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WhatSMDSign in

SMD code CE 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.

7 parts in SOT-89 are printed CE

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.

  • BTNA44M3SOT-89NPN transistor, CYStekNPN transistorCYStek
    What it is
    NPN transistor
    Maker
    CYStek
    Package
    SOT-89
    Pins
    3
    Details
    400 V, 0.3 A NPN transistor
    Source
    Manufacturer datasheet

    Is it dead? The meter test is below: NPN transistor.

    Datasheetfor BTNA44M3, opens in a new tab
  • 2SA1364-ESOT-89MitNot recordedMit
    What it is
    Not recorded
    Maker
    Mit
    Package
    SOT-89
    Pins
    3
    Details
    Si-pnp: Relay-Drv, 60V, 1A, 500mW, B=150..300, 80MHz
    Source
    Published code list

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

  • AP130-19YSOT-89AnachipNot recordedAnachip
    What it is
    Not recorded
    Maker
    Anachip
    Package
    SOT-89
    Pins
    3
    Details
    VR-IC: LDO, 1,9V±2%, 300mA
    Source
    Published code list

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

  • BCX69SOT-89Diodes IncorporatedNot recordedDiodes Incorporated
    What it is
    Not recorded
    Maker
    Diodes Incorporated
    Package
    SOT-89
    Pins
    3
    Details
    Si-pnp: AF, 25/20V, 1A, 1W, B=85..375, >100MHz
    Source
    Published code list

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

  • ELM99431BSOT-89LDO regulator, ELM TechnologyLDO regulatorELM Technology
    What it is
    LDO regulator
    Maker
    ELM Technology
    Package
    SOT-89
    Pins
    3
    Details
    Linear voltage regulator IC: LDO, 4.3V±2%, 300mA
    Source
    Published code list

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

  • ELM99441BSOT-89LDO regulator, ELM TechnologyLDO regulatorELM Technology
    What it is
    LDO regulator
    Maker
    ELM Technology
    Package
    SOT-89
    Pins
    3
    Details
    Linear voltage regulator IC: LDO, 4.4V±2%, 300mA
    Source
    Published code list

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

  • XC62RP2402PSOT-89LDO regulator, TorexLDO regulatorTorex
    What it is
    LDO regulator
    Maker
    Torex
    Package
    SOT-89
    Pins
    3
    Details
    Linear voltage regulator IC: LDO, 2.4V±2%, 6mA, 500mW
    Source
    Published code list

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

  • 8 more parts have no package on record. Nothing rules them out, so they stay.

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.

NPN transistor

Diode range, part lifted or its base leg off the pad.

Working, it reads

Red probe on the base reads about 0.6 to 0.75 V to the emitter and to the collector, and open the other way round. Collector to emitter reads open both ways.

Dead, it reads

  • Collector to emitter the same both ways, near 0 V with a continuous beep: shorted. The commonest failure.
  • The base the same both ways to another pin, near 0 V or a middling value: a shorted junction.
  • Only one junction reads, or none: a junction has failed open. It then looks like a diode.
  • A reading the wrong way round, where it should be open: 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 pair of diodes with a common pin reads just like a transistor, and some transistors carry a built-in diode or resistor. The datasheet says which.

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.

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.

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.

Printed with a code easy to misread as CE

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 CE

For a marking with its end worn or burnt off. Each code has a page of its own.

Codes not listed here are printed on 309 more parts.

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