SMD code S5s in SOT-323
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 S5 was searched.
2 parts in SOT-323 are printed S5s
Not sure which one you have?
Answer up to 4 quick questions and these 30 parts are ranked, with a meter test that settles it. It works on a dead part too.
15 parts have no package on record. Nothing rules them out, so they stay.
SMDA05NLIESD protection diode, LeiditechESD protection diodeNot recordedLeiditech
- What it is
- ESD protection diode
- Maker
- Leiditech
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SS15BSchottky diode, Taitron ComponentsSchottky diodeNot recordedTaitron Components
- What it is
- Schottky diode
- Maker
- Taitron Components
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Surface Mount Schottky Rectifiers
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
1PS89SS053 pins, NexperiaNot recorded3 pinsNexperia
- What it is
- Not recorded
- Maker
- Nexperia
- Package
- Not recorded
- Pins
- 3
- Details
- Si-diode: Dual, Schottky Barrier, U-Speed, 85V, 200mA, <1,5pF
- Source
- Published code list
Is it dead? The meter test is below: Schottky diode.
ECL112124BFRLDO regulator, E-CMOSLDO regulatorNot recordedE-CMOS
- What it is
- LDO regulator
- Maker
- E-CMOS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 2.4V±2%, 250mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
ISL9021IRUSZ-T6 pins, RenesasNot recorded6 pinsRenesas
- What it is
- Not recorded
- Maker
- Renesas
- Package
- Not recorded
- Pins
- 6
- Details
- equivalent [1.6V LDO]
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
LN1130P242VRLDO regulator, Shanghai Natlinear ElectronicsLDO regulatorNot recordedShanghai Natlinear Electronics
- What it is
- LDO regulator
- Maker
- Shanghai Natlinear Electronics
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 2.4V±2%, 300mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
PSM11PTRectifier, Chenmko EnterpriseRectifierNot recordedChenmko Enterprise
- What it is
- Rectifier
- Maker
- Chenmko Enterprise
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Diode: Rectifier, S-fast, 50V, 800mA
- Source
- Published code list
Is it dead? The meter test is below: Silicon diode.
R1131D151DNisshinbo Micro DevicesNot recordedNot recordedNisshinbo Micro Devices
- What it is
- Not recorded
- Maker
- Nisshinbo Micro Devices
- Package
- Not recorded
- Pins
- Not recorded
- Details
- VR-IC: LDO, CE, auto discharge, 1.5V±2%, 300mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
R1163D151BNisshinbo Micro DevicesNot recordedNot recordedNisshinbo Micro Devices
- What it is
- Not recorded
- Maker
- Nisshinbo Micro Devices
- Package
- Not recorded
- Pins
- Not recorded
- Details
- VR-IC: LDO, CE, 1.5V±1.5%, 150mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
R1225N252DNisshinbo Micro DevicesNot recordedNot recordedNisshinbo Micro Devices
- What it is
- Not recorded
- Maker
- Nisshinbo Micro Devices
- Package
- Not recorded
- Pins
- Not recorded
- Details
- VR-IC: PWM step-down DC-DC converter, 2,5V, 500KHz
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
S-1721E3012-I6T16 pins, ABLICNot recorded6 pinsABLIC
- What it is
- Not recorded
- Maker
- ABLIC
- Package
- Not recorded
- Pins
- 6
- Details
- equivalent [3.0/1.2V Dual LDO]
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
S-1721E3012-I6T1xLDO regulator, Seiko InstrumentsLDO regulatorNot recordedSeiko Instruments
- What it is
- LDO regulator
- Maker
- Seiko Instruments
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, Dual out, Vout1/Vout2=3.0V/1.2V±1.0%, 150mA, ±CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
SFM15MFrontier ElectronicsNot recordedNot recordedFrontier Electronics
- What it is
- Not recorded
- Maker
- Frontier Electronics
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Diode: Superfast rec. rectif, 300V, 1A, Vf<1.25V(1A), 35ns
- Source
- Published code list
Is it dead? The meter test is below: Silicon diode.
XC6223C15BNR-GLDO regulator, TorexLDO regulatorNot recordedTorex
- What it is
- LDO regulator
- Maker
- Torex
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 1.55V±20mV, 300mA, +CE, PDR
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
XC6225B202NR-GLDO regulator, TorexLDO regulatorNot recordedTorex
- What it is
- LDO regulator
- Maker
- Torex
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 2.0V±2%, 30mA, +CE, CL
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
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.
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.
Schottky diode
Diode range, part lifted or one leg off the pad. Red probe on the anode.
Working, it reads
About 0.15 to 0.45 V anode to cathode, roughly half a silicon diode, and open the other way.
Dead, it reads
- The same reading both ways round, near 0 V with a continuous beep or the same middling value: shorted.
- A reading the wrong way round as well: leaky.
- Open both ways: failed open.
- 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 large Schottky can read about 0.1 V forward and beep like a short, and leaks a little the wrong way when good, more when warm. It is shorted only if it reads the same both ways. Measure it cold, beside an identical cold one.
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.
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.
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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