SMD code 2056
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.
2056 on a chip resistor
205 MΩ
205 MΩ resistor, 1%
205 followed by 6 zeros. Four digits is normally the 1% series.
Check it with a meter
Lift one end and measure across it. A good one reads 205 MΩ within 1%. Measuring it in circuit reads the parallel combination of everything around it, which is almost always lower, never higher: well above 205 MΩ on the board is a fault. Open, or well above 205 MΩ, means it has failed: burnt, cracked or corroded. That does not change what to fit: the marking still says 205 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 (DFN, SMAF, SMB), 2056 is a part code instead. Those parts are listed below.
6 parts are printed 2056
Not sure which one you have?
Answer up to 4 quick questions and these 6 parts are ranked, with a meter test that settles it. It works on a dead part too.
1SMAF2EZ56SMAFZener diode, 2 pins, RectronZener diodeSMAF2 pinsRectron
- What it is
- Zener diode
- Maker
- Rectron
- Package
- SMAF
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
G2056RC1UDFNMotor driver, 8 pins, Global Mixed-mode TechnologyMotor driverDFN8 pinsGlobal Mixed-mode Technology
- What it is
- Motor driver
- Maker
- Global Mixed-mode Technology
- Package
- DFN
- Pins
- 8
- Details
- Low-Voltage H-Bridge Driver
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
RS2056XC6SOT-363Analog switch, 6 pins, RunicAnalog switchSOT-3636 pinsRunic
- What it is
- Analog switch
- Maker
- Runic
- Package
- SOT-363
- Pins
- 6
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
RS2056XHSOT-23-6Analog switch, 6 pins, RunicAnalog switchSOT-23-66 pinsRunic
- What it is
- Analog switch
- Maker
- Runic
- Package
- SOT-23-6
- Pins
- 6
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
WNMD2056-8DFNN-channel MOSFET, WillsemiN-channel MOSFETDFNNot recordedWillsemi
- What it is
- N-channel MOSFET
- Maker
- Willsemi
- Package
- DFN
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: N-channel MOSFET.
1SMB2EZ56SMBZener diode, 2 pins, PanjitZener diodeSMB2 pinsPanjit
- What it is
- Zener diode
- Maker
- Panjit
- Package
- SMB
- Pins
- 2
- Details
- Z-diode: 56V±5%, 2W
- Source
- Published code list
Is it dead? The meter test is below: Zener diode.
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.
Zener diode
Diode range for the forward check, part lifted, red probe on the anode. A bench supply for the Zener voltage.
Working, it reads
About 0.6 to 0.8 V forward and open in reverse on the diode range. Its Zener voltage shows only on a supply: feed it through a resistor that sets about 5 mA, cathode to positive, read quickly, and it should hold near its rated voltage.
Dead, it reads
- The same reading both ways round, near 0 V with a continuous beep or the same middling value: shorted.
- Open both ways, forward too: failed open.
- Holds well off its rated voltage on the supply test: drifted.
- A soft knee, or a voltage that creeps on the supply test: 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 meter's diode range stops at about 2 to 3 V, so almost every Zener reads open in reverse on it, good or bad; a 3 V meter may just show a 2.4 or 2.7 V part. Above about 3 V the meter cannot tell a Zener from a plain diode.
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.
N-channel MOSFET
Diode range, part lifted. Test drain to source first, then short gate to source and test again.
Working, it reads
Red probe on the source, black on the drain: about 0.4 to 0.9 V, the body diode. Open the other way. The gate reads open to both other pins, both ways.
Dead, it reads
- Drain to source the same both ways, near 0 V with a continuous beep, and still so after shorting gate to source: shorted. The classic failure.
- The gate reads low to source or drain: gate shorted. Often all three pins end up shorted together.
- No body diode at all: failed open.
- On the board
- the gate usually has a resistor to the source, so gate to source reads that resistor, which is not a fault. A drain short can be the load. Lift a leg to be sure.
- 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 diode range can charge the gate enough to turn the part on, and then drain to source reads near 0 both ways on a good part. Short gate to source and test again before you condemn it.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Codes that begin with 2056
For a marking with its end worn or burnt off. Each code has a page of its own.
Did you find your part?
Open this in the search to correct a character or try another package.