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WhatSMDSign in

SMD code EZ in SOT-89

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.

3 parts in SOT-89 are printed EZ

Not sure which one you have?

Answer up to 4 quick questions and these 25 parts are ranked, with a meter test that settles it. It works on a dead part too.

  • 2SD2402-ZSOT-89NEC ElectronicsNot recordedNEC Electronics
    What it is
    Not recorded
    Maker
    NEC Electronics
    Package
    SOT-89
    Pins
    3
    Details
    Si-npn: AF, Sw, 50V, 5A, 2W, 170MHz, B=200..400
    Source
    Published code list

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

  • 2SD2402EZSOT-89RenesasNot recordedRenesas
    What it is
    Not recorded
    Maker
    Renesas
    Package
    SOT-89
    Pins
    3
    Source
    Published code list

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

  • HM7850PRSOT-89LDO regulator, Huamei SemiconductorLDO regulatorHuamei Semiconductor
    What it is
    LDO regulator
    Maker
    Huamei Semiconductor
    Package
    SOT-89
    Pins
    3
    Details
    Linear voltage regulator IC: LDO, 5.0V±2%, 500mA
    Source
    Published code list

    Is it dead? The meter test is below: Voltage regulator.

  • 12 more parts have no package on record. Nothing rules them out, so they stay.
    • DBTC-16-5-75X+RF coupler, Mini-CircuitsRF couplerMini-Circuits
      What it is
      RF coupler
      Maker
      Mini-Circuits
      Package
      Not recorded
      Pins
      Not recorded
      Details
      RF directional coupler, 5-1500 MHz
      Source
      Manufacturer datasheet

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

      Datasheetfor DBTC-16-5-75X+, opens in a new tab
    • MM3Z9V1BW-CZener diode, SeCoSZener diodeSeCoS
      What it is
      Zener diode
      Maker
      SeCoS
      Package
      Not recorded
      Pins
      Not recorded
      Source
      Manufacturer datasheet

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

      Datasheetfor MM3Z9V1BW-C, opens in a new tab
    • AP7340-32FS4-7LDO regulator, Diodes IncorporatedLDO regulatorDiodes Incorporated
      What it is
      LDO regulator
      Maker
      Diodes Incorporated
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 3.2V±1%, 150mA, +CE
      Source
      Published code list

      Is it dead? The meter test is below: Voltage regulator.

    • IXD5109C49ANVoltage supervisor, IXYSVoltage supervisorIXYS
      What it is
      Voltage supervisor
      Maker
      IXYS
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 4.9V±2%, +Reset PPO
      Source
      Published code list

      Is it dead? The meter test is below: Integrated circuit.

    • IXD5127C53KNRVoltage supervisor, IXYSVoltage supervisorIXYS
      What it is
      Voltage supervisor
      Maker
      IXYS
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 5.3V±0.8%, +Reset PPO, -MR, 800ms Rt delay
      Source
      Published code list

      Is it dead? The meter test is below: Integrated circuit.

    • IXD5127N54ENRVoltage supervisor, IXYSVoltage supervisorIXYS
      What it is
      Voltage supervisor
      Maker
      IXYS
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 5.4V±0.8%, -Reset ODO, -MR, 800ms Rt delay
      Source
      Published code list

      Is it dead? The meter test is below: Integrated circuit.

    • RP300K26BB3Voltage supervisor, RicohVoltage supervisorRicoh
      What it is
      Voltage supervisor
      Maker
      Ricoh
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 2.63V±1%, -Reset ODO, -MR, Rdt=100ms
      Source
      Published code list

      Is it dead? The meter test is below: Integrated circuit.

    • RP602Z385CDC-DC converter, RicohDC-DC converterRicoh
      What it is
      DC-DC converter
      Maker
      Ricoh
      Package
      Not recorded
      Pins
      Not recorded
      Details
      DC/DC voltage converter IC: PWM/VFM B-boost, 3.85V±1.5%, 1.5A, 2.6MHz, +CE, CL, Reset-pr.
      Source
      Published code list

      Is it dead? The meter test is below: Integrated circuit.

    • UN921TJPanNot recordedPan
      What it is
      Not recorded
      Maker
      Pan
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Si-npn-Digi: Sw, 50V, 100mA, 125mW, 150MHz, R1/R2=22k/47k
      Source
      Published code list

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

    • UNR921TJPanNot recordedPan
      What it is
      Not recorded
      Maker
      Pan
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Si-npn-Digi: Sw, 50V, 100mA, 125mW, 150MHz, R1/R2=22k/47k
      Source
      Published code list

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

    • XC6109C49ANVoltage supervisor, TorexVoltage supervisorTorex
      What it is
      Voltage supervisor
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      CMOS-IC: Voltage Detector 4,9V, Reset Push-pull output
      Source
      Published code list

      Is it dead? The meter test is below: Integrated circuit.

    • XC6119C49ANRVoltage supervisor, TorexVoltage supervisorTorex
      What it is
      Voltage supervisor
      Maker
      Torex
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Voltage detector IC: 4.9V±2%, -Reset PPO
      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.

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.

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.

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.

Printed with a code easy to misread as EZ

One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.

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