SMD code JZ-
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.
58 parts are printed JZ-
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.
BZT52-B13SSOD-323Zener diode, 2 pins, Taiwan SemiconductorZener diodeSOD-3232 pinsTaiwan Semiconductor
- What it is
- Zener diode
- Maker
- Taiwan Semiconductor
- Package
- SOD-323
- Pins
- 2
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
BZX84C5V6CCSOT-23Zener diode, 3 pins, JinYu semiconductorZener diodeSOT-233 pinsJinYu semiconductor
- What it is
- Zener diode
- Maker
- JinYu semiconductor
- Package
- SOT-23
- Pins
- 3
- Details
- Zener diode: Dual, 5.2..6.0V, Zzt=40, Izt=5mA, 350mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
CD214A-T51ASMATVS diode, 2 pins, BournsTVS diodeSMA2 pinsBourns
- What it is
- TVS diode
- Maker
- Bourns
- Package
- SMA
- Pins
- 2
- Details
- TVS: 51V, 4.9A, 400W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
DZ23C5V6SOT-23Zener diode, 3 pins, Luguang Electronic TechnologyZener diodeSOT-233 pinsLuguang Electronic Technology
- What it is
- Zener diode
- Maker
- Luguang Electronic Technology
- Package
- SOT-23
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
MM3Z13VBWSOD-323Zener diode, 2 pins, Tak Cheong SemiconductorZener diodeSOD-3232 pinsTak Cheong Semiconductor
- What it is
- Zener diode
- Maker
- Tak Cheong Semiconductor
- Package
- SOD-323
- Pins
- 2
- Details
- Zener diode: 12.74..13.26V, Izt=5mA, Zzt=30, 200mW
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
P2SMLJ51A-ASOD-123FTVS diode, 2 pins, YeashinTVS diodeSOD-123F2 pinsYeashin
- What it is
- TVS diode
- Maker
- Yeashin
- Package
- SOD-123F
- Pins
- 2
- Details
- Transient voltage supressor: Vrwm=51.0V, Vbr=56.70..62.70V, Ipp=2.4A, 200W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
P4SMAJ51ASMATVS diode, 2 pins, PanjitTVS diodeSMA2 pinsPanjit
- What it is
- TVS diode
- Maker
- Panjit
- Package
- SMA
- Pins
- 2
- Details
- SMD TVS - 400W
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
PT7M6220CHC3ESOT-323Voltage supervisor, 3 pins, Pericom TechnologyVoltage supervisorSOT-3233 pinsPericom Technology
- What it is
- Voltage supervisor
- Maker
- Pericom Technology
- Package
- SOT-323
- Pins
- 3
- Details
- Voltage detector IC: 2.0V±1.5%, +Reset PPO, L-free
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
PT7M6220CHC4SOT-23-5Voltage supervisor, 5 pins, Pericom TechnologyVoltage supervisorSOT-23-55 pinsPericom Technology
- What it is
- Voltage supervisor
- Maker
- Pericom Technology
- Package
- SOT-23-5
- Pins
- 5
- Details
- Voltage detector IC: 2.0V±1.5%,+Reset PPO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
PT7M6220CHC4ESOT-23-5Voltage supervisor, 5 pins, Pericom TechnologyVoltage supervisorSOT-23-55 pinsPericom Technology
- What it is
- Voltage supervisor
- Maker
- Pericom Technology
- Package
- SOT-23-5
- Pins
- 5
- Details
- Voltage detector IC: 2.0V±1.5%,+Reset PPO, Lead free
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
PT7M6220CHTA3ESOT-23Voltage supervisor, 3 pins, Pericom TechnologyVoltage supervisorSOT-233 pinsPericom Technology
- What it is
- Voltage supervisor
- Maker
- Pericom Technology
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 2.0V±1.5%, +Reset PPO, L-free
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
R3160N144ASOT-23-6Voltage supervisor, 6 pins, RicohVoltage supervisorSOT-23-66 pinsRicoh
- What it is
- Voltage supervisor
- Maker
- Ricoh
- Package
- SOT-23-6
- Pins
- 6
- Details
- Voltage detector IC: 14.4V±1.75%, -Reset ODO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
3 more parts have no package on record
DRC9A15EDigital transistor (NPN, resistors built in), PanasonicDigital transistor (NPN, resistors built in)Not recordedNot recordedPanasonic
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- Panasonic
- Package
- Not recorded
- Pins
- Not recorded
- Details
- NPN transistor: Sw, 50V, 80mA, 125mW, R1/R2=100k/100k
- Source
- Published code list
Is it dead? The meter test is below: Digital transistor.
LT4ME51ATVS diode, Lite-On SemiconductorTVS diodeNot recordedNot recordedLite-On Semiconductor
- What it is
- TVS diode
- Maker
- Lite-On Semiconductor
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Transient voltage supressor: Vrwm=51V, Vbr=56.7..62.7V, Ipp=4.9A, 400W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
P2SMSJ51ATVS diode, YeashinTVS diodeNot recordedNot recordedYeashin
- What it is
- TVS diode
- Maker
- Yeashin
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Transient voltage supressor: Vrwm=51V, Vbr=56.7..62.7V, Ipp=2.4A, 200W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
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.
TVS or ESD protection diode
Diode range, from the protected line to ground, part lifted if you can.
Working, it reads
A one-way part reads about 0.6 to 0.8 V forward and open in reverse. A two-way part reads open both ways. Arrays with several lines read as the datasheet's diagram draws them.
Dead, it reads
- From the line to ground, the same reading both ways, near 0 V with a continuous beep: shorted.
- A reading both ways on a one-way part: leaky.
- A one-way part open both ways: failed open.
- On the board
- , a line reading shorted to ground can be this part or anything else on that line. Lift it: if the short goes with it, it has failed.
- Compare:
- The same part on the next line or connector pin is the healthy reading to compare with.
- Watch for:
- A two-way part reads open both ways when it is good, exactly like one that has failed open. The meter cannot tell them apart; an identical part on the next line can.
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.
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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