SMD code N111
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.
N111 on a chip capacitor
111 pF
111 pF capacitor
The n is both the decimal point and the unit: 111 pF.
Check it with a meter
Lift one end and measure it on a capacitance range. A good one reads close to 111 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 111 pF.
On a transistor or diode body (SOT-89, SOT-23, SOT-23-5), N111 is a part code instead. Those parts are listed below.
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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.
The only part printed N111 in our tables
R1515H111B
- What it is
- Not recorded
- Maker
- Ricoh
- Package
- SOT-89-5
- Pins
- 5
- Details
- Linear voltage regulator IC: 11.1V±2%, 50mA, +CE
- Source
- Published code list
Is it dead?
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.
Was it this one?
Printed with a code easy to misread as N111
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 N111
For a marking with its end worn or burnt off. Each code has a page of its own.
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