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SMD code H1J 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.

1 part in SOD-123F is printed H1J

Not sure which one you have?

Answer up to 4 quick questions and these 2 parts are ranked, with a meter test that settles it. It works on a dead part too.

Rectifier. What differs:

  • GSH1JSOD-123FGood-ArkGood-Ark
    What it is
    Rectifier
    Maker
    Good-Ark
    Package
    SOD-123F
    Pins
    2
    Details
    Rectifier, 600 V, 1 A
    Source
    Manufacturer datasheet

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

    Datasheetfor GSH1J, opens in a new tab
  • 1 more part has no package on record. Nothing rules it out, so it stays.
    • H10JHEGalaxy MicroelectronicsGalaxy Microelectronics
      What it is
      Rectifier
      Maker
      Galaxy Microelectronics
      Package
      Not recorded
      Pins
      Not recorded
      Details
      1A, 600V, 25ns, Surface Mount Fast Recovery Rectifiers
      Source
      Manufacturer datasheet

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

      Datasheetfor H10JHE, opens in a new tab

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.

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.

Codes that begin with H1J

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 14 more parts.

Did you find your part?

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