SMD code A1t
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, t, is lower case, which on NXP and Philips parts is a date or factory code, so it was set aside and A1 was searched.
212 parts are printed A1t
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.
CHP202KPTSOT-233 pins, Chenmko EnterpriseSOT-233 pinsChenmko Enterprise
- What it is
- Not recorded
- Maker
- Chenmko Enterprise
- Package
- SOT-23
- Pins
- 3
- Details
- Diode: Dual, Sw, 80V, 100mA, Vf<1.2V(100mA), 4ns
- Source
- Published code list
Is it dead? The meter test is below: Silicon diode.
CHP222PTSOT-4163 pins, Chenmko EnterpriseSOT-4163 pinsChenmko Enterprise
- What it is
- Not recorded
- Maker
- Chenmko Enterprise
- Package
- SOT-416
- Pins
- 3
- Details
- Diode: Dual, Sw, 80V, 100mA, Vf<1.2V(100mA), 4ns
- Source
- Published code list
Is it dead? The meter test is below: Silicon diode.
D70G.05T1SOT-893 pins, GenSOT-893 pinsGen
- What it is
- Not recorded
- Maker
- Gen
- Package
- SOT-89
- Pins
- 3
- Details
- Si-npn: Sw, 200/150V, 50mA
- Source
- Published code list
Is it dead? The meter test is below: This part.
ELM9821ABSOT-893 pins, ELM TechnologySOT-893 pinsELM Technology
- What it is
- Not recorded
- Maker
- ELM Technology
- Package
- SOT-89
- Pins
- 3
- Details
- Linear voltage regulator IC: 2.1V±2%, 200mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
ELM89211ASOT-893 pins, ELM TechnologySOT-893 pinsELM Technology
- What it is
- LDO regulator
- Maker
- ELM Technology
- Package
- SOT-89
- Pins
- 3
- Details
- Linear voltage regulator IC: LDO, 2.1V±2%, 300mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
FSS12SMA2 pins, FagSMA2 pinsFag
- What it is
- Not recorded
- Maker
- Fag
- Package
- SMA
- Pins
- 2
- Details
- Si-diode: Schottky Barrier Rectifier, 20V, 1A, Vf<0,75V(1A)
- Source
- Published code list
Is it dead? The meter test is below: Schottky diode.
HSMS-2801SOT-233 pins, BroadcomSOT-233 pinsBroadcom
- What it is
- Not recorded
- Maker
- Broadcom
- Package
- SOT-23
- Pins
- 3
- Details
- equivalent 5082-2800
- Source
- Published code list
Is it dead? The meter test is below: This part.
iDS930133A30SOT-233 pins, iDESYN SemiconductorSOT-233 pinsiDESYN Semiconductor
- What it is
- LDO regulator
- Maker
- iDESYN Semiconductor
- Package
- SOT-23
- Pins
- 3
- Details
- Linear voltage regulator IC: LDO, 3.3V+2.0%, 400mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
iDS930133A50SOT-23-55 pins, iDESYN SemiconductorSOT-23-55 pinsiDESYN Semiconductor
- What it is
- LDO regulator
- Maker
- iDESYN Semiconductor
- Package
- SOT-23-5
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 3.3V±2.0%, 400mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
iDS930133C50SOT-3535 pins, iDESYN SemiconductorSOT-3535 pinsiDESYN Semiconductor
- What it is
- LDO regulator
- Maker
- iDESYN Semiconductor
- Package
- SOT-353
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 3.3V±2.0%, 400mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
5 more parts have no package on record
DA2J10100LPanasonicNot recordedNot recordedPanasonic
- What it is
- Not recorded
- Maker
- Panasonic
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Diode: Sw, 80V, 100mA, Vf=0.92V(100mA), 1.2pF, 3ns
- Source
- Published code list
Is it dead? The meter test is below: Silicon diode.
DSE015Sanyo ElectricNot recordedNot recordedSanyo Electric
- What it is
- Not recorded
- Maker
- Sanyo Electric
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Diode: Sw, Hi-sp, 75V, 150mA, Vf<1.2V(100mA), 8ns, 12.5MHz
- Source
- Published code list
Is it dead? The meter test is below: Silicon diode.
HD74ALVC1G00VSRenesasNot recordedNot recordedRenesas
- What it is
- Not recorded
- Maker
- Renesas
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS logic IC: 2-input NAND gate
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
HVC300BRenesasNot recordedNot recordedRenesas
- What it is
- Not recorded
- Maker
- Renesas
- Package
- Not recorded
- Pins
- Not recorded
- Details
- C-diode: VHF-Tuning, 34V, 2.65..47pF(25V..2V/1MHz)
- Source
- Published code list
Is it dead? The meter test is below: Silicon diode.
IXD1233H121NR-GIXYSNot recordedNot recordedIXYS
- What it is
- LDO regulator
- Maker
- IXYS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 1.2V±1%, 200mA, +CE
- 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.
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.
This part
Diode range and ohms range, part lifted.
Working, it reads
Depends on what it is. The datasheet, or an identical part, says.
Dead, it reads
- Between two pins, the same reading both ways, near 0 V with a continuous beep: shorted.
- Open between every pair of pins: failed open, or a part that reads open when working.
- 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.
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.
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.
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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