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WhatSMDSign in

SMD code 2ND in SOT-553

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.

1 part in SOT-553 is printed 2ND

Not sure which one you have?

Answer up to 4 quick questions and these 13 parts are ranked, with a meter test that settles it. It works on a dead part too.

LDO regulator. What differs:

  • TCR2EE285SOT-553ToshibaToshiba
    What it is
    LDO regulator
    Maker
    Toshiba
    Package
    SOT-553
    Pins
    5
    Details
    TCR2EF series TCR2EE series
    Source
    Manufacturer datasheet

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

    Datasheetfor TCR2EE285, opens in a new tab
  • 12 more parts have no package on record. Nothing rules them out, so they stay.
    • AP6213A-32NLNGSAnwell SemiconductorAnwell Semiconductor
      What it is
      LDO regulator
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 3.1V±2%, 300mA, -CE, H-free
      Source
      Published code list

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

    • AP6213A-32NLNGS1Anwell SemiconductorAnwell Semiconductor
      What it is
      LDO regulator
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 3.1V±1%, 300mA, -CE, H-free
      Source
      Published code list

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

    • AP6213A-32NLNGUAnwell SemiconductorAnwell Semiconductor
      What it is
      LDO regulator
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 3.1V±2%, 300mA. -CE, H-free
      Source
      Published code list

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

    • AP6213A-32NLNGU1Anwell SemiconductorAnwell Semiconductor
      What it is
      LDO regulator
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 3.1V±1%, 300mA. -CE, H-free
      Source
      Published code list

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

    • AP6213A-32NLNGWAnwell SemiconductorAnwell Semiconductor
      What it is
      LDO regulator
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 3.1V±2%, 300mA, -CE, H-free
      Source
      Published code list

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

    • AP6213A-32NLNGW1Anwell SemiconductorAnwell Semiconductor
      What it is
      LDO regulator
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 3.1V±1%, 300mA, -CE, H-free
      Source
      Published code list

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

    • AP6213A-32NLNPSAnwell SemiconductorAnwell Semiconductor
      What it is
      LDO regulator
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 3.1V±2%, 300mA, -CE
      Source
      Published code list

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

    • AP6213A-32NLNPS1Anwell SemiconductorAnwell Semiconductor
      What it is
      LDO regulator
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 3.1V±1%, 300mA, -CE
      Source
      Published code list

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

    • AP6213A-32NLNPUAnwell SemiconductorAnwell Semiconductor
      What it is
      LDO regulator
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 3.1V±2%, 300mA. -CE
      Source
      Published code list

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

    • AP6213A-32NLNPU1Anwell SemiconductorAnwell Semiconductor
      What it is
      LDO regulator
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 3.1V±1%, 300mA. -CE
      Source
      Published code list

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

    • AP6213A-32NLNPWAnwell SemiconductorAnwell Semiconductor
      What it is
      LDO regulator
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 3.1V±2%, 300mA, -CE
      Source
      Published code list

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

    • AP6213A-32NLNPW1Anwell SemiconductorAnwell Semiconductor
      What it is
      LDO regulator
      Maker
      Anwell Semiconductor
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Linear voltage regulator IC: LDO, 3.1V±1%, 300mA, -CE
      Source
      Published code list

      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.

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.

Printed with a code easy to misread as 2ND

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 2ND

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

Did you find your part?

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