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SMD code Z9p

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, p, is lower case, which on NXP and Philips parts is a date or factory code, so it was set aside and Z9 was searched.

106 parts are printed Z9p

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.

  • 2SJ465SOT-89P-channel MOSFET, 3 pins, ToshibaP-channel MOSFETSOT-893 pinsToshiba
    What it is
    P-channel MOSFET
    Maker
    Toshiba
    Package
    SOT-89
    Pins
    3
    Details
    p-MOS*-e: V-MOS, LogL, 16V, 2A, <0,71Ω(5A)
    Source
    Published code list

    Is it dead? The meter test is below: P-channel MOSFET.

  • ACZRT55C10-GSOT-23Zener diode, 3 pins, ComchipZener diodeSOT-233 pinsComchip
    What it is
    Zener diode
    Maker
    Comchip
    Package
    SOT-23
    Pins
    3
    Details
    Zener diode: 9.4..10.6V, Izt=5.0mA, Zzt=20, 350mW
    Source
    Published code list

    Is it dead? The meter test is below: Zener diode.

  • BAS316PTSOD-3232 pins, Chenmko EnterpriseNot recordedSOD-3232 pinsChenmko Enterprise
    What it is
    Not recorded
    Maker
    Chenmko Enterprise
    Package
    SOD-323
    Pins
    2
    Details
    Diode: Sw, 100V, 250mA, Vf<1.25V(150mA), 4ns
    Source
    Published code list

    Is it dead? The meter test is below: Silicon diode.

  • BZF10C39SOD-123FZener diode, 2 pins, Diodesemi TechnologyZener diodeSOD-123F2 pinsDiodesemi Technology
    What it is
    Zener diode
    Maker
    Diodesemi Technology
    Package
    SOD-123F
    Pins
    2
    Details
    Zener diode: 37.1..41.0V, Izt=6.5mA, Zzt=60, 1W
    Source
    Published code list

    Is it dead? The meter test is below: Zener diode.

  • BZT52-C10TSOD-5232 pins, Micro Commercial ComponentsNot recordedSOD-5232 pinsMicro Commercial Components
    What it is
    Not recorded
    Maker
    Micro Commercial Components
    Package
    SOD-523
    Pins
    2
    Details
    Z-diode: 10V±5%, Izt=5mA, Zzt=20Ω, 100mW
    Source
    Published code list

    Is it dead? The meter test is below: Silicon diode.

  • BZT52C5V6SSOD-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.

  • BZT52C10TSOD-523Zener diode, 2 pins, Micro Commercial ComponentsZener diodeSOD-5232 pinsMicro Commercial Components
    What it is
    Zener diode
    Maker
    Micro Commercial Components
    Package
    SOD-523
    Pins
    2
    Details
    Z-diode: 10V±5%, Izt=5mA, Zzt=20Ω, 150mW
    Source
    Published code list

    Is it dead? The meter test is below: Zener diode.

  • BZV49-C10SOT-893 pins, InfineonNot recordedSOT-893 pinsInfineon
    What it is
    Not recorded
    Maker
    Infineon
    Package
    SOT-89
    Pins
    3
    Details
    Z-diode: 10V±5%, Izt=5mA, 1W
    Source
    Published code list

    Is it dead? The meter test is below: Silicon diode.

  • BZV49C10SOT-893 pinsNot recordedSOT-893 pinsNot recorded
    What it is
    Not recorded
    Maker
    Not recorded
    Package
    SOT-89
    Pins
    3
    Details
    equivalent BZV85C10
    Source
    Published code list

    Is it dead? The meter test is below: This part.

  • BZX84-A10SOT-23Zener diode, 3 pins, Central SemiconductorZener diodeSOT-233 pinsCentral Semiconductor
    What it is
    Zener diode
    Maker
    Central Semiconductor
    Package
    SOT-23
    Pins
    3
    Details
    10 V ±1% voltage regulator (Zener) diode
    Source
    Published code list

    Is it dead? The meter test is below: Zener diode.

  • BZX84-B10SOT-23Zener diode, 3 pins, Central SemiconductorZener diodeSOT-233 pinsCentral Semiconductor
    What it is
    Zener diode
    Maker
    Central Semiconductor
    Package
    SOT-23
    Pins
    3
    Details
    10 V ±2% voltage regulator (Zener) diode
    Source
    Published code list

    Is it dead? The meter test is below: Zener diode.

  • BZX84-C10-VSOT-233 pins, VishayNot recordedSOT-233 pinsVishay
    What it is
    Not recorded
    Maker
    Vishay
    Package
    SOT-23
    Pins
    3
    Details
    Z-diode: 10V±5%, Zzt=8.0Ω(20mA), 300mW
    Source
    Published code list

    Is it dead? The meter test is below: Silicon diode.

  • 3 more parts have no package on record
    • ZGFM1039B-MSTZener diode, Formosa MicrosemiZener diodeNot recordedNot recordedFormosa Microsemi
      What it is
      Zener diode
      Maker
      Formosa Microsemi
      Package
      Not recorded
      Pins
      Not recorded
      Source
      Manufacturer datasheet

      Is it dead? The meter test is below: Zener diode.

    • ZGFM1039B-MST-Q1Zener diode, Formosa MicrosemiZener diodeNot recordedNot recordedFormosa Microsemi
      What it is
      Zener diode
      Maker
      Formosa Microsemi
      Package
      Not recorded
      Pins
      Not recorded
      Source
      Manufacturer datasheet

      Is it dead? The meter test is below: Zener diode.

    • BZX84C10-VZener diode, VishayZener diodeNot recordedNot recordedVishay
      What it is
      Zener diode
      Maker
      Vishay
      Package
      Not recorded
      Pins
      Not recorded
      Source
      Published code list

      Is it dead? The meter test is below: Zener 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.

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.

Silicon diode

Diode range, part lifted or one leg off the pad. Red probe on the anode.

Working, it reads

About 0.5 to 0.8 V anode to cathode, and open the other way. Small switching diodes read about 0.6 to 0.7 V; large rectifiers can read a little lower.

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: failed open.
  • A reading the wrong way round as well: 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 three-pin body can hold two diodes. With a common pin they read two junctions from that pin, just like a transistor; in series they read two drops end to end. Test each pair the datasheet names.

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.

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