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SMD code 858

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.

858 on a chip capacitor

0.85 pF

0.85 pF capacitor

85 followed by the multiplier 8, in picofarads: 0.85 pF. Printed this way on film and larger ceramic capacitors; small chip ceramics are usually not printed at all.

Check it with a meter

Lift one end and measure it on a capacitance range. A good one reads close to 0.85 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 0.85 pF.

On a transistor or diode body (SMA, SOT-23-5, DFN), 858 is a part code instead. Those parts are listed below.

10 parts are printed 858

Not sure which one you have?

Answer up to 4 quick questions and these 10 parts are ranked, with a meter test that settles it. It works on a dead part too.

  • IXD1701D39FRSOT-223IXYSNot recordedSOT-223Not recordedIXYS
    What it is
    Not recorded
    Maker
    IXYS
    Package
    SOT-223
    Pins
    Not recorded
    Details
    Linear voltage regulator IC: 3.9V±2%, 150mA
    Source
    Published code list

    Is it dead? The meter test is below: Voltage regulator.

  • IXD1701D39JRDPAK3 pins, IXYSNot recordedDPAK3 pinsIXYS
    What it is
    Not recorded
    Maker
    IXYS
    Package
    DPAK
    Pins
    3
    Details
    Linear voltage regulator IC: 3.9V±2%, 150mA
    Source
    Published code list

    Is it dead? The meter test is below: Voltage regulator.

  • IXD1701D39PRSOT-893 pins, IXYSNot recordedSOT-893 pinsIXYS
    What it is
    Not recorded
    Maker
    IXYS
    Package
    SOT-89
    Pins
    3
    Details
    Linear voltage regulator IC: 3.9V±2%, 150mA
    Source
    Published code list

    Is it dead? The meter test is below: Voltage regulator.

  • IXD2111F581MRSOT-23-5DC-DC converter, 5 pins, IXYSDC-DC converterSOT-23-55 pinsIXYS
    What it is
    DC-DC converter
    Maker
    IXYS
    Package
    SOT-23-5
    Pins
    5
    Details
    DC/DC voltage converter IC: PFM st-up, 100kHz, 5.8V±2.5%, 400mA
    Source
    Published code list

    Is it dead? The meter test is below: Integrated circuit.

  • S858TA1SOT-143RF amplifier (MMIC), 4 pins, VishayRF amplifier (MMIC)SOT-1434 pinsVishay
    What it is
    RF amplifier (MMIC)
    Maker
    Vishay
    Package
    SOT-143
    Pins
    4
    Details
    Monolithic microwave IC: UHF-Amplifier, 5V, Pq=5dBm(550MHz)
    Source
    Published code list

    Is it dead? The meter test is below: RF amplifier.

  • XC6112A639MRSOT-23-5Voltage supervisor, 5 pins, TorexVoltage supervisorSOT-23-55 pinsTorex
    What it is
    Voltage supervisor
    Maker
    Torex
    Package
    SOT-23-5
    Pins
    5
    Details
    CMOS-IC: VDet 3.9V, -MR, -Reset ODO, Wt=1.6s, Rt=3.13ms
    Source
    Published code list

    Is it dead? The meter test is below: Integrated circuit.

  • XC6701D39FRSOT-223TorexNot recordedSOT-223Not recordedTorex
    What it is
    Not recorded
    Maker
    Torex
    Package
    SOT-223
    Pins
    Not recorded
    Details
    Linear voltage regulator IC: 3.9V±2%, 150mA
    Source
    Published code list

    Is it dead? The meter test is below: Voltage regulator.

  • XC6701D39JRDPAK3 pins, TorexNot recordedDPAK3 pinsTorex
    What it is
    Not recorded
    Maker
    Torex
    Package
    DPAK
    Pins
    3
    Details
    Linear voltage regulator IC: 3.9V±2%, 150mA
    Source
    Published code list

    Is it dead? The meter test is below: Voltage regulator.

  • XC6701D39PRSOT-893 pins, TorexNot recordedSOT-893 pinsTorex
    What it is
    Not recorded
    Maker
    Torex
    Package
    SOT-89
    Pins
    3
    Details
    Linear voltage regulator IC: 3.9V±2%, 150mA
    Source
    Published code list

    Is it dead? The meter test is below: Voltage regulator.

  • XC9111F581MRSOT-23-5DC-DC converter, 5 pins, TorexDC-DC converterSOT-23-55 pinsTorex
    What it is
    DC-DC converter
    Maker
    Torex
    Package
    SOT-23-5
    Pins
    5
    Details
    DC/DC voltage converter IC: PFM st-up, 100kHz, 5.8V±2.5%, 400mA
    Source
    Published code list

    Is it dead? The meter test is below: Integrated circuit.

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.

Voltage regulator

Voltage, board powered, black probe on ground. Then ohms with the power off.

Working, it reads

Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.

Dead, it reads

  • Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
  • Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
  • Power off, input to output near 0 Ω: shorted.
On the board:
An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
Compare:
The same regulator on another rail or another board shows the right voltages and the right resistances.
Watch for:
Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.

A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.

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.

RF amplifier

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.

Printed with a code easy to misread as 858

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 858

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

Codes not listed here are printed on 26 more parts.

Did you find your part?

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