SMD code -7L
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.
41 parts are printed -7L
Not sure which one you have?
Answer up to 4 quick questions and these 41 parts are ranked, with a meter test that settles it. It works on a dead part too.
BAS16-02GPSOT-23Switching diode, 3 pins, ChenmkoSwitching diodeSOT-233 pinsChenmko
- What it is
- Switching diode
- Maker
- Chenmko
- Package
- SOT-23
- Pins
- 3
- Details
- SWITCHING DIODE, 100 V, 0.15 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
FMUN5234DWSOT-363Digital transistor (resistors built in), 6 pins, Formosa MicrosemiDigital transistor (resistors built in)SOT-3636 pinsFormosa Microsemi
- What it is
- Digital transistor (resistors built in)
- Maker
- Formosa Microsemi
- Package
- SOT-363
- Pins
- 6
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
FMUN5234DW-Q1SOT-363Digital transistor (resistors built in), 6 pins, Formosa MicrosemiDigital transistor (resistors built in)SOT-3636 pinsFormosa Microsemi
- What it is
- Digital transistor (resistors built in)
- Maker
- Formosa Microsemi
- Package
- SOT-363
- Pins
- 6
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
HBC124XS6RSOT-363Digital transistor (NPN, resistors built in), 6 pins, CYStekDigital transistor (NPN, resistors built in)SOT-3636 pinsCYStek
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- CYStek
- Package
- SOT-363
- Pins
- 6
- Details
- dual NPN digital (resistor-equipped) transistor, R1 22K, R2 47K
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
LMUN5234DW1T1GSOT-363Digital transistor (resistors built in), 6 pins, LRCDigital transistor (resistors built in)SOT-3636 pinsLRC
- What it is
- Digital transistor (resistors built in)
- Maker
- LRC
- Package
- SOT-363
- Pins
- 6
- Details
- Digital transistor (bias resistors built in), N+N, IC 100 mA, VCEO 50 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
MMUN5234DWSOT-363Digital transistor (resistors built in), 6 pins, YFWDigital transistor (resistors built in)SOT-3636 pinsYFW
- What it is
- Digital transistor (resistors built in)
- Maker
- YFW
- Package
- SOT-363
- Pins
- 6
- Details
- Digital transistor (bias resistors built in)
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
MUN5234DW1SOT-363Digital transistor (NPN, resistors built in), 6 pins, onsemiDigital transistor (NPN, resistors built in)SOT-3636 pinsonsemi
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- onsemi
- Package
- SOT-363
- Pins
- 6
- Details
- Dual NPN Bias Resistor Transistors R1 = 22 k , R2 = 47 k
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
NCP4589DMX18DFNLDO regulator, onsemiLDO regulatorDFNNot recordedonsemi
- What it is
- LDO regulator
- Maker
- onsemi
- Package
- DFN
- Pins
- Not recorded
- Details
- 300 mA, Tri-Mode, LDO Linear Voltage Regulator
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Voltage regulator.
NSBC124XDXV6SOT-563Digital transistor (NPN, resistors built in), 6 pins, onsemiDigital transistor (NPN, resistors built in)SOT-5636 pinsonsemi
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- onsemi
- Package
- SOT-563
- Pins
- 6
- Details
- Dual NPN Bias Resistor Transistors R1 = 22 k , R2 = 47 k
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
NSVBC124XDXV6SOT-563Digital transistor (NPN, resistors built in), 6 pins, onsemiDigital transistor (NPN, resistors built in)SOT-5636 pinsonsemi
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- onsemi
- Package
- SOT-563
- Pins
- 6
- Details
- Dual NPN Bias Resistor Transistors R1 = 22 k , R2 = 47 k
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
PESD24VF1BLSOD-882ESD protection diode, 2 pins, NexperiaESD protection diodeSOD-8822 pinsNexperia
- What it is
- ESD protection diode
- Maker
- Nexperia
- Package
- SOD-882
- Pins
- 2
- Details
- Ultra low capacitance bidirectional ESD protection diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
S-LMUN5234DW1T1GSOT-363Digital transistor (resistors built in), 6 pins, LRCDigital transistor (resistors built in)SOT-3636 pinsLRC
- What it is
- Digital transistor (resistors built in)
- Maker
- LRC
- Package
- SOT-363
- Pins
- 6
- Details
- Digital transistor (bias resistors built in), N+N, IC 100 mA, VCEO 50 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
SMUN5234DWSOT-363Digital transistor (resistors built in), 6 pins, SeCoSDigital transistor (resistors built in)SOT-3636 pinsSeCoS
- What it is
- Digital transistor (resistors built in)
- Maker
- SeCoS
- Package
- SOT-363
- Pins
- 6
- Details
- Digital (resistor-equipped) transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
2 more parts have no package on record
NCP136AFCT110LDO regulator, onsemiLDO regulatorNot recordedNot recordedonsemi
- What it is
- LDO regulator
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- LDO Regulator - Very Low Dropout, CMOS, Bias Rail
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Voltage regulator.
TCK207GLoad switch, ToshibaLoad switchNot recordedNot recordedToshiba
- What it is
- Load switch
- Maker
- Toshiba
- Package
- Not recorded
- Pins
- Not recorded
- Details
- 0.75 V, 2A Load Switch IC with Reverse Current Blocking in Ultra Small Package
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Load switch.
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.
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.
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.
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.
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.
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.
Load switch
Voltage, board powered, black probe on ground.
Working, it reads
Switched on, the output pin sits at the input voltage. Switched off, it sits near 0 V.
Dead, it reads
- Output at the input voltage while switched off: the pass element has shorted.
- Input present and switched on, no output: failed open, or shut down into a shorted load. Power off and measure output to ground.
- On the board:
- An output near 0 Ω to ground is usually the load. Lift the output pin to see which.
- 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 pinout and whether the enable is active high or low differ between parts. The datasheet gives both.
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 -7L
One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.
Codes not listed here are printed on 24 more parts.
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