SMD code A53
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.
18 parts are printed A53
Not sure which one you have?
Answer up to 4 quick questions and these 18 parts are ranked, with a meter test that settles it. It works on a dead part too.
FM503SMCRectifier, 2 pins, Formosa MicrosemiRectifierSMC2 pinsFormosa Microsemi
- What it is
- Rectifier
- Maker
- Formosa Microsemi
- Package
- SMC
- Pins
- 2
- Details
- Rectifier diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
FM503-Q1SMCRectifier, 2 pins, Formosa MicrosemiRectifierSMC2 pinsFormosa Microsemi
- What it is
- Rectifier
- Maker
- Formosa Microsemi
- Package
- SMC
- Pins
- 2
- Details
- Rectifier diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
AAT60253A-S5SOT-23-5Voltage supervisor, 5 pins, Advanced Analog TechnologyVoltage supervisorSOT-23-55 pinsAdvanced Analog Technology
- What it is
- Voltage supervisor
- Maker
- Advanced Analog Technology
- Package
- SOT-23-5
- Pins
- 5
- Details
- Voltage detector IC: 5.3V±2%, -Reset PPO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
AAT60253A-S15SOT-343Voltage supervisor, 4 pins, Advanced Analog TechnologyVoltage supervisorSOT-3434 pinsAdvanced Analog Technology
- What it is
- Voltage supervisor
- Maker
- Advanced Analog Technology
- Package
- SOT-343
- Pins
- 4
- Details
- Voltage detector IC: 5.3V±2%, -Reset PPO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
ELM9753NABSOT-89Voltage supervisor, 3 pins, ELM TechnologyVoltage supervisorSOT-893 pinsELM Technology
- What it is
- Voltage supervisor
- Maker
- ELM Technology
- Package
- SOT-89
- Pins
- 3
- Details
- Voltage detector IC: 5.3V±2.5%, +Reset ODO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
ELM9753NBBSOT-23Voltage supervisor, 3 pins, ELM TechnologyVoltage supervisorSOT-233 pinsELM Technology
- What it is
- Voltage supervisor
- Maker
- ELM Technology
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 5.3V±2.5%, +Reset ODO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
HD74ALVC2G53USSSOPRenesasNot recordedSSOPNot recordedRenesas
- What it is
- Not recorded
- Maker
- Renesas
- Package
- SSOP
- Pins
- Not recorded
- Details
- CMOS logic IC: 2-channel analog multiplexer/demultiplexer
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC31PNS0053AMSOT-233 pins, TorexNot recordedSOT-233 pinsTorex
- What it is
- Not recorded
- Maker
- Torex
- Package
- SOT-23
- Pins
- 3
- Details
- VR-IC: Temperature Sensitive, -T°coefficient, 5,3V±5%, 50mA
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC31PNS0053APSOT-893 pins, TorexNot recordedSOT-893 pinsTorex
- What it is
- Not recorded
- Maker
- Torex
- Package
- SOT-89
- Pins
- 3
- Details
- VR-IC: Temperature Sensitive, -T°coefficient, 5,3V±5%, 50mA
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC31PPS0053AMSOT-233 pins, TorexNot recordedSOT-233 pinsTorex
- What it is
- Not recorded
- Maker
- Torex
- Package
- SOT-23
- Pins
- 3
- Details
- VR-IC: Temperature Sensitive, +T°coefficient, 5,3V±5%, 50mA
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC31PPS0053APSOT-893 pins, TorexNot recordedSOT-893 pinsTorex
- What it is
- Not recorded
- Maker
- Torex
- Package
- SOT-89
- Pins
- 3
- Details
- VR-IC: Temperature Sensitive, +T°coefficient, 5,3V±5%, 50mA
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6114A634MRSOT-23-5Voltage supervisor, 5 pins, TorexVoltage supervisorSOT-23-55 pinsTorex
- What it is
- Voltage supervisor
- Maker
- Torex
- Package
- SOT-23-5
- Pins
- 5
- Details
- CMOS-IC: VDet 3.4V, ±Reset PPO, Wt=1.6s, Rt=3.13ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6365A532MRSOT-23-5DC-DC converter, 5 pins, TorexDC-DC converterSOT-23-55 pinsTorex
- What it is
- DC-DC converter
- Maker
- Torex
- Package
- SOT-23-5
- Pins
- 5
- Details
- DC/DC voltage converter IC: PWM st-dwn, 180kHz, 5.3V±2.5%, 1A, +CE
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6367A532MRSOT-23-5DC-DC converter, 5 pins, TorexDC-DC converterSOT-23-55 pinsTorex
- What it is
- DC-DC converter
- Maker
- Torex
- Package
- SOT-23-5
- Pins
- 5
- Details
- DC/DC voltage converter IC: PWM st-up, 5.3V±2.5%, 200mA, 180kHz, +CE
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6371A531PSOT-89DC-DC converter, 3 pins, TorexDC-DC converterSOT-893 pinsTorex
- What it is
- DC-DC converter
- Maker
- Torex
- Package
- SOT-89
- Pins
- 3
- Details
- DC/DC voltage converter IC: PWM st-up, 100kHz, 5.3V±2.5%, 100mA
- 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.
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.
Printed with a code easy to misread as A53
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 A53
For a marking with its end worn or burnt off. Each code has a page of its own.
- A5301
- A5311
- A5321
- A5331
- A5341
- A5351
- A5361
- A5371
- A5381
- A5391
- A53A4
- A53B1
- A53C2
- AS3D1
- AS3G1
- AS3J1
- AS3K1
- AS3M1
- AS302
- AS312
- AS322
Codes not listed here are printed on 9 more parts.
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