SMD code 5D
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.
13 parts are printed 5D
Not sure which one you have?
Answer up to 4 quick questions and these 13 parts are ranked, with a meter test that settles it. It works on a dead part too.
BAS16SOT-23Switching diode, 3 pins, DiotecSwitching diodeSOT-233 pinsDiotec
- What it is
- Switching diode
- Maker
- Diotec
- Package
- SOT-23
- Pins
- 3
- Details
- Surface-mount fast switching diode
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Silicon diode.
BC807SOT-23PNP transistor, 3 pins, NexperiaPNP transistorSOT-233 pinsNexperia
- What it is
- PNP transistor
- Maker
- Nexperia
- Package
- SOT-23
- Pins
- 3
- Pinout
- 1 base
- 2 emitter
- 3 collector
- Details
- 45 V, 500 mA PNP general-purpose transistor
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: PNP transistor.
BC807WSOT-323PNP transistor, 3 pins, NexperiaPNP transistorSOT-3233 pinsNexperia
- What it is
- PNP transistor
- Maker
- Nexperia
- Package
- SOT-323
- Pins
- 3
- Pinout
- 1 base
- 2 emitter
- 3 collector
- Details
- 45 V, 500 mA PNP general-purpose transistor
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: PNP transistor.
BZD27B5V6PSOD-123FZener diode, 2 pins, VishayZener diodeSOD-123F2 pinsVishay
- What it is
- Zener diode
- Maker
- Vishay
- Package
- SOD-123F
- Pins
- 2
- Details
- 5.6 V Zener diode
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Zener diode.
BZT52C12SOD-123FZener diode, 2 pins, DiotecZener diodeSOD-123F2 pinsDiotec
- What it is
- Zener diode
- Maker
- Diotec
- Package
- SOD-123F
- Pins
- 2
- Details
- SMD Planar Zener Diodes
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Zener diode.
MMBD914SOT-23Switching diode, 3 pins, InfineonSwitching diodeSOT-233 pinsInfineon
- What it is
- Switching diode
- Maker
- Infineon
- Package
- SOT-23
- Pins
- 3
- Details
- Surface-mount fast switching diode
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Silicon diode.
MMBD4148SOT-23Switching diode, 3 pins, Taiwan SemiconductorSwitching diodeSOT-233 pinsTaiwan Semiconductor
- What it is
- Switching diode
- Maker
- Taiwan Semiconductor
- Package
- SOT-23
- Pins
- 3
- Details
- Surface-mount fast switching diode
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Silicon diode.
MMDL914SOD-323Switching diode, 2 pins, JSCJSwitching diodeSOD-3232 pinsJSCJ
- What it is
- Switching diode
- Maker
- JSCJ
- Package
- SOD-323
- Pins
- 2
- Details
- Switching diode, 100 V, 200 mA
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Silicon diode.
MMSD914SOD-123Switching diode, 2 pins, JSCJSwitching diodeSOD-1232 pinsJSCJ
- What it is
- Switching diode
- Maker
- JSCJ
- Package
- SOD-123
- Pins
- 2
- Details
- Switching diode, 100 V, 200 mA
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Silicon diode.
PBSS303NXSOT-89NPN transistor, 3 pins, NexperiaNPN transistorSOT-893 pinsNexperia
- What it is
- NPN transistor
- Maker
- Nexperia
- Package
- SOT-89
- Pins
- 3
- Details
- 30 V, 5.1 A NPN low VCEsat transistor
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: NPN transistor.
PMBD914SOT-23Switching diode, 3 pins, NexperiaSwitching diodeSOT-233 pinsNexperia
- What it is
- Switching diode
- Maker
- Nexperia
- Package
- SOT-23
- Pins
- 3
- Details
- High-speed switching diode
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Silicon diode.
2 more parts have no package on record
SMBD914Switching diode, InfineonSwitching diodeNot recordedNot recordedInfineon
- What it is
- Switching diode
- Maker
- Infineon
- Package
- Not recorded
- Pins
- Not recorded
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Silicon diode.
VESD24E1-HD1ESD protection diode, VishayESD protection diodeNot recordedNot recordedVishay
- What it is
- ESD protection diode
- Maker
- Vishay
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Single-Line Unidirectional ESD-Protection Diode in DFN1006-2A
- Source
- From the manufacturer's datasheet
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.
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.
PNP transistor
Diode range, part lifted or its base leg off the pad.
Working, it reads
Black probe on the base 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.
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.
NPN transistor
Diode range, part lifted or its base leg off the pad.
Working, it reads
Red probe on the base 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.
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 5D
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 5D
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 30 more parts.
Open this in the search to correct a character or try another package.