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SMD code E2p

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 E2 was searched.

260 parts are printed E2p

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.

  • MMSZ5232B-P2-HFSOD-123Zener diode, 2 pins, ComchipZener diodeSOD-1232 pinsComchip
    What it is
    Zener diode
    Maker
    Comchip
    Package
    SOD-123
    Pins
    2
    Details
    5.6 V 0.35 mW zener diode
    Source
    Manufacturer datasheet

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

  • MMSZ5232B-Q1SOD-123FZener diode, 2 pins, Formosa MicrosemiZener diodeSOD-123F2 pinsFormosa Microsemi
    What it is
    Zener diode
    Maker
    Formosa Microsemi
    Package
    SOD-123F
    Pins
    2
    Source
    Manufacturer datasheet

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

  • MMSZ5232BCR-CSOD-123Zener diode, 2 pins, SeCoSZener diodeSOD-1232 pinsSeCoS
    What it is
    Zener diode
    Maker
    SeCoS
    Package
    SOD-123
    Pins
    2
    Source
    Manufacturer datasheet

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

  • MMSZ5232BQSOD-123Zener diode, 2 pins, Yangjie Electronic TechZener diodeSOD-1232 pinsYangjie Electronic Tech
    What it is
    Zener diode
    Maker
    Yangjie Electronic Tech
    Package
    SOD-123
    Pins
    2
    Source
    Manufacturer datasheet

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

  • MMSZ5232BSSOD-323Zener diode, 2 pins, DC ComponentsZener diodeSOD-3232 pinsDC Components
    What it is
    Zener diode
    Maker
    DC Components
    Package
    SOD-323
    Pins
    2
    Source
    Manufacturer datasheet

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

  • MMSZ5232BS-AUSOD-323Zener diode, 2 pins, PanjitZener diodeSOD-3232 pinsPanjit
    What it is
    Zener diode
    Maker
    Panjit
    Package
    SOD-323
    Pins
    2
    Source
    Manufacturer datasheet

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

  • MMSZ5232BS-MSSOD-323Zener diode, 2 pins, MSKSEMIZener diodeSOD-3232 pinsMSKSEMI
    What it is
    Zener diode
    Maker
    MSKSEMI
    Package
    SOD-323
    Pins
    2
    Source
    Manufacturer datasheet

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

  • MMSZ5232BSCR-CSOD-323Zener diode, 2 pins, SeCoSZener diodeSOD-3232 pinsSeCoS
    What it is
    Zener diode
    Maker
    SeCoS
    Package
    SOD-323
    Pins
    2
    Source
    Manufacturer datasheet

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

  • MMSZ5232BT1GSOD-123Zener diode, 2 pins, HXYZener diodeSOD-1232 pinsHXY
    What it is
    Zener diode
    Maker
    HXY
    Package
    SOD-123
    Pins
    2
    Details
    Zener diode, 5.6 V, 0.02 A
    Source
    Manufacturer datasheet

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

  • MMSZ5232BWSSOD-323Zener diode, 2 pins, Taitron ComponentsZener diodeSOD-3232 pinsTaitron Components
    What it is
    Zener diode
    Maker
    Taitron Components
    Package
    SOD-323
    Pins
    2
    Details
    SMD Zener Diodes (Two Terminals) - 200mW
    Source
    Manufacturer datasheet

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

  • PESD5V0L5UVSOT-5636 pins, UMWNot recordedSOT-5636 pinsUMW
    What it is
    Not recorded
    Maker
    UMW
    Package
    SOT-563
    Pins
    6
    Source
    Manufacturer datasheet

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

  • PMEG1020EASOD-323Schottky diode, 2 pins, NexperiaSchottky diodeSOD-3232 pinsNexperia
    What it is
    Schottky diode
    Maker
    Nexperia
    Package
    SOD-323
    Pins
    2
    Details
    2 A ultra low VF Schottky barrier rectifier
    Source
    Manufacturer datasheet

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

  • S-LBZT52B6V2T1GSOD-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 6.06 V, VZ Nom 6.2 V, VZ Max 6.33 V
    Source
    Manufacturer datasheet

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

  • S-LBZX84B6V2LT1GSOT-23Zener diode, 3 pins, LRCZener diodeSOT-233 pinsLRC
    What it is
    Zener diode
    Maker
    LRC
    Package
    SOT-23
    Pins
    3
    Details
    Zener diode, VZ Min 6.06 V, VZ Nom 6.2 V, VZ Max 6.33 V
    Source
    Manufacturer datasheet

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

  • 1 more part has no package on record
    • NCP160BMX275LDO regulator, onsemiLDO regulatorNot recordedNot recordedonsemi
      What it is
      LDO regulator
      Maker
      onsemi
      Package
      Not recorded
      Pins
      Not recorded
      Details
      LDO Regulator for RF and Analog Circuits - Ultra-Low Noise and High PSRR
      Source
      Manufacturer datasheet

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

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.

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.

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.

Schottky diode

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

Working, it reads

About 0.15 to 0.45 V anode to cathode, roughly half a silicon diode, and open the other way.

Dead, it reads

  • The same reading both ways round, near 0 V with a continuous beep or the same middling value: shorted.
  • A reading the wrong way round as well: leaky.
  • Open both ways: failed open.
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 large Schottky can read about 0.1 V forward and beep like a short, and leaks a little the wrong way when good, more when warm. It is shorted only if it reads the same both ways. Measure it cold, beside an identical cold one.

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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