SMD code 58D
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.
58D on a chip resistor
392 kΩ
392 kΩ resistor, 1%
EIA-96 precision code: 58 stands for 392 in the E96 table, and the letter D is the multiplier, × 1 000. These are 1% parts.
Check it with a meter
Lift one end and measure across it. A good one reads 392 kΩ within 1%. Measuring it in circuit reads the parallel combination of everything around it, which is almost always lower, never higher: well above 392 kΩ on the board is a fault. Open, or well above 392 kΩ, means it has failed: burnt, cracked or corroded. That does not change what to fit: the marking still says 392 kΩ. 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 (SOT-23, SOT-23-5, SMC), 58D is a part code instead. Those parts are listed below.
5 parts are printed 58D
Not sure which one you have?
Answer up to 4 quick questions and these 5 parts are ranked, with a meter test that settles it. It works on a dead part too.
2 pins. What differs:
ESDHP3Z5.0CSOD-323ESD protection diode, Formosa MicrosemiESD protection diodeSOD-323Formosa Microsemi
- What it is
- ESD protection diode
- Maker
- Formosa Microsemi
- Package
- SOD-323
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SD0581D3WSOD-323ESD protection diode, LeiditechESD protection diodeSOD-323Leiditech
- What it is
- ESD protection diode
- Maker
- Leiditech
- Package
- SOD-323
- Pins
- 2
- Details
- ESD protection diode, VRWM 5 V, Cj 300 pF
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
P4SMAFJ58CASMAFTVS diode, Dongguan You Feng Wei ElectronicsTVS diodeSMAFDongguan You Feng Wei Electronics
- What it is
- TVS diode
- Maker
- Dongguan You Feng Wei Electronics
- Package
- SMAF
- Pins
- 2
- Details
- Transient voltage supressor: Vrwm=58V, Vbr=64.4..74.1V, Ipp=4.3A, 400W(1ms), Bidir.
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
P4SMAJ58CASMAYeashinNot recordedSMAYeashin
- What it is
- Not recorded
- Maker
- Yeashin
- Package
- SMA
- Pins
- 2
- Details
- TVS: 58V, 4.3A, 400W(1ms), Bidirectional
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
P4SMFJ58CASOD-123FTVS diode, YeashinTVS diodeSOD-123FYeashin
- What it is
- TVS diode
- Maker
- Yeashin
- Package
- SOD-123F
- Pins
- 2
- Details
- Transient voltage supressor: Vrwm=58V, Ipp=4.3A, 400W (1ms), Bidir.
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection 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.
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.
Printed with a code easy to misread as 58D
One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.
Codes not listed here are printed on 7 more parts.
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