Skip to content
WhatSMDSign in

SMD code 1002

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.

1002 on a chip resistor

10 kΩ

10 kΩ resistor, 1%

100 followed by 2 zeros. Four digits is normally the 1% series.

Check it with a meter

Lift one end and measure across it. A good one reads 10 kΩ within 1%. Measuring it in circuit reads the parallel combination of everything around it, which is almost always lower, never higher: well above 10 kΩ on the board is a fault. Open, or well above 10 kΩ, means it has failed: burnt, cracked or corroded. That does not change what to fit: the marking still says 10 kΩ. A burnt resistor usually means the part it feeds drew too much, so find that before fitting a new one.

On a transistor or diode body (USP-6B, SMA, SMB), 1002 is a part code instead. Those parts are listed below.

4 parts are printed 1002

Not sure which one you have?

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

  • GRS1002FHSOD-123FRectifier, 2 pins, Good-ArkRectifierSOD-123F2 pinsGood-Ark
    What it is
    Rectifier
    Maker
    Good-Ark
    Package
    SOD-123F
    Pins
    2
    Details
    Rectifier, 200 V, 1 A
    Source
    Manufacturer datasheet

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

    Datasheetfor GRS1002FH, opens in a new tab
  • L02N10ASOT-23N-channel MOSFET, 3 pins, Yangjie Electronic TechN-channel MOSFETSOT-233 pinsYangjie Electronic Tech
    What it is
    N-channel MOSFET
    Maker
    Yangjie Electronic Tech
    Package
    SOT-23
    Pins
    3
    Source
    Manufacturer datasheet

    Is it dead? The meter test is below: N-channel MOSFET.

    Datasheetfor L02N10A, opens in a new tab
  • 2 more parts have no package on record
    • LM02N10AN-channel MOSFET, LeiditechN-channel MOSFETNot recordedNot recordedLeiditech
      What it is
      N-channel MOSFET
      Maker
      Leiditech
      Package
      Not recorded
      Pins
      Not recorded
      Details
      N-channel MOSFET, 100 V, 2 A
      Source
      Manufacturer datasheet

      Is it dead? The meter test is below: N-channel MOSFET.

      Datasheetfor LM02N10A, opens in a new tab
    • LM6003N-channel MOSFET, LeiditechN-channel MOSFETNot recordedNot recordedLeiditech
      What it is
      N-channel MOSFET
      Maker
      Leiditech
      Package
      Not recorded
      Pins
      Not recorded
      Details
      N-channel MOSFET, 100 V, 3 A
      Source
      Manufacturer datasheet

      Is it dead? The meter test is below: N-channel MOSFET.

      Datasheetfor LM6003, 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.

N-channel MOSFET

Diode range, part lifted. Test drain to source first, then short gate to source and test again.

Working, it reads

Red probe on the source, black on the drain: about 0.4 to 0.9 V, the body diode. Open the other way. The gate reads open to both other pins, both ways.

Dead, it reads

  • Drain to source the same both ways, near 0 V with a continuous beep, and still so after shorting gate to source: shorted. The classic failure.
  • The gate reads low to source or drain: gate shorted. Often all three pins end up shorted together.
  • No body diode at all: failed open.
On the board
the gate usually has a resistor to the source, so gate to source reads that resistor, which is not a fault. A drain short can be the load. Lift a leg to be sure.
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 diode range can charge the gate enough to turn the part on, and then drain to source reads near 0 both ways on a good part. Short gate to source and test again before you condemn it.

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 1002

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 1002

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

Did you find your part?

Open this in the search to correct a character or try another package.