SMD code EN in SOT-343
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.
1 part in SOT-343 is printed EN
Not sure which one you have?
Answer up to 4 quick questions and these 31 parts are ranked, with a meter test that settles it. It works on a dead part too.
R3112Q421CSOT-343RicohNot recordedRicoh
- What it is
- Not recorded
- Maker
- Ricoh
- Package
- SOT-343
- Pins
- 4
- Details
- CMOS-IC: Voltage Detector 4,2V, Reset Open drain output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
14 more parts have no package on record. Nothing rules them out, so they stay.
FDZ1416NZN-channel MOSFET, onsemiN-channel MOSFETonsemi
- What it is
- N-channel MOSFET
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Common Drain N-Channel 2.5 V PowerTrench WL-CSP MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: N-channel MOSFET.
FSA2276UMAnalog switch, onsemiAnalog switchonsemi
- What it is
- Analog switch
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- DPDT (0.5 ) HiFi Audio Switch w/ Negative Swing
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
NCP161BMX180LDO regulator, onsemiLDO regulatoronsemi
- What it is
- LDO regulator
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- LDO Regulator for RF and Analog Circuits - Ultra-Low Noise and High PSRR
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Voltage regulator.
NCV8161BMX180LDO regulator, onsemiLDO regulatoronsemi
- What it is
- LDO regulator
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- LDO Regulator - Ultra-Low Noise, High PSRR, RF and Analog Circuits
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Voltage regulator.
AP1704ETWAnachipNot recordedAnachip
- What it is
- Not recorded
- Maker
- Anachip
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS-IC: Voltage Detector, 2,93V, Reset Push-pull output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
BD49E51GVoltage supervisor, ROHMVoltage supervisorROHM
- What it is
- Voltage supervisor
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage Detector
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
BD49K51GVoltage supervisor, ROHMVoltage supervisorROHM
- What it is
- Voltage supervisor
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage Detector
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
BD4852FVEVoltage supervisor, ROHMVoltage supervisorROHM
- What it is
- Voltage supervisor
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS-IC: Voltage Detector 5,2V, Reset Open drain output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
BD4852GVoltage supervisor, ROHMVoltage supervisorROHM
- What it is
- Voltage supervisor
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS-IC: Voltage Detector 5,2V, Reset Open drain output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
BU46K274GVoltage supervisor, ROHMVoltage supervisorROHM
- What it is
- Voltage supervisor
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 2.7V±1%, -Reset PPO, Rdt=400ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
IXD5109C40ANVoltage supervisor, IXYSVoltage supervisorIXYS
- What it is
- Voltage supervisor
- Maker
- IXYS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 4.0V±2%, +Reset PPO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
IXD5127C35KNRVoltage supervisor, IXYSVoltage supervisorIXYS
- What it is
- Voltage supervisor
- Maker
- IXYS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 3.5V±0.8%, +Reset PPO, -MR, 800ms Rt delay
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
IXD5127N36ENRVoltage supervisor, IXYSVoltage supervisorIXYS
- What it is
- Voltage supervisor
- Maker
- IXYS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 3.6V±0.8%, -Reset ODO, -MR, 800ms Rt delay
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
RP300K23AB2Voltage supervisor, RicohVoltage supervisorRicoh
- What it is
- Voltage supervisor
- Maker
- Ricoh
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 2.32V±1%, -Reset ODO, -MR, Rdt=50ms
- 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.
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.
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.
Codes that begin with EN
For a marking with its end worn or burnt off. Each code has a page of its own.
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