SMD code N4L in SOT-89
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.
3 parts in SOT-89 are printed N4L
Not sure which one you have?
Answer up to 4 quick questions and these 5 parts are ranked, with a meter test that settles it. It works on a dead part too.
S-1131B26UASOT-893 pins, ABLICNot recorded3 pinsABLIC
- What it is
- Not recorded
- Maker
- ABLIC
- Package
- SOT-89
- Pins
- 3
- Details
- VR-IC: LDO, 2.6V±1%, 300mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
S-1131B26UA-N4L-TFSOT-89LDO regulator, 3 pins, Seiko InstrumentsLDO regulator3 pinsSeiko Instruments
- What it is
- LDO regulator
- Maker
- Seiko Instruments
- Package
- SOT-89
- Pins
- 3
- Details
- Linear voltage regulator IC: LDO, 2.6V±1%, 300mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
S-1131B26UA-N4LTFSOT-893 pins, ABLICNot recorded3 pinsABLIC
- What it is
- Not recorded
- Maker
- ABLIC
- Package
- SOT-89
- Pins
- 3
- Details
- equivalent [2.6V LDO]
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
2 more parts have no package on record. Nothing rules them out, so they stay.
LN2294LT1GN-channel MOSFET, LRCN-channel MOSFETNot recordedLRC
- What it is
- N-channel MOSFET
- Maker
- LRC
- Package
- Not recorded
- Pins
- Not recorded
- Details
- MOSFET, N-Channel, VDSS 110 V, VGS 20 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: N-channel MOSFET.
S-1131B26PD-N4LTF6 pins, ABLICNot recorded6 pinsABLIC
- What it is
- Not recorded
- Maker
- ABLIC
- Package
- Not recorded
- Pins
- 6
- Details
- equivalent [2.6V LDO]
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
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.
Voltage regulator
Voltage, board powered, black probe on ground. Then ohms with the power off.
Working, it reads
Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.
Dead, it reads
- Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
- Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
- Power off, input to output near 0 Ω: shorted.
- On the board:
- An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
- Compare:
- The same regulator on another rail or another board shows the right voltages and the right resistances.
- Watch for:
- Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
N-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 source, black on the drain: 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. A drain short can be the load. 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 N4L
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 N4L
For a marking with its end worn or burnt off. Each code has a page of its own.
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