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SMD code 2L100

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.

2L100 is a capacitor marking

10 pF, 550 V

10 pF capacitor, 550 V

10 followed by the multiplier 0, in picofarads: 10 pF. Printed this way on film and larger ceramic capacitors; small chip ceramics are usually not printed at all. 2L is the rated-voltage code for 550 V. Makers differ on 2L: 550 V in Nichicon's numbering, 800 V in Deki Electronics' film-capacitor numbering, so the datasheet settles it.

Check it with a meter

Lift one end and measure it on a capacitance range. A good one reads close to 10 pF. In circuit the meter also sees everything connected across it, so the reading means little until it is out. A failed one usually reads near 0 Ω, or a steady low resistance, on the ohms range, often from a crack. On the board a shorted capacitor shorts its whole rail. A failed reading does not change what to fit: the marking still says 10 pF, 550 V. Fit the same capacitance at the same or a higher voltage.

On a transistor or diode body, 2L100 is a part code instead. Those parts are listed below.

2 parts are printed 2L100

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.

Schottky diode, all Formosa Microsemi.

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.

Did you find your part?

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