-6B, SOT-23-5, SOT-89-5), P23 is a part code instead. Those parts are listed below.
30 parts are printed P23
Not sure which one you have?
Answer up to 4 quick questions and these 30 parts are ranked, with a meter test that settles it. It works on a dead part too.
PPM3GN20V3DFNP-channel MOSFET, PrisemiP-channel MOSFETDFNNot recordedPrisemi
- What it is
- P-channel MOSFET
- Maker
- Prisemi
- Package
- DFN
- Pins
- Not recorded
- Details
- MOSFET, P-channel, 20 V, 4 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: P-channel MOSFET.
PPMUT20V3SOT-323P-channel MOSFET, 3 pins, PrisemiP-channel MOSFETSOT-3233 pinsPrisemi
- What it is
- P-channel MOSFET
- Maker
- Prisemi
- Package
- SOT-323
- Pins
- 3
- Details
- P-channel MOSFET, 20 V, 1.8 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: P-channel MOSFET.
DDTA115TCASOT-23Digital transistor (PNP, resistors built in), 3 pins, Diodes IncorporatedDigital transistor (PNP, resistors built in)SOT-233 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 R1 100k 0.2W
- Source
- Published code list
Is it dead? The meter test is below: Digital transistor.
DDTA115TESOT-523Digital transistor (PNP, resistors built in), 3 pins, Diodes IncorporatedDigital transistor (PNP, resistors built in)SOT-5233 pinsDiodes Incorporated
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- Diodes Incorporated
- Package
- SOT-523
- Pins
- 3
- Details
- dtr pnp 50V 0.1A R1 100k 0.15W
- Source
- Published code list
Is it dead? The meter test is below: Digital transistor.
DDTA115TKASOT-23Digital transistor (PNP, resistors built in), 3 pins, Diodes IncorporatedDigital transistor (PNP, resistors built in)SOT-233 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 R1 100k 0.2W
- Source
- Published code list
Is it dead? The meter test is below: Digital transistor.
DDTA115TUASOT-323Digital transistor (PNP, resistors built in), 3 pins, Diodes IncorporatedDigital transistor (PNP, resistors built in)SOT-3233 pinsDiodes Incorporated
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- Diodes Incorporated
- Package
- SOT-323
- Pins
- 3
- Details
- dtr pnp 50V 0.1A R1 100k 0.2W
- Source
- Published code list
Is it dead? The meter test is below: Digital transistor.
DTD743ZESOT-416Digital transistor (NPN, resistors built in), 3 pins, ROHMDigital transistor (NPN, resistors built in)SOT-4163 pinsROHM
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- ROHM
- Package
- SOT-416
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: Digital transistor.
DTD743ZMSOT-523Digital transistor (NPN, resistors built in), 3 pins, ROHMDigital transistor (NPN, resistors built in)SOT-5233 pinsROHM
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- ROHM
- Package
- SOT-523
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: Digital transistor.
HE61CN4202MRSOT-23Voltage supervisor, 3 pins, Heermicr SemicconductorVoltage supervisorSOT-233 pinsHeermicr Semicconductor
- What it is
- Voltage supervisor
- Maker
- Heermicr Semicconductor
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 4.2V±2%, +Reset ODO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
HE7042MNM5RSOT-23-5Voltage supervisor, 5 pins, Heermicr SemicconductorVoltage supervisorSOT-23-55 pinsHeermicr Semicconductor
- What it is
- Voltage supervisor
- Maker
- Heermicr Semicconductor
- Package
- SOT-23-5
- Pins
- 5
- Details
- Voltage detector IC: 4.2V±2%, +Reset ODO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
HE7042MNNRSOT-23Voltage supervisor, 3 pins, Heermicr SemicconductorVoltage supervisorSOT-233 pinsHeermicr Semicconductor
- What it is
- Voltage supervisor
- Maker
- Heermicr Semicconductor
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 4.2V±2%, +Reset ODO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
HE7042MNPRSOT-89Voltage supervisor, 3 pins, Heermicr SemicconductorVoltage supervisorSOT-893 pinsHeermicr Semicconductor
- What it is
- Voltage supervisor
- Maker
- Heermicr Semicconductor
- Package
- SOT-89
- Pins
- 3
- Details
- Voltage detector IC: 4.2V±2%, +Reset ODO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
KIC77A23T2SOT-23Voltage supervisor, 3 pins, KECVoltage supervisorSOT-233 pinsKEC
- What it is
- Voltage supervisor
- Maker
- KEC
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 2.3V±1%, -Reset ODO, Rdt=240ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
2 more parts have no package on record
KIC77A23M2Voltage supervisor, KECVoltage supervisorNot recordedNot recordedKEC
- What it is
- Voltage supervisor
- Maker
- KEC
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 2.3V±1%, -Reset ODO, Rdt=240ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
LDTA144TET1GDigital transistor (PNP, resistors built in), LRCDigital transistor (PNP, resistors built in)Not recordedNot 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=100..600, R1=47k
- 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.
P-channel MOSFET
Diode range, part lifted. Test drain to source first, then short gate to source and test again.
Working, it reads
Red probe on the drain, black on the source: about 0.4 to 0.9 V, the body diode. Open the other way. The gate reads open to both other pins, both ways.
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. Often all three pins end up shorted together.
- No body diode at all: failed open.
- On the board
- the gate usually has a resistor to the source, so gate to source reads that resistor, which 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.
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.
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.
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 P23
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 P23
For a marking with its end worn or burnt off. Each code has a page of its own.
Codes not listed here are printed on 44 more parts.
Did you find your part?
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