SMD code E22
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.
24 parts are printed E22
Not sure which one you have?
Answer up to 4 quick questions and these 24 parts are ranked, with a meter test that settles it. It works on a dead part too.
DTA143ZMSOT-723Digital transistor (PNP, resistors built in), 3 pins, Galaxy MicroelectronicsDigital transistor (PNP, resistors built in)SOT-7233 pinsGalaxy Microelectronics
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- Galaxy Microelectronics
- Package
- SOT-723
- Pins
- 3
- Details
- 50V, 100mA, PNP Bipolar Digital Transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
EGFM202SMARectifier, 2 pins, Formosa MicrosemiRectifierSMA2 pinsFormosa Microsemi
- What it is
- Rectifier
- Maker
- Formosa Microsemi
- Package
- SMA
- Pins
- 2
- Details
- Rectifier diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
SMF220ASOD-123FTVS diode, 2 pins, Blue RocketTVS diodeSOD-123F2 pinsBlue Rocket
- What it is
- TVS diode
- Maker
- Blue Rocket
- Package
- SOD-123F
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
TDTA143ZMSOT-723Digital transistor (PNP, resistors built in), 3 pins, Galaxy MicroelectronicsDigital transistor (PNP, resistors built in)SOT-7233 pinsGalaxy Microelectronics
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- Galaxy Microelectronics
- Package
- SOT-723
- Pins
- 3
- Details
- 50V, 100mA, PNP Bipolar Digital Transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
TP2271-TRSOT-23-5Operational amplifier, 5 pins, 3PEAKOperational amplifierSOT-23-55 pins3PEAK
- What it is
- Operational amplifier
- Maker
- 3PEAK
- Package
- SOT-23-5
- Pins
- 5
- Details
- 36-V, 7-MHz GBWP, RRO Operational Amplifiers
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
TPSMEJ22ASMCTVS diode, 2 pins, SOCAYTVS diodeSMC2 pinsSOCAY
- What it is
- TVS diode
- Maker
- SOCAY
- Package
- SMC
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
2SK932-22SOT-233 pins, Sanyo ElectricNot recordedSOT-233 pinsSanyo Electric
- What it is
- Not recorded
- Maker
- Sanyo Electric
- Package
- SOT-23
- Pins
- 3
- Details
- n-FET: RF, LN, 15V, 50mA, 200mW, Idss=7,3..12mA, Up<1,4V
- Source
- Published code list
Is it dead? The meter test is below: MOSFET.
IXD5121A433MR-GSOT-23-5Voltage supervisor, 5 pins, IXYSVoltage supervisorSOT-23-55 pinsIXYS
- What it is
- Voltage supervisor
- Maker
- IXYS
- Package
- SOT-23-5
- Pins
- 5
- Details
- Voltage detector IC: 3.3V±2%, -Reset ODO, +WDEN, Wt=200ms, Rdt=3.13ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
KIC77E22TSOT-23Voltage supervisor, 3 pins, KECVoltage supervisorSOT-233 pinsKEC
- What it is
- Voltage supervisor
- Maker
- KEC
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 2.2V±1%, -Reset ODO, Rdt=400ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
LD6911GDAW-22WSONLDO regulator, LeadtrendLDO regulatorWSONNot recordedLeadtrend
- What it is
- LDO regulator
- Maker
- Leadtrend
- Package
- WSON
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, LN, Ultra-fast, 2.2V±2%, 300mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
5 more parts have no package on record
EGFM202-BSRectifier, Formosa MicrosemiRectifierNot recordedNot recordedFormosa Microsemi
- What it is
- Rectifier
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Rectifier diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
EGFM202-SFRectifier, Formosa MicrosemiRectifierNot recordedNot recordedFormosa Microsemi
- What it is
- Rectifier
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Rectifier diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
EGFM202-SF-Q1Rectifier, Formosa MicrosemiRectifierNot recordedNot recordedFormosa Microsemi
- What it is
- Rectifier
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Rectifier diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
LN2622ELT1GN-channel MOSFET, LRCN-channel MOSFETNot recordedNot recordedLRC
- What it is
- N-channel MOSFET
- Maker
- LRC
- Package
- Not recorded
- Pins
- Not recorded
- Details
- MOSFET, N-Channel, VDSS 100 V, VGS 20 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: N-channel MOSFET.
KIC77E22MVoltage supervisor, KECVoltage supervisorNot recordedNot recordedKEC
- What it is
- Voltage supervisor
- Maker
- KEC
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 2.2V±1%, -Reset ODO, Rdt=400ms
- 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.
Digital transistor
Ohms range, part lifted. The datasheet gives the built-in resistors: R1 in series with the base, R2 from base to emitter.
Working, it reads
Base to emitter reads about R1 plus R2 either way round, about 20 kΩ on a 10 k and 10 k part, give or take their wide tolerance. Collector to emitter reads open. A part with no R2 reads a junction behind R1 one way instead.
Dead, it reads
- Collector to emitter the same both ways, near 0 Ω with a continuous beep: shorted.
- From the base, open or far above R1 plus R2: R1 has failed. Static damage shows here most often.
- Base to emitter near 0 Ω: failed short.
- 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:
- The readings depend on the resistor values, so an identical part elsewhere on the board is the surest reference. Measure it the same way.
- Watch for:
- On the diode range a good part with 10 kΩ resistors reads open on every pair, so a good part looks dead there. Use the ohms range.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Silicon diode
Diode range, part lifted or one leg off the pad. Red probe on the anode.
Working, it reads
About 0.5 to 0.8 V anode to cathode, and open the other way. Small switching diodes read about 0.6 to 0.7 V; large rectifiers can read a little lower.
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: failed open.
- A reading the wrong way round as well: 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 three-pin body can hold two diodes. With a common pin they read two junctions from that pin, just like a transistor; in series they read two drops end to end. Test each pair the datasheet names.
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.
TVS or ESD protection diode
Diode range, from the protected line to ground, part lifted if you can.
Working, it reads
A one-way part reads about 0.6 to 0.8 V forward and open in reverse. A two-way part reads open both ways. Arrays with several lines read as the datasheet's diagram draws them.
Dead, it reads
- From the line to ground, the same reading both ways, near 0 V with a continuous beep: shorted.
- A reading both ways on a one-way part: leaky.
- A one-way part open both ways: failed open.
- On the board
- , a line reading shorted to ground can be this part or anything else on that line. Lift it: if the short goes with it, it has failed.
- Compare:
- The same part on the next line or connector pin is the healthy reading to compare with.
- Watch for:
- A two-way part reads open both ways when it is good, exactly like one that has failed open. The meter cannot tell them apart; an identical part on the next line can.
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.
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.
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.
Printed with a code easy to misread as E22
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 E22
For a marking with its end worn or burnt off. Each code has a page of its own.
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