SMD code A3H
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.
16 parts are printed A3H
Not sure which one you have?
Answer up to 4 quick questions and these 16 parts are ranked, with a meter test that settles it. It works on a dead part too.
BRCS120P012MCSOT-23P-channel MOSFET, 3 pins, Blue RocketP-channel MOSFETSOT-233 pinsBlue Rocket
- What it is
- P-channel MOSFET
- Maker
- Blue Rocket
- Package
- SOT-23
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: P-channel MOSFET.
CMS3439KDW-HFSOT-363Complementary MOSFET pair (N-channel and P-channel), 6 pins, ComchipComplementary MOSFET pair (N-channel and P-channel)SOT-3636 pinsComchip
- What it is
- Complementary MOSFET pair (N-channel and P-channel)
- Maker
- Comchip
- Package
- SOT-363
- Pins
- 6
- Details
- 20 V, 0.8 A N+P-channel MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: MOSFET pair.
MTA300C02KC6SOT-563Complementary MOSFET pair (N-channel and P-channel), 6 pins, CYStekComplementary MOSFET pair (N-channel and P-channel)SOT-5636 pinsCYStek
- What it is
- Complementary MOSFET pair (N-channel and P-channel)
- Maker
- CYStek
- Package
- SOT-563
- Pins
- 6
- Details
- 20 V, 1/-0.65 A N+P-channel MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: MOSFET pair.
MTA300C02KS6RSOT-363Complementary MOSFET pair (N-channel and P-channel), 6 pins, CYStekComplementary MOSFET pair (N-channel and P-channel)SOT-3636 pinsCYStek
- What it is
- Complementary MOSFET pair (N-channel and P-channel)
- Maker
- CYStek
- Package
- SOT-363
- Pins
- 6
- Details
- 20 V, 0.8/-0.5 A N+P-channel MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: MOSFET pair.
APR3103-43BSOT-23-5Voltage supervisor, 5 pins, Anpec ElectronicsVoltage supervisorSOT-23-55 pinsAnpec Electronics
- What it is
- Voltage supervisor
- Maker
- Anpec Electronics
- Package
- SOT-23-5
- Pins
- 5
- Details
- Voltage detector IC: 4.38V±1.5%, -MR, -Reset ODO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
APR3123-43BSOT-23-55 pins, AnpecNot recordedSOT-23-55 pinsAnpec
- What it is
- Not recorded
- Maker
- Anpec
- Package
- SOT-23-5
- Pins
- 5
- Details
- CMOS-IC: Voltage detector, 4.38V, -MR, -Reset Open drain output
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
LN2351P1732MSOT-23DC-DC converter, 3 pins, Shanghai Natlinear ElectronicsDC-DC converterSOT-233 pinsShanghai Natlinear Electronics
- What it is
- DC-DC converter
- Maker
- Shanghai Natlinear Electronics
- Package
- SOT-23
- Pins
- 3
- Details
- DC/DC voltage converter IC: PFM st-up, 1.7V±2%, 400mA, 180kHz
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
LN2351P1732PSOT-89DC-DC converter, 3 pins, Shanghai Natlinear ElectronicsDC-DC converterSOT-893 pinsShanghai Natlinear Electronics
- What it is
- DC-DC converter
- Maker
- Shanghai Natlinear Electronics
- Package
- SOT-89
- Pins
- 3
- Details
- DC/DC voltage converter IC: PFM st-up, 1.7V±2%, 400mA, 180kHz
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
LN2351P1732SSOT-23-5DC-DC converter, 5 pins, Shanghai Natlinear ElectronicsDC-DC converterSOT-23-55 pinsShanghai Natlinear Electronics
- What it is
- DC-DC converter
- Maker
- Shanghai Natlinear Electronics
- Package
- SOT-23-5
- Pins
- 5
- Details
- DC/DC voltage converter IC: PFM st-up, 1.7V±2%, 400mA, 180kHz, +CE
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6114A417MRSOT-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 1.7V, ±Reset PPO, Wt=200ms, Rt=3.13ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6114A447MRSOT-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 4.7V, ±Reset PPO, Wt=200ms, Rt=3.13ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6365A363MRSOT-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, 300kHz, 3.6V±2.5%, 1A, +CE
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6367A363MRSOT-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, 3.6V±2.5%, 200mA, 300kHz, +CE
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6371A362PSOT-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, 180kHz, 3.6V±2.5%, 100mA
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
XC6371C362PSOT-89-5DC-DC converter, 5 pins, TorexDC-DC converterSOT-89-55 pinsTorex
- What it is
- DC-DC converter
- Maker
- Torex
- Package
- SOT-89-5
- Pins
- 5
- Details
- DC/DC voltage converter IC: PWM st-up, 180kHz, 3.6V±2.5%, 100mA, +CE
- 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.
P-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 drain, black on the source: 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. 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.
MOSFET pair
Diode range, part lifted. Test drain to source first, then short gate to source and test again. Test each MOSFET on its own pins, as the datasheet's pinout gives them.
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.
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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