Skip to content
WhatSMDSign in

SMD code R1309

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.

R1309 on a chip inductor

0.13 µH

0.13 µH inductor

The R stands in for the decimal point, in microhenries: 0.13 µH. SMD power inductors below 10 µH are printed this way. The same marking also reads as 0.13 pF on a capacitor, and nothing in the code says which; the body of the part does.

Other readings of the same characters, most likely first

  • 0.13 pF capacitor

Check it with a meter

Measure it on an LCR meter, out of circuit. A good one reads close to 0.13 µH. An ohmmeter only shows the winding resistance, which is a fraction of an ohm on a good part and says nothing about the value; open circuit means the winding has failed. Shorted turns still read near 0 Ω on an ohmmeter, so only the LCR meter, or an identical part beside it, shows them. A failed reading does not change what to fit: the marking still says 0.13 µH.

On a transistor or diode body (QFN), R1309 is a part code instead. Those parts are listed below.

2 parts are printed R1309

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.

Analog switch, all QFN, all Runic.

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.

Integrated circuit

Voltage with the board powered; ohms from each pin to ground with it off.

Working, it reads

Supply pin at its voltage and the output doing what the datasheet says. Readings between pins depend on the part.

Dead, it reads

  • A pin near 0 Ω to ground or to the supply pin where an identical part does not read that: failed short.
  • Supply present, output stuck: failed, or its load has.
On the board:
A pin shorted to ground on the board can be anything on that net. Lift the pin to be sure.
Compare:
The surest reference is the same IC on a working board, measured pin by pin.
Watch for:
Its protection diodes can read like junctions between pins, even like a transistor. That proves nothing either way.

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.