SMD code N4s
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.
The last letter, s, is lower case, which on NXP and Philips parts is a date or factory code, so it was set aside and N4 was searched.
186 parts are printed N4s
Not sure which one you have?
Answer up to 4 quick questions and these 50 parts are ranked, with a meter test that settles it. It works on a dead part too.
BZD27C13PWSOD-123WZener diode, 2 pins, Taiwan SemiconductorZener diodeSOD-123W2 pinsTaiwan Semiconductor
- What it is
- Zener diode
- Maker
- Taiwan Semiconductor
- Package
- SOD-123W
- Pins
- 2
- Details
- Zener diode: 12.4..14.1V, Zzt=5, Izt=50mA, 1W
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
BZX84C27TSOT-523Zener diode, 3 pins, Silicon-Based TechnologyZener diodeSOT-5233 pinsSilicon-Based Technology
- What it is
- Zener diode
- Maker
- Silicon-Based Technology
- Package
- SOT-523
- Pins
- 3
- Details
- Zener diode: 25.1..28.9V, Zzt=80, Izt=5mA, 150mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
CFH400SOT-3434 pins, InfineonNot recordedSOT-3434 pinsInfineon
- What it is
- Not recorded
- Maker
- Infineon
- Package
- SOT-343
- Pins
- 4
- Details
- Pseudomorphic high electron mobility transistor: GaAs, LN, UHF, 6.5V, 80mA, 150mW, 1.8GHz, 15.7dB
- Source
- Published code list
Is it dead? The meter test is below: Bipolar transistor.
CMOZ8L2SOD-523Zener diode, 2 pins, Central SemiconductorZener diodeSOD-5232 pinsCentral Semiconductor
- What it is
- Zener diode
- Maker
- Central Semiconductor
- Package
- SOD-523
- Pins
- 2
- Details
- Z-diode: 7.79..8.61V, Izt=0.25mA, Zzt=200Ω, 250mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
CZRH5264B-GSOD-523Zener diode, 2 pins, ComchipZener diodeSOD-5232 pinsComchip
- What it is
- Zener diode
- Maker
- Comchip
- Package
- SOD-523
- Pins
- 2
- Details
- Zener diode: 57..63V, Zzt=170, Izt=2.1mA, 150mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
CZRV5264B-GSOD-323Zener diode, 2 pins, ComchipZener diodeSOD-3232 pinsComchip
- What it is
- Zener diode
- Maker
- Comchip
- Package
- SOD-323
- Pins
- 2
- Details
- Zener diode: 57..63V, Zzt=170, Izt=2.1mA, 200mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
EC95808N54B1NSOT-23Voltage supervisor, 3 pins, E-CMOSVoltage supervisorSOT-233 pinsE-CMOS
- What it is
- Voltage supervisor
- Maker
- E-CMOS
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 5.4V±2%, -Reset ODO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
EC95808N54C1NSOT-323Voltage supervisor, 3 pins, E-CMOSVoltage supervisorSOT-3233 pinsE-CMOS
- What it is
- Voltage supervisor
- Maker
- E-CMOS
- Package
- SOT-323
- Pins
- 3
- Details
- Voltage detector IC: 5.4V±2%, -Reset ODO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
ELM7644LABSOT-23Voltage supervisor, 3 pins, ELM TechnologyVoltage supervisorSOT-233 pinsELM Technology
- What it is
- Voltage supervisor
- Maker
- ELM Technology
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 4.4V±2%, -Reset PPO, Rdt=250ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
FP6802-37NS3GSOT-23Voltage supervisor, 3 pins, FitipowerVoltage supervisorSOT-233 pinsFitipower
- What it is
- Voltage supervisor
- Maker
- Fitipower
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 3.7V±2%, -Reset ODO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
ILC5061IC34XSOT-3233 pins, IMPNot recordedSOT-3233 pinsIMP
- What it is
- Not recorded
- Maker
- IMP
- Package
- SOT-323
- Pins
- 3
- Details
- CMOS-IC: Voltage Detector 3.4V±2%, -Reset Open-Drain Output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
ILC5061M34XSOT-233 pins, IMPNot recordedSOT-233 pinsIMP
- What it is
- Not recorded
- Maker
- IMP
- Package
- SOT-23
- Pins
- 3
- Details
- CMOS-IC: Voltage Detector 3.4V±2%, -Reset Open-Drain Output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
3 more parts have no package on record
CFH400T4 pins, InfineonNot recordedNot recorded4 pinsInfineon
- What it is
- Not recorded
- Maker
- Infineon
- Package
- Not recorded
- Pins
- 4
- Details
- Pseudomorphic high electron mobility transistor: GaAs, LN, UHF, 6.5V, 80mA, 150mW, 1.8GHz, 15.7dB
- Source
- Published code list
Is it dead? The meter test is below: Bipolar transistor.
EC95808N54C7IVoltage supervisor, E-CMOSVoltage supervisorNot recordedNot recordedE-CMOS
- What it is
- Voltage supervisor
- Maker
- E-CMOS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 5.4V±2%, -Reset ODO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
EC95808N54C7SVoltage supervisor, E-CMOSVoltage supervisorNot recordedNot recordedE-CMOS
- What it is
- Voltage supervisor
- Maker
- E-CMOS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 5.4V±2%, -Reset ODO
- 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.
Zener diode
Diode range for the forward check, part lifted, red probe on the anode. A bench supply for the Zener voltage.
Working, it reads
About 0.6 to 0.8 V forward and open in reverse on the diode range. Its Zener voltage shows only on a supply: feed it through a resistor that sets about 5 mA, cathode to positive, read quickly, and it should hold near its rated voltage.
Dead, it reads
- The same reading both ways round, near 0 V with a continuous beep or the same middling value: shorted.
- Open both ways, forward too: failed open.
- Holds well off its rated voltage on the supply test: drifted.
- A soft knee, or a voltage that creeps on the supply test: leaky.
- 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.
- Watch for:
- A meter's diode range stops at about 2 to 3 V, so almost every Zener reads open in reverse on it, good or bad; a 3 V meter may just show a 2.4 or 2.7 V part. Above about 3 V the meter cannot tell a Zener from a plain diode.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Bipolar transistor
Diode range, part lifted or its base leg off the pad.
Working, it reads
From the base, one probe colour reads about 0.6 to 0.75 V to the emitter and to the collector, and open the other way round. Collector to emitter reads open both ways.
Dead, it reads
- Collector to emitter the same both ways, near 0 V with a continuous beep: shorted. The commonest failure.
- The base the same both ways to another pin, near 0 V or a middling value: a shorted junction.
- Only one junction reads, or none: a junction has failed open. It then looks like a diode.
- A reading the wrong way round, where it should be open: leaky.
- 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.
- Watch for:
- A pair of diodes with a common pin reads just like a transistor, and some transistors carry a built-in diode or resistor. The datasheet says which.
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.
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