SMD code P41 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.
6 parts in SOT-23 are printed P41
Not sure which one you have?
Answer up to 4 quick questions and these 12 parts are ranked, with a meter test that settles it. It works on a dead part too.
HE61CN4401MRSOT-23Voltage supervisor, 3 pins, Heermicr SemicconductorVoltage supervisor3 pinsHeermicr Semicconductor
- What it is
- Voltage supervisor
- Maker
- Heermicr Semicconductor
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 4.4V±1%, +Reset ODO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
HE7044MNNR1SOT-23Voltage supervisor, 3 pins, Heermicr SemicconductorVoltage supervisor3 pinsHeermicr Semicconductor
- What it is
- Voltage supervisor
- Maker
- Heermicr Semicconductor
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 4.4V±1%, +Reset ODO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
KIC77A41T2SOT-23Voltage supervisor, 3 pins, KECVoltage supervisor3 pinsKEC
- What it is
- Voltage supervisor
- Maker
- KEC
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 4.1V±1%, -Reset ODO, Rdt=240ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
PDTC144TTSOT-233 pins, NXPNot recorded3 pinsNXP
- What it is
- Not recorded
- Maker
- NXP
- Package
- SOT-23
- Pins
- 3
- Details
- equivalent PDTC144TS
- Source
- Published code list
Is it dead? The meter test is below: This part.
SST4341SOT-233 pins, Linear Integrated SystemNot recorded3 pinsLinear Integrated System
- What it is
- Not recorded
- Maker
- Linear Integrated System
- Package
- SOT-23
- Pins
- 3
- Details
- n-FET: GP, Low-Noise, 50V, Idss=3mA, Up<6V
- Source
- Published code list
Is it dead? The meter test is below: MOSFET.
ZXTP2041FSOT-233 pins, Diodes IncorporatedNot recorded3 pinsDiodes Incorporated
- What it is
- Not recorded
- Maker
- Diodes Incorporated
- Package
- SOT-23
- Pins
- 3
- Details
- pnp 40V 1A 1.2W comp ZXTN2040F
- Source
- Published code list
Is it dead? The meter test is below: This part.
6 more parts have no package on record. Nothing rules them out, so they stay.
LP4101LT1GP-channel MOSFET, LRCP-channel MOSFETNot recordedLRC
- What it is
- P-channel MOSFET
- Maker
- LRC
- Package
- Not recorded
- Pins
- Not recorded
- Details
- MOSFET, P-Channel, VDSS 20 V, VGS 8 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: P-channel MOSFET.
74AUP2G241DCNXPNot recordedNot recordedNXP
- What it is
- Not recorded
- Maker
- NXP
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS logic IC: Dual non-inverted bus buffer with 3-state output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
74AUP2G241GDNXPNot recordedNot recordedNXP
- What it is
- Not recorded
- Maker
- NXP
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS logic IC: Dual non-inverted bus buffer with 3-state output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
74AUP2G241GMNXPNot recordedNot recordedNXP
- What it is
- Not recorded
- Maker
- NXP
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS logic IC: Dual non-inverted bus buffer with 3-state output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
74AUP2G241GTNXPNot recordedNot recordedNXP
- What it is
- Not recorded
- Maker
- NXP
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS logic IC: Dual non-inverted bus buffer with 3-state output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
KIC77A41M2Voltage supervisor, KECVoltage supervisorNot recordedKEC
- What it is
- Voltage supervisor
- Maker
- KEC
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 4.1V±1%, -Reset ODO, Rdt=240ms
- Source
- Published code list
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.
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.
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.
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.
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.
Printed with a code easy to misread as P41
One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.
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