SMD code 05F
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.
05F on a chip resistor
11 MΩ
11 MΩ resistor, 1%
EIA-96 precision code: 05 stands for 110 in the E96 table, and the letter F is the multiplier, × 100 000. These are 1% parts.
Check it with a meter
Lift one end and measure across it. A good one reads 11 MΩ within 1%. Measuring it in circuit reads the parallel combination of everything around it, which is almost always lower, never higher: well above 11 MΩ on the board is a fault. Open, or well above 11 MΩ, means it has failed: burnt, cracked or corroded. That does not change what to fit: the marking still says 11 MΩ. 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, SOT-23-5, SOT-23), 05F is a part code instead. Those parts are listed below.
18 parts are printed 05F
Not sure which one you have?
Answer up to 4 quick questions and these 18 parts are ranked, with a meter test that settles it. It works on a dead part too.
CH400DGPSOT-23Schottky diode, 3 pins, ChenmkoSchottky diodeSOT-233 pinsChenmko
- What it is
- Schottky diode
- Maker
- Chenmko
- Package
- SOT-23
- Pins
- 3
- Details
- SCHOTTKY BARRIER DIODE, 40 V, 0.5 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
GALI-5F+SOT-89RF amplifier (MMIC), 3 pins, Mini-CircuitsRF amplifier (MMIC)SOT-893 pinsMini-Circuits
- What it is
- RF amplifier (MMIC)
- Maker
- Mini-Circuits
- Package
- SOT-89
- Pins
- 3
- Details
- MMIC amplifier, DC-4 GHz
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: RF amplifier.
JEU05MFSOT-353TVS diode, 5 pins, JieJieTVS diodeSOT-3535 pinsJieJie
- What it is
- TVS diode
- Maker
- JieJie
- Package
- SOT-353
- Pins
- 5
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
N405AT35SOT-353ESD protection diode, 5 pins, Formosa MicrosemiESD protection diodeSOT-3535 pinsFormosa Microsemi
- What it is
- ESD protection diode
- Maker
- Formosa Microsemi
- Package
- SOT-353
- Pins
- 5
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SCS400D-CSOT-23Schottky diode, 3 pins, SeCoSSchottky diodeSOT-233 pinsSeCoS
- What it is
- Schottky diode
- Maker
- SeCoS
- Package
- SOT-23
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
SCS400SDFSOT-323Schottky diode, 3 pins, SeCoSSchottky diodeSOT-3233 pinsSeCoS
- What it is
- Schottky diode
- Maker
- SeCoS
- Package
- SOT-323
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
STF701SOT-353ESD protection diode, 5 pins, ProTek DevicesESD protection diodeSOT-3535 pinsProTek Devices
- What it is
- ESD protection diode
- Maker
- ProTek Devices
- Package
- SOT-353
- Pins
- 5
- Details
- EMI/Filter TVS Array
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
WS05MFSOT-353ESD protection diode, 5 pins, WayonESD protection diodeSOT-3535 pinsWayon
- What it is
- ESD protection diode
- Maker
- Wayon
- Package
- SOT-353
- Pins
- 5
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
CH400DPTSOT-23Schottky diode, 3 pins, Chenmko EnterpriseSchottky diodeSOT-233 pinsChenmko Enterprise
- What it is
- Schottky diode
- Maker
- Chenmko Enterprise
- Package
- SOT-23
- Pins
- 3
- Details
- Diode: SBR, 40V, 500mA, Vf<0.55V(500mA)
- Source
- Published code list
Is it dead? The meter test is below: Schottky diode.
Gali-5FSOT-89RF amplifier (MMIC), 3 pins, Mini-CircuitsRF amplifier (MMIC)SOT-893 pinsMini-Circuits
- What it is
- RF amplifier (MMIC)
- Maker
- Mini-Circuits
- Package
- SOT-89
- Pins
- 3
- Details
- Lin-IC: RF amplifier, DC..4GHz, 15,1dB (50Ω)
- Source
- Published code list
Is it dead? The meter test is below: RF amplifier.
RB400DSOT-23Schottky diode, 3 pins, MCCSchottky diodeSOT-233 pinsMCC
- What it is
- Schottky diode
- Maker
- MCC
- Package
- SOT-23
- Pins
- 3
- Details
- Schottky diode, 40 V, 0.5 A
- Source
- Published code list
Is it dead? The meter test is below: Schottky diode.
TSDF1205RSOT-143RF transistor, 4 pinsRF transistorSOT-1434 pinsNot recorded
- What it is
- RF transistor
- Maker
- Not recorded
- Package
- SOT-143
- Pins
- 4
- Details
- fT12GHz npn 4V 12mA
- Source
- Published code list
Is it dead? The meter test is below: Bipolar transistor.
XC6101A616MRSOT-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 1.6V, 5%, Hst, -MR, -Reset PPO, Wt=1.6s, Rt=3.13ms
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
2 more parts have no package on record
N05UT1006GESD protection diode, Formosa MicrosemiESD protection diodeNot recordedNot recordedFormosa Microsemi
- What it is
- ESD protection diode
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SGM66099C-ADJYTDI6GDC-DC converter, 6 pins, SG MicroDC-DC converterNot recorded6 pinsSG Micro
- What it is
- DC-DC converter
- Maker
- SG Micro
- Package
- Not recorded
- Pins
- 6
- Details
- Synchronous Boost Converter with Ultra-Low Quiescent Current
- Source
- Manufacturer datasheet
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.
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.
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.
TVS or ESD protection diode
Diode range, from the protected line to ground, part lifted if you can.
Working, it reads
A one-way part reads about 0.6 to 0.8 V forward and open in reverse. A two-way part reads open both ways. Arrays with several lines read as the datasheet's diagram draws them.
Dead, it reads
- From the line to ground, the same reading both ways, near 0 V with a continuous beep: shorted.
- A reading both ways on a one-way part: leaky.
- A one-way part open both ways: failed open.
- On the board
- , a line reading shorted to ground can be this part or anything else on that line. Lift it: if the short goes with it, it has failed.
- Compare:
- The same part on the next line or connector pin is the healthy reading to compare with.
- Watch for:
- A two-way part reads open both ways when it is good, exactly like one that has failed open. The meter cannot tell them apart; an identical part on the next line can.
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.
Bipolar transistor
Diode range, part lifted or its base leg off the pad.
Working, it reads
From the base, one probe colour reads about 0.6 to 0.75 V to the emitter and to the collector, and open the other way round. Collector to emitter reads open both ways.
Dead, it reads
- Collector to emitter the same both ways, near 0 V with a continuous beep: shorted. The commonest failure.
- The base the same both ways to another pin, near 0 V or a middling value: a shorted junction.
- Only one junction reads, or none: a junction has failed open. It then looks like a diode.
- A reading the wrong way round, where it should be open: 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 pair of diodes with a common pin reads just like a transistor, and some transistors carry a built-in diode or resistor. The datasheet says which.
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 05F
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 05F
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 18 more parts.
Did you find your part?
Open this in the search to correct a character or try another package.