SMD code B14
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.
18 parts are printed B14
Not sure which one you have?
Answer up to 4 quick questions and these 18 parts are ranked, with a meter test that settles it. It works on a dead part too.
SMAB14SMASchottky diode, 2 pins, KECSchottky diodeSMA2 pinsKEC
- What it is
- Schottky diode
- Maker
- KEC
- Package
- SMA
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
SMFB14SOD-123FSchottky diode, 2 pins, KECSchottky diodeSOD-123F2 pinsKEC
- What it is
- Schottky diode
- Maker
- KEC
- Package
- SOD-123F
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
2SC3739-14SOT-233 pins, NEC ElectronicsNot recordedSOT-233 pinsNEC Electronics
- What it is
- Not recorded
- Maker
- NEC Electronics
- Package
- SOT-23
- Pins
- 3
- Details
- Si-npn: HF, Sw, 60V, 500mA, 200mW, 400MHz, B=150..300
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SC3739B14SOT-233 pins, RenesasNot recordedSOT-233 pinsRenesas
- What it is
- Not recorded
- Maker
- Renesas
- Package
- SOT-23
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SC4173-14SOT-3233 pins, NEC ElectronicsNot recordedSOT-3233 pinsNEC Electronics
- What it is
- Not recorded
- Maker
- NEC Electronics
- Package
- SOT-323
- Pins
- 3
- Details
- Si-npn: Sw, 60V, 500mA, 150mW, B=150..300, >200MHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
2SC4173B14SOT-3233 pins, RenesasNot recordedSOT-3233 pinsRenesas
- What it is
- Not recorded
- Maker
- Renesas
- Package
- SOT-323
- Pins
- 3
- Source
- Published code list
Is it dead? The meter test is below: This part.
B140SMASchottky diode, 2 pins, VishaySchottky diodeSMA2 pinsVishay
- What it is
- Schottky diode
- Maker
- Vishay
- Package
- SMA
- Pins
- 2
- Details
- Diode: SBR, 40V, 1A, Vf<0.52V(1A)
- Source
- Published code list
Is it dead? The meter test is below: Schottky diode.
BV-SMBJ14ASMBTVS diode, 2 pins, Bencent ElectronicsTVS diodeSMB2 pinsBencent Electronics
- What it is
- TVS diode
- Maker
- Bencent Electronics
- Package
- SMB
- Pins
- 2
- Details
- Transient voltage supressor: Vrwm=14V, Vbr=15.6..19.8V, 23.3A, 600W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
LN6206P142KRSOT-353LDO regulator, 5 pins, Infinewin Electron TechniqueLDO regulatorSOT-3535 pinsInfinewin Electron Technique
- What it is
- LDO regulator
- Maker
- Infinewin Electron Technique
- Package
- SOT-353
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 1.4V±2%, 300mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
LN6206P142MRSOT-23LDO regulator, 3 pins, Infinewin Electron TechniqueLDO regulatorSOT-233 pinsInfinewin Electron Technique
- What it is
- LDO regulator
- Maker
- Infinewin Electron Technique
- Package
- SOT-23
- Pins
- 3
- Details
- Linear voltage regulator IC: LDO, 1.4V±2%, 300mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
LN6206P142PRSOT-89LDO regulator, 3 pins, Infinewin Electron TechniqueLDO regulatorSOT-893 pinsInfinewin Electron Technique
- What it is
- LDO regulator
- Maker
- Infinewin Electron Technique
- Package
- SOT-89
- Pins
- 3
- Details
- Linear voltage regulator IC: LDO, 1.4V±2%, 300mA
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
MBRA140SMASchottky diode, 2 pins, onsemiSchottky diodeSMA2 pinsonsemi
- What it is
- Schottky diode
- Maker
- onsemi
- Package
- SMA
- Pins
- 2
- Details
- Si-diode: Schottky, Rectifier, 40V, 1A, Vf<0,55V(1A)
- Source
- Published code list
Is it dead? The meter test is below: Schottky diode.
3 more parts have no package on record
TSA14Schottky diode, Taitron ComponentsSchottky diodeNot recordedNot recordedTaitron Components
- What it is
- Schottky diode
- Maker
- Taitron Components
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Surface Mount Schottky Rectifiers
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
TSMF14Schottky diode, Taitron ComponentsSchottky diodeNot recordedNot recordedTaitron Components
- What it is
- Schottky diode
- Maker
- Taitron Components
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Surface Mount Schottky Rectifiers
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
MBRS140Schottky diode, onsemiSchottky diodeNot recordedNot recordedonsemi
- What it is
- Schottky diode
- Maker
- onsemi
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Si-diode: Schottky, Pow-Rect, 40V, 1A, Vf=0,55V(1A)
- Source
- Published code list
Is it dead? The meter test is below: Schottky 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.
Schottky diode
Diode range, part lifted or one leg off the pad. Red probe on the anode.
Working, it reads
About 0.15 to 0.45 V anode to cathode, roughly half a silicon diode, and open the other way.
Dead, it reads
- The same reading both ways round, near 0 V with a continuous beep or the same middling value: shorted.
- A reading the wrong way round as well: leaky.
- Open both ways: failed open.
- 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 large Schottky can read about 0.1 V forward and beep like a short, and leaks a little the wrong way when good, more when warm. It is shorted only if it reads the same both ways. Measure it cold, beside an identical cold one.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
This part
Diode range and ohms range, part lifted.
Working, it reads
Depends on what it is. The datasheet, or an identical part, says.
Dead, it reads
- Between two pins, the same reading both ways, near 0 V with a continuous beep: shorted.
- Open between every pair of pins: failed open, or a part that reads open when working.
- 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.
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.
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.
Printed with a code easy to misread as B14
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 B14
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 39 more parts.
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