SMD code WCs
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, s, is lower case, which on NXP and Philips parts is a date or factory code, so it was set aside and WC was searched.
112 parts are printed WCs
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.
MM3Z11VSSOD-323Zener diode, 2 pins, onsemiZener diodeSOD-3232 pinsonsemi
- What it is
- Zener diode
- Maker
- onsemi
- Package
- SOD-323
- Pins
- 2
- Details
- Zener Voltage Regulators MM3ZxxxST1G Series, SZMM3ZxxxST1G Series
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
PZ3D7V5HSOD-323Zener diode, 2 pins, PrisemiZener diodeSOD-3232 pinsPrisemi
- What it is
- Zener diode
- Maker
- Prisemi
- Package
- SOD-323
- Pins
- 2
- Details
- Zener diode, 7.5 V, 5.5 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
S-LBZT52C7V5T1GSOD-123Zener diode, 2 pins, LRCZener diodeSOD-1232 pinsLRC
- What it is
- Zener diode
- Maker
- LRC
- Package
- SOD-123
- Pins
- 2
- Details
- Zener diode, VZ Min 7 V, VZ Nom 7.5 V, VZ Max 7.9 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
SN74LV1T04DCKSOT-353Logic gate, 5 pins, Texas InstrumentsLogic gateSOT-3535 pinsTexas Instruments
- What it is
- Logic gate
- Maker
- Texas Instruments
- Package
- SOT-353
- Pins
- 5
- Details
- Single Power Supply Inverter Gate CMOS Logic Level Shifter
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
TBZT52C7V5SOD-123Zener diode, 2 pins, Galaxy MicroelectronicsZener diodeSOD-1232 pinsGalaxy Microelectronics
- What it is
- Zener diode
- Maker
- Galaxy Microelectronics
- Package
- SOD-123
- Pins
- 2
- Details
- 7.5V, 500mW, Surface Mount Zener Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
TBZT52C7V5SSOD-323Zener diode, 2 pins, Galaxy MicroelectronicsZener diodeSOD-3232 pinsGalaxy Microelectronics
- What it is
- Zener diode
- Maker
- Galaxy Microelectronics
- Package
- SOD-323
- Pins
- 2
- Details
- 7.5V, 200mW, Surface Mount Zener Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
TGZF6V8CSOD-123FZener diode, 2 pins, Galaxy MicroelectronicsZener diodeSOD-123F2 pinsGalaxy Microelectronics
- What it is
- Zener diode
- Maker
- Galaxy Microelectronics
- Package
- SOD-123F
- Pins
- 2
- Details
- 6.8V, 5%, Surface Mount Zener Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
TZTC6V8WSSOT-323Zener diode, 3 pins, Taitron ComponentsZener diodeSOT-3233 pinsTaitron Components
- What it is
- Zener diode
- Maker
- Taitron Components
- Package
- SOT-323
- Pins
- 3
- Details
- SMD Zener Diodes (Three Terminals) - 200mW
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
2SC5214-CSOT-893 pins, Isahaya ElectronicsNot recordedSOT-893 pinsIsahaya Electronics
- What it is
- Not recorded
- Maker
- Isahaya Electronics
- Package
- SOT-89
- Pins
- 3
- Details
- Si-npn: AF, Amp-Drv, 30V, 1A, 500mW, 100MHz, B=55..110
- Source
- Published code list
Is it dead? The meter test is below: This part.
APX803S05-46SRSOT-23Voltage supervisor, 3 pins, Diodes IncorporatedVoltage supervisorSOT-233 pinsDiodes Incorporated
- What it is
- Voltage supervisor
- Maker
- Diodes Incorporated
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 4.63V±1.5%, -Reset ODO, Rdt=50ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
BCR133FTSFP-3Digital transistor (NPN, resistors built in), 3 pins, InfineonDigital transistor (NPN, resistors built in)TSFP-33 pinsInfineon
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- Infineon
- Package
- TSFP-3
- Pins
- 3
- Details
- Si-npn-Digi: Sw, 50V, 100mA, 250mW, R1/R2=10k/10k, 130MHz
- Source
- Published code list
Is it dead? The meter test is below: Digital transistor.
BCR133SSOT-3636 pinsNot recordedSOT-3636 pinsNot recorded
- What it is
- Not recorded
- Maker
- Not recorded
- Package
- SOT-363
- Pins
- 6
- Details
- dual BCR133
- Source
- Published code list
Is it dead? The meter test is below: This part.
BCR133TSOT-523Digital transistor (NPN, resistors built in), 3 pins, InfineonDigital transistor (NPN, resistors built in)SOT-5233 pinsInfineon
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- Infineon
- Package
- SOT-523
- Pins
- 3
- Details
- npn dig 50V 0.1A 10k+10k
- Source
- Published code list
Is it dead? The meter test is below: Digital transistor.
2 more parts have no package on record
AX5505R44DC-DC converterDC-DC converterNot recordedNot 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.
BCR133L3Digital transistor (NPN, resistors built in), InfineonDigital transistor (NPN, resistors built in)Not recordedNot recordedInfineon
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- Infineon
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Si-npn-Digi: Sw, 50V, 100mA, 250mW, R1/R2=10k/10k, 130MHz
- Source
- Published code list
Is it dead? The meter test is below: Digital transistor.
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.
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.
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.
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.
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