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SMD code H13 in SOD-123F

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.

4 parts in SOD-123F are printed H13

Not sure which one you have?

Answer up to 4 quick questions and these 8 parts are ranked, with a meter test that settles it. It works on a dead part too.

  • MBRX130HSOD-123FSchottky diode, Galaxy MicroelectronicsSchottky diodeGalaxy Microelectronics
    What it is
    Schottky diode
    Maker
    Galaxy Microelectronics
    Package
    SOD-123F
    Pins
    2
    Details
    1A, 30V, Surface Mount Schottky Barrier Rectifiers
    Source
    Manufacturer datasheet

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

  • MBRXFH130SOD-123FSchottky diode, Galaxy MicroelectronicsSchottky diodeGalaxy Microelectronics
    What it is
    Schottky diode
    Maker
    Galaxy Microelectronics
    Package
    SOD-123F
    Pins
    2
    Details
    1A, 30V, Surface Mount Schottky Barrier Rectifiers
    Source
    Manufacturer datasheet

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

  • TMBRX130HSOD-123FSchottky diode, Galaxy MicroelectronicsSchottky diodeGalaxy Microelectronics
    What it is
    Schottky diode
    Maker
    Galaxy Microelectronics
    Package
    SOD-123F
    Pins
    2
    Details
    1A, 30V, Surface Mount Schottky Barrier Rectifiers
    Source
    Manufacturer datasheet

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

  • TMBRXFH130SOD-123FSchottky diode, Galaxy MicroelectronicsSchottky diodeGalaxy Microelectronics
    What it is
    Schottky diode
    Maker
    Galaxy Microelectronics
    Package
    SOD-123F
    Pins
    2
    Details
    1A, 30V, Surface Mount Schottky Barrier Rectifiers
    Source
    Manufacturer datasheet

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

  • 4 more parts have no package on record. Nothing rules them out, so they stay.
    • HFM103-LRectifier, Formosa MicrosemiRectifierFormosa Microsemi
      What it is
      Rectifier
      Maker
      Formosa Microsemi
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Rectifier diode
      Source
      Manufacturer datasheet

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

    • HFM103-SFRectifier, Formosa MicrosemiRectifierFormosa Microsemi
      What it is
      Rectifier
      Maker
      Formosa Microsemi
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Rectifier diode
      Source
      Manufacturer datasheet

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

    • HFM103-SF-Q1Rectifier, Formosa MicrosemiRectifierFormosa Microsemi
      What it is
      Rectifier
      Maker
      Formosa Microsemi
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Rectifier diode
      Source
      Manufacturer datasheet

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

    • HSM13SPTRectifier, Chenmko EnterpriseRectifierChenmko Enterprise
      What it is
      Rectifier
      Maker
      Chenmko Enterprise
      Package
      Not recorded
      Pins
      Not recorded
      Details
      Diode: Rectifier, U-fast, 200V, 1A
      Source
      Published code list

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

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.

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.

Printed with a code easy to misread as H13

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 H13

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

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