SMD code 5De
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.
The last letter, e, is lower case, which on NXP and Philips parts is a date or factory code, so it was set aside and 5D was searched.
144 parts are printed 5De
Not sure which one you have?
Answer up to 4 quick questions and these 50 parts are ranked, with a meter test that settles it. It works on a dead part too.
1N4148WSSOD-323Switching diode, 2 pins, Formosa MicrosemiSwitching diodeSOD-3232 pinsFormosa Microsemi
- What it is
- Switching diode
- Maker
- Formosa Microsemi
- Package
- SOD-323
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
1N4148WS-Q1SOD-323Switching diode, 2 pins, Formosa MicrosemiSwitching diodeSOD-3232 pinsFormosa Microsemi
- What it is
- Switching diode
- Maker
- Formosa Microsemi
- Package
- SOD-323
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
1SS193SOT-23Switching diode, 3 pins, YFWSwitching diodeSOT-233 pinsYFW
- What it is
- Switching diode
- Maker
- YFW
- Package
- SOT-23
- Pins
- 3
- Details
- Switching diode, 80 V, 100 mA
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
1SS355SOD-323Switching diode, 2 pins, Formosa MicrosemiSwitching diodeSOD-3232 pinsFormosa Microsemi
- What it is
- Switching diode
- Maker
- Formosa Microsemi
- Package
- SOD-323
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
1SS355GPSOD-323Switching diode, 2 pins, ChenmkoSwitching diodeSOD-3232 pinsChenmko
- What it is
- Switching diode
- Maker
- Chenmko
- Package
- SOD-323
- Pins
- 2
- Details
- SWITCHING DIODE, 90 V, 0.1 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
BAS16SOT-23Switching diode, 3 pins, DiotecSwitching diodeSOT-233 pinsDiotec
- What it is
- Switching diode
- Maker
- Diotec
- Package
- SOT-23
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
BAS16-Q1SOT-23Switching diode, 3 pins, Formosa MicrosemiSwitching diodeSOT-233 pinsFormosa Microsemi
- What it is
- Switching diode
- Maker
- Formosa Microsemi
- Package
- SOT-23
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Silicon diode.
BAV16WSSOD-323Switching diode, 2 pins, Formosa MicrosemiSwitching diodeSOD-3232 pinsFormosa Microsemi
- What it is
- Switching diode
- Maker
- Formosa Microsemi
- Package
- SOD-323
- Pins
- 2
- Details
- Surface-mount fast switching diode
- Source
- Manufacturer 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
- PNP bipolar transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
BC807-16SOT-23PNP transistor, 3 pins, Taitron ComponentsPNP transistorSOT-233 pinsTaitron Components
- What it is
- PNP transistor
- Maker
- Taitron Components
- Package
- SOT-23
- Pins
- 3
- Details
- -45 V, -500 mA PNP small-signal transistor, gain group 16
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
BC807-25SOT-23PNP transistor, 3 pins, Taitron ComponentsPNP transistorSOT-233 pinsTaitron Components
- What it is
- PNP transistor
- Maker
- Taitron Components
- Package
- SOT-23
- Pins
- 3
- Details
- -45 V, -500 mA PNP small-signal transistor, gain group 25
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
BC807-40SOT-23PNP transistor, 3 pins, Taitron ComponentsPNP transistorSOT-233 pinsTaitron Components
- What it is
- PNP transistor
- Maker
- Taitron Components
- Package
- SOT-23
- Pins
- 3
- Details
- -45 V, -500 mA PNP small-signal transistor, gain group 40
- Source
- Manufacturer 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
- PNP bipolar transistor
- Source
- Manufacturer 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
- Manufacturer 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
- Source
- Manufacturer datasheet
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.
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.
Printed with a code easy to misread as 5De
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 21 more parts.
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