SMD code 85A
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.
85A on a chip resistor
750 Ω
750 Ω resistor, 1%
EIA-96 precision code: 85 selects 7.5 from the E96 series and A multiplies by 100. These are 1% parts.
Check it with a meter
Lift one end and measure across it. A good one reads 750 Ω within 1%. Measuring it in circuit reads the parallel combination of everything around it, which is almost always lower, never higher: well above 750 Ω on the board is a fault. Open, or well above 750 Ω, means it has failed: burnt, cracked or corroded. That does not change what to fit: the marking still says 750 Ω. 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 (SOD-123F, SOT-23-5, DFN), 85A is a part code instead. Those parts are listed below.
25 parts are printed 85A
Not sure which one you have?
Answer up to 4 quick questions and these 25 parts are ranked, with a meter test that settles it. It works on a dead part too.
GSF2TVS85ASOD-123FTVS diode, 2 pins, Good-ArkTVS diodeSOD-123F2 pinsGood-Ark
- What it is
- TVS diode
- Maker
- Good-Ark
- Package
- SOD-123F
- Pins
- 2
- Details
- TVS diode, 200 W
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SFL2J85A-CSOD-123FTVS diode, 2 pins, SeCoSTVS diodeSOD-123F2 pinsSeCoS
- What it is
- TVS diode
- Maker
- SeCoS
- Package
- SOD-123F
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SM4F85ASOD-123FTVS diode, 2 pins, YFWTVS diodeSOD-123F2 pinsYFW
- What it is
- TVS diode
- Maker
- YFW
- Package
- SOD-123F
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SMB15J85A-HFSMBTVS diode, 2 pins, ComchipTVS diodeSMB2 pinsComchip
- What it is
- TVS diode
- Maker
- Comchip
- Package
- SMB
- Pins
- 2
- Details
- 85 V 1500 W unidirectional TVS diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
SMF85ASOD-123FTVS diode, 2 pins, Good-ArkTVS diodeSOD-123F2 pinsGood-Ark
- What it is
- TVS diode
- Maker
- Good-Ark
- Package
- SOD-123F
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
1SMC85ASMCTVS diode, 2 pins, EIC SemiconductorTVS diodeSMC2 pinsEIC Semiconductor
- What it is
- TVS diode
- Maker
- EIC Semiconductor
- Package
- SMC
- Pins
- 2
- Details
- TVS: 85V, 10.4A, 1500W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
IXD1701D41FRSOT-223IXYSNot recordedSOT-223Not recordedIXYS
- What it is
- Not recorded
- Maker
- IXYS
- Package
- SOT-223
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: 4.1V±2%, 150mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
IXD1701D41JRDPAK3 pins, IXYSNot recordedDPAK3 pinsIXYS
- What it is
- Not recorded
- Maker
- IXYS
- Package
- DPAK
- Pins
- 3
- Details
- Linear voltage regulator IC: 4.1V±2%, 150mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
IXD1701D41PRSOT-893 pins, IXYSNot recordedSOT-893 pinsIXYS
- What it is
- Not recorded
- Maker
- IXYS
- Package
- SOT-89
- Pins
- 3
- Details
- Linear voltage regulator IC: 4.1V±2%, 150mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
MMBD1701ASOT-233 pins, Fairchild SemiconductorNot recordedSOT-233 pinsFairchild Semiconductor
- What it is
- Not recorded
- Maker
- Fairchild Semiconductor
- Package
- SOT-23
- Pins
- 3
- Details
- Diode
- Source
- Published code list
Is it dead? The meter test is below: Silicon diode.
MMF85ASOD-123FTVS diode, 2 pins, Shanghai SemitechTVS diodeSOD-123F2 pinsShanghai Semitech
- What it is
- TVS diode
- Maker
- Shanghai Semitech
- Package
- SOD-123F
- Pins
- 2
- Details
- Transient voltage supressor: Vrwm=85V, Vbr=94.4..108.2V, Ipp=1.3A, 200W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
P4SMAFJ85ASMAFTVS diode, 2 pins, Dongguan You Feng Wei ElectronicsTVS diodeSMAF2 pinsDongguan You Feng Wei Electronics
- What it is
- TVS diode
- Maker
- Dongguan You Feng Wei Electronics
- Package
- SMAF
- Pins
- 2
- Details
- TVS diode, unidirectional
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
P4SMAJ85ASMATVS diode, 2 pins, YeashinTVS diodeSMA2 pinsYeashin
- What it is
- TVS diode
- Maker
- Yeashin
- Package
- SMA
- Pins
- 2
- Details
- TVS: 85V, 2.9A, 400W (1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
2 more parts have no package on record
SM15KWE85ATVS diode, ProTek DevicesTVS diodeNot recordedNot recordedProTek Devices
- What it is
- TVS diode
- Maker
- ProTek Devices
- Package
- Not recorded
- Pins
- Not recorded
- Details
- 15 Kilowatt TVS Components
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
3PMT85ATVS diode, Microsemi Integrated Products DivisionTVS diodeNot recordedNot recordedMicrosemi Integrated Products Division
- What it is
- TVS diode
- Maker
- Microsemi Integrated Products Division
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Transient voltage supressor: Vvm=85V, Vbr=94.4V, Vcl=137V, 10.4A, 1500W(1ms)
- 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.
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.
Silicon diode
Diode range, part lifted or one leg off the pad. Red probe on the anode.
Working, it reads
About 0.5 to 0.8 V anode to cathode, and open the other way. Small switching diodes read about 0.6 to 0.7 V; large rectifiers can read a little lower.
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: failed open.
- A reading the wrong way round as well: 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 three-pin body can hold two diodes. With a common pin they read two junctions from that pin, just like a transistor; in series they read two drops end to end. Test each pair the datasheet names.
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 85A
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 4 more parts.
Did you find your part?
Open this in the search to correct a character or try another package.