SMD code WH in SOD-123F
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.
4 parts in SOD-123F are printed WH
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.
BZT55C12SOD-123FZener diode, 2 pins, Formosa MicrosemiZener diode2 pinsFormosa Microsemi
- What it is
- Zener diode
- Maker
- Formosa Microsemi
- Package
- SOD-123F
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
GZF11CSOD-123FZener diode, 2 pins, Galaxy MicroelectronicsZener diode2 pinsGalaxy Microelectronics
- What it is
- Zener diode
- Maker
- Galaxy Microelectronics
- Package
- SOD-123F
- Pins
- 2
- Details
- 11V, 5%, Surface Mount Zener Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
TGZF11CSOD-123FZener diode, 2 pins, Galaxy MicroelectronicsZener diode2 pinsGalaxy Microelectronics
- What it is
- Zener diode
- Maker
- Galaxy Microelectronics
- Package
- SOD-123F
- Pins
- 2
- Details
- 11V, 5%, Surface Mount Zener Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
BZT52C11-FSOD-123FZener diode, 2 pins, Taitron ComponentsZener diode2 pinsTaitron Components
- What it is
- Zener diode
- Maker
- Taitron Components
- Package
- SOD-123F
- Pins
- 2
- Details
- Zener diode: 10.4..11.6V, Izt=5mA, 410mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
11 more parts have no package on record. Nothing rules them out, so they stay.
BZT52C12HEZener diode, Galaxy MicroelectronicsZener diodeNot recordedGalaxy Microelectronics
- What it is
- Zener diode
- Maker
- Galaxy Microelectronics
- Package
- Not recorded
- Pins
- Not recorded
- Details
- 12V, 500mW, Surface Mount Zener Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
RW4E065GNN-channel MOSFET, ROHMN-channel MOSFETNot recordedROHM
- What it is
- N-channel MOSFET
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Nch 30V 6.5A Power MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: N-channel MOSFET.
TBZT52C12HEZener diode, Galaxy MicroelectronicsZener diodeNot recordedGalaxy Microelectronics
- What it is
- Zener diode
- Maker
- Galaxy Microelectronics
- Package
- Not recorded
- Pins
- Not recorded
- Details
- 12V, 500mW, Surface Mount Zener Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
TC1-1T-152X-1+RF transformer, Mini-CircuitsRF transformerNot recordedMini-Circuits
- What it is
- RF transformer
- Maker
- Mini-Circuits
- Package
- Not recorded
- Pins
- Not recorded
- Details
- RF transformer, 5-1500 MHz
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: This part.
TC1-1T-152X-3+RF transformer, Mini-CircuitsRF transformerNot recordedMini-Circuits
- What it is
- RF transformer
- Maker
- Mini-Circuits
- Package
- Not recorded
- Pins
- Not recorded
- Details
- RF transformer, 5-1500 MHz
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: This part.
TC1-1T-152X-4+RF transformer, Mini-CircuitsRF transformerNot recordedMini-Circuits
- What it is
- RF transformer
- Maker
- Mini-Circuits
- Package
- Not recorded
- Pins
- Not recorded
- Details
- RF transformer, 5-1500 MHz
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: This part.
TC1-1T-152X+RF transformer, Mini-CircuitsRF transformerNot recordedMini-Circuits
- What it is
- RF transformer
- Maker
- Mini-Circuits
- Package
- Not recorded
- Pins
- Not recorded
- Details
- RF transformer, 5-1500 MHz
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: This part.
AX5505R25DC-DC converterDC-DC converterNot recordedNot recorded
- What it is
- DC-DC converter
- Maker
- Not recorded
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Micropower VFM Synchronous Step-up DC/DC Converter
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
AX5505R49DC-DC converterDC-DC converterNot recordedNot recorded
- What it is
- DC-DC converter
- Maker
- Not recorded
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Micropower VFM Synchronous Step-up DC/DC Converter
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
BCR108L3Digital transistor (NPN, resistors built in)Digital transistor (NPN, resistors built in)Not recordedNot recorded
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- Not recorded
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Si-npn-Digi: Sw, 50V, 100mA, 250mW, R1/R2=2.2k/47k, 170MHz
- Source
- Published code list
Is it dead? The meter test is below: Digital transistor.
BD46331GVoltage supervisor, ROHMVoltage supervisorNot recordedROHM
- What it is
- Voltage supervisor
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- CMOS-IC: Voltage Detector 3,3V, -Reset Push-pull output, 100ms
- 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.
Zener diode
Diode range for the forward check, part lifted, red probe on the anode. A bench supply for the Zener voltage.
Working, it reads
About 0.6 to 0.8 V forward and open in reverse on the diode range. Its Zener voltage shows only on a supply: feed it through a resistor that sets about 5 mA, cathode to positive, read quickly, and it should hold near its rated voltage.
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, forward too: failed open.
- Holds well off its rated voltage on the supply test: drifted.
- A soft knee, or a voltage that creeps on the supply test: 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 meter's diode range stops at about 2 to 3 V, so almost every Zener reads open in reverse on it, good or bad; a 3 V meter may just show a 2.4 or 2.7 V part. Above about 3 V the meter cannot tell a Zener from a plain diode.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
N-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 source, black on the drain: 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. A drain short can be the load. 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.
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.
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.
Digital transistor
Ohms range, part lifted. The datasheet gives the built-in resistors: R1 in series with the base, R2 from base to emitter.
Working, it reads
Base to emitter reads about R1 plus R2 either way round, about 20 kΩ on a 10 k and 10 k part, give or take their wide tolerance. Collector to emitter reads open. A part with no R2 reads a junction behind R1 one way instead.
Dead, it reads
- Collector to emitter the same both ways, near 0 Ω with a continuous beep: shorted.
- From the base, open or far above R1 plus R2: R1 has failed. Static damage shows here most often.
- Base to emitter near 0 Ω: failed short.
- 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:
- The readings depend on the resistor values, so an identical part elsewhere on the board is the surest reference. Measure it the same way.
- Watch for:
- On the diode range a good part with 10 kΩ resistors reads open on every pair, so a good part looks dead there. Use the ohms range.
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 WH
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 WH
For a marking with its end worn or burnt off. Each code has a page of its own.
Did you find your part?
Open this in the search to correct a character or try another package.