SMD code 38H
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.
38H on a chip resistor
2.43 kΩ
2.43 kΩ resistor, 1%
EIA-96 precision code: 38 selects 2.43 from the E96 series and H multiplies by 1000. These are 1% parts.
Check it with a meter
Lift one end and measure across it. A good one reads 2.43 kΩ within 1%. Measuring it in circuit reads the parallel combination of everything around it, which is almost always lower, never higher: well above 2.43 kΩ on the board is a fault. Open, or well above 2.43 kΩ, means it has failed: burnt, cracked or corroded. That does not change what to fit: the marking still says 2.43 kΩ. A burnt resistor usually means the part it feeds drew too much, so find that before fitting a new one.
On a transistor or diode body (USP-6B, SOT-23-5, SOT-353), 38H is a part code instead. Those parts are listed below.
17 parts are printed 38H
Not sure which one you have?
Answer up to 4 quick questions and these 17 parts are ranked, with a meter test that settles it. It works on a dead part too.
AP6233A-15ULNGASOT-23-5LDO regulator, 5 pins, Anwell SemiconductorLDO regulatorSOT-23-55 pinsAnwell Semiconductor
- What it is
- LDO regulator
- Maker
- Anwell Semiconductor
- Package
- SOT-23-5
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 1.5V±2%, 300mA, -CE, PUR, H-free
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
AP6233A-15ULNGA1SOT-23-5LDO regulator, 5 pins, Anwell SemiconductorLDO regulatorSOT-23-55 pinsAnwell Semiconductor
- What it is
- LDO regulator
- Maker
- Anwell Semiconductor
- Package
- SOT-23-5
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 1.5V±1%, 300mA, -CE, PUR, H-free
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
AP6233A-15ULNGPSOT-353LDO regulator, 5 pins, Anwell SemiconductorLDO regulatorSOT-3535 pinsAnwell Semiconductor
- What it is
- LDO regulator
- Maker
- Anwell Semiconductor
- Package
- SOT-353
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 1.5V±2%, 300mA, -CE, PUR, H-free
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
AP6233A-15ULNGP1SOT-353LDO regulator, 5 pins, Anwell SemiconductorLDO regulatorSOT-3535 pinsAnwell Semiconductor
- What it is
- LDO regulator
- Maker
- Anwell Semiconductor
- Package
- SOT-353
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 1.5V±1%, 300mA, -CE, PUR, H-free
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
AP6233A-15ULNPASOT-23-5LDO regulator, 5 pins, Anwell SemiconductorLDO regulatorSOT-23-55 pinsAnwell Semiconductor
- What it is
- LDO regulator
- Maker
- Anwell Semiconductor
- Package
- SOT-23-5
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 1.5V±2%, 300mA, -CE, PUR
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
AP6233A-15ULNPA1SOT-23-5LDO regulator, 5 pins, Anwell SemiconductorLDO regulatorSOT-23-55 pinsAnwell Semiconductor
- What it is
- LDO regulator
- Maker
- Anwell Semiconductor
- Package
- SOT-23-5
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 1.5V±1%, 300mA, -CE, PUR
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
AP6233A-15ULNPPSOT-353LDO regulator, 5 pins, Anwell SemiconductorLDO regulatorSOT-3535 pinsAnwell Semiconductor
- What it is
- LDO regulator
- Maker
- Anwell Semiconductor
- Package
- SOT-353
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 1.5V±2%, 300mA, -CE, PUR
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
AP6233A-15ULNPP1SOT-353LDO regulator, 5 pins, Anwell SemiconductorLDO regulatorSOT-3535 pinsAnwell Semiconductor
- What it is
- LDO regulator
- Maker
- Anwell Semiconductor
- Package
- SOT-353
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 1.5V±1%, 300mA, -CE, PUR
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
7 more parts have no package on record
GS38HESchottky diode, Good-ArkSchottky diodeNot recordedNot recordedGood-Ark
- What it is
- Schottky diode
- Maker
- Good-Ark
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Schottky diode, 80 V, 3 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
AP6233A-15ULNGULDO regulator, Anwell SemiconductorLDO regulatorNot recordedNot recordedAnwell Semiconductor
- What it is
- LDO regulator
- Maker
- Anwell Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 1.5V±2%, 300mA, -CE, PUR, H-free
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
AP6233A-15ULNGU1LDO regulator, Anwell SemiconductorLDO regulatorNot recordedNot recordedAnwell Semiconductor
- What it is
- LDO regulator
- Maker
- Anwell Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 1.5V±1%, 300mA, -CE, PUR, H-free
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
AP6233A-15ULNPULDO regulator, Anwell SemiconductorLDO regulatorNot recordedNot recordedAnwell Semiconductor
- What it is
- LDO regulator
- Maker
- Anwell Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 1.5V±2%, 300mA, -CE, PUR
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
AP6233A-15ULNPU1LDO regulator, Anwell SemiconductorLDO regulatorNot recordedNot recordedAnwell Semiconductor
- What it is
- LDO regulator
- Maker
- Anwell Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 1.5V±1%, 300mA, -CE, PUR
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
APL5308-23AAnpecNot recordedNot recordedNot recordedAnpec
- What it is
- Not recorded
- Maker
- Anpec
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage regulator
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
APL5308-23BAnpecNot recordedNot recordedNot recordedAnpec
- What it is
- Not recorded
- Maker
- Anpec
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage regulator
- 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.
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.
Printed with a code easy to misread as 38H
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 38H
For a marking with its end worn or burnt off. Each code has a page of its own.
- 3BH011
- 3BH021
- 3BH031
- 3BH041
- 3BH051
- 3BH071
- 3BH081
- 3BH091
- 3BH101
- 3BH111
- 3BH121
- 3BH131
- 3BH141
- 3BH151
- 3BH161
- 3BH171
- 3BH181
- 3BH191
- 3BH201
- 3BH211
- 3BH221
- 3BH231
- 3BH241
Codes not listed here are printed on 30 more parts.
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