SMD code 5Bs
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, s, is lower case, which on NXP and Philips parts is a date or factory code, so it was set aside and 5B was searched.
134 parts are printed 5Bs
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.
PBSS301NXSOT-89NPN transistor, 3 pins, NexperiaNPN transistorSOT-893 pinsNexperia
- What it is
- NPN transistor
- Maker
- Nexperia
- Package
- SOT-89
- Pins
- 3
- Details
- 12 V, 5.3 A NPN low VCEsat (BISS) transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: NPN transistor.
PESDNC3FD5VBSOT-883ESD protection diode, 3 pins, PrisemiESD protection diodeSOT-8833 pinsPrisemi
- What it is
- ESD protection diode
- Maker
- Prisemi
- Package
- SOT-883
- Pins
- 3
- Details
- ESD protection diode, 5 V working
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
PESDUC5D5VBSOD-523ESD protection diode, 2 pins, UMWESD protection diodeSOD-5232 pinsUMW
- What it is
- ESD protection diode
- Maker
- UMW
- Package
- SOD-523
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
PJSD05CTSSOD-523ESD protection diode, 2 pins, UMWESD protection diodeSOD-5232 pinsUMW
- What it is
- ESD protection diode
- Maker
- UMW
- Package
- SOD-523
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
PSLC05CSOT-143ESD protection diode, 4 pins, ProTek DevicesESD protection diodeSOT-1434 pinsProTek Devices
- What it is
- ESD protection diode
- Maker
- ProTek Devices
- Package
- SOT-143
- Pins
- 4
- Details
- 350 Watt Low Capacitance TVS Array
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
S-LBC807-25WT1GSOT-323PNP transistor, 3 pins, LRCPNP transistorSOT-3233 pinsLRC
- What it is
- PNP transistor
- Maker
- LRC
- Package
- SOT-323
- Pins
- 3
- Details
- Bipolar transistor, PNP, IC 500 mA, VCEO 45 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
SBC807-25WSOT-323PNP transistor, 3 pins, onsemiPNP transistorSOT-3233 pinsonsemi
- What it is
- PNP transistor
- Maker
- onsemi
- Package
- SOT-323
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
TBC807-25SOT-23PNP transistor, 3 pins, Galaxy MicroelectronicsPNP transistorSOT-233 pinsGalaxy Microelectronics
- What it is
- PNP transistor
- Maker
- Galaxy Microelectronics
- Package
- SOT-23
- Pins
- 3
- Details
- 45V, 0.5A, General Purpose PNP Bipolar Transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
TBC807-25-6LSOT-23-6PNP transistor, 6 pins, Galaxy MicroelectronicsPNP transistorSOT-23-66 pinsGalaxy Microelectronics
- What it is
- PNP transistor
- Maker
- Galaxy Microelectronics
- Package
- SOT-23-6
- Pins
- 6
- Details
- 45V, 0.5A, General Purpose PNP Bipolar Transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
TBC807-25WSOT-323PNP transistor, 3 pins, Galaxy MicroelectronicsPNP transistorSOT-3233 pinsGalaxy Microelectronics
- What it is
- PNP transistor
- Maker
- Galaxy Microelectronics
- Package
- SOT-323
- Pins
- 3
- Details
- 45V, 0.5A, General Purpose PNP Bipolar Transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
ULC0502T3SOT-523ESD protection diode, 3 pins, LeiditechESD protection diodeSOT-5233 pinsLeiditech
- What it is
- ESD protection diode
- Maker
- Leiditech
- Package
- SOT-523
- Pins
- 3
- Details
- ESD protection diode, VRWM 5 V, Cj 0.6 pF
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
USB0405CSOT-143ESD protection diode, 4 pins, ProTek DevicesESD protection diodeSOT-1434 pinsProTek Devices
- What it is
- ESD protection diode
- Maker
- ProTek Devices
- Package
- SOT-143
- Pins
- 4
- Details
- 350 Watt Low Capacitance TVS Array
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
3 more parts have no package on record
PG05FBESCESD protection diode, KECESD protection diodeNot recordedNot recordedKEC
- What it is
- ESD protection diode
- Maker
- KEC
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
TVD5R0BWTESD protection diode, Taitron ComponentsESD protection diodeNot recordedNot recordedTaitron Components
- What it is
- ESD protection diode
- Maker
- Taitron Components
- Package
- Not recorded
- Pins
- Not recorded
- Details
- SMD TVS Arrays (Two Terminals)
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
VBUS05N1-DD1ESD protection diode, VishayESD protection diodeNot recordedNot recordedVishay
- What it is
- ESD protection diode
- Maker
- Vishay
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Ultra Low Capacitance Bidirectional Symmetrical (BiSy) Single Line ESD Protection Diode in DFN1006-2B
- Source
- Manufacturer 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.
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.
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.
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