SMD code 5R183
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.
5R183 on a chip inductor
5.18 µH
5.18 µH inductor
The R stands in for the decimal point, in microhenries: 5.18 µH. SMD power inductors below 10 µH are printed this way. The same marking also reads as 5.18 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
- 5.18 pF capacitor
Check it with a meter
Measure it on an LCR meter, out of circuit. A good one reads close to 5.18 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 5.18 µH.
On a transistor or diode body, 5R183 is a part code instead. Those parts are listed below.
The only part printed 5R183 in our tables
AVA-5R183+
- What it is
- RF amplifier (MMIC)
- Maker
- Mini-Circuits
- Package
- Not recorded
- Pins
- Not recorded
- Details
- MMIC amplifier, 0.5-18 GHz
- Source
- Manufacturer datasheet
Is it dead?
Voltage, board powered, on the output pin that the bias resistor or choke feeds.
Working, it reads
The output pin sits at the device voltage the datasheet gives, a few volts, below the supply.
Dead, it reads
- Output pin at 0 V, or near 0 Ω to ground with the power off: shorted inside.
- Output pin at the full supply voltage: open inside, no current flowing.
- On the board:
- Measured on the board with power on; the bias network is part of the reading.
- 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 figures depend on the part and its bias resistor. 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.
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