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SMD code 516C in D2PAK

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 D2PAK is printed 516C

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.

  • S5KP16CD2PAKTVS diode, 3 pins, EIC SemiconductorTVS diode3 pinsEIC Semiconductor
    What it is
    TVS diode
    Maker
    EIC Semiconductor
    Package
    D2PAK
    Pins
    3
    Details
    Transient voltage supressor: Vbr=17.8..21.8V, Vrwm=16V, 176A, 5000W(1ms), Bidir.
    Source
    Published code list

    Is it dead? The meter test is below: TVS or ESD protection diode.

  • 1 more part has no package on record. Nothing rules it out, so it stays.
    • G516A3Y51ULoad switch, 8 pins, Global Mixed-mode TechnologyLoad switch8 pinsGlobal Mixed-mode Technology
      What it is
      Load switch
      Maker
      Global Mixed-mode Technology
      Package
      Not recorded
      Pins
      8
      Details
      High-Voltage Protection Power Delivery Switch
      Source
      Manufacturer datasheet

      Is it dead? The meter test is below: Load switch.

      Datasheetfor G516A3Y51U, 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.

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.

Load switch

Voltage, board powered, black probe on ground.

Working, it reads

Switched on, the output pin sits at the input voltage. Switched off, it sits near 0 V.

Dead, it reads

  • Output at the input voltage while switched off: the pass element has shorted.
  • Input present and switched on, no output: failed open, or shut down into a shorted load. Power off and measure output to ground.
On the board:
An output near 0 Ω to ground is usually the load. Lift the output pin to see which.
Compare:
If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
Watch for:
The pinout and whether the enable is active high or low differ between parts. The datasheet gives both.

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 516C

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

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