SMD code BDp
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, p, is lower case, which on NXP and Philips parts is a date or factory code, so it was set aside and BD was searched.
159 parts are printed BDp
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.
TLV707135DQNX2SONLDO regulator, 4 pins, Texas InstrumentsLDO regulatorX2SON4 pinsTexas Instruments
- What it is
- LDO regulator
- Maker
- Texas Instruments
- Package
- X2SON
- Pins
- 4
- Details
- 200-mA, Low-IQ, Low-Noise, Low-Dropout Regulator for Portable Devices
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Voltage regulator.
TV15C7V5JB-HFSMCTVS diode, 2 pins, ComchipTVS diodeSMC2 pinsComchip
- What it is
- TVS diode
- Maker
- Comchip
- Package
- SMC
- Pins
- 2
- Details
- 7.5 V 1500 W bidirectional TVS diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
UDZ6V2BSOD-323Zener diode, 2 pins, Galaxy MicroelectronicsZener diodeSOD-3232 pinsGalaxy Microelectronics
- What it is
- Zener diode
- Maker
- Galaxy Microelectronics
- Package
- SOD-323
- Pins
- 2
- Details
- 6.2V, 200mW, Surface Mount Zener Diodes
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Zener diode.
SMCJ7.5CA/TR13SMCTVS diode, 2 pins, HXYTVS diodeSMC2 pinsHXY
- What it is
- TVS diode
- Maker
- HXY
- Package
- SMC
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: TVS or ESD protection diode.
1.5SMC9.1CASMCTVS diode, 2 pins, Ruilong Yuan ElectronicsTVS diodeSMC2 pinsRuilong Yuan Electronics
- What it is
- TVS diode
- Maker
- Ruilong Yuan Electronics
- Package
- SMC
- Pins
- 2
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
1.5SMCJ7.5ACSMC2 pins, PanjitNot recordedSMC2 pinsPanjit
- What it is
- Not recorded
- Maker
- Panjit
- Package
- SMC
- Pins
- 2
- Details
- TVS: 7.5V, 116.3A, 1500W (1ms), Bidirectional
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
1.5SMCJ7.5CASMCTVS diode, 2 pins, PanjitTVS diodeSMC2 pinsPanjit
- What it is
- TVS diode
- Maker
- Panjit
- Package
- SMC
- Pins
- 2
- Details
- Transient voltage supressor: Vrwm=7.5V, Vbr=8.33..9.21V, Ipp=116.3A, 1500W(1ms), Bidir.
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
1SS271SOT-23Schottky diode, 3 pins, ToshibaSchottky diodeSOT-233 pinsToshiba
- What it is
- Schottky diode
- Maker
- Toshiba
- Package
- SOT-23
- Pins
- 3
- Details
- dual series mixer/detector UHF to S-band
- Source
- Published code list
Is it dead? The meter test is below: Schottky diode.
2SA1733K-PSOT-23PNP transistor, 3 pins, ROHMPNP transistorSOT-233 pinsROHM
- What it is
- PNP transistor
- Maker
- ROHM
- Package
- SOT-23
- Pins
- 3
- Details
- Si-pnp: Sw, 30V, 30mA, 200mW, B=82..180, >400MHz
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
2SA1808-PSOT-323RF transistor, 3 pins, ROHMRF transistorSOT-3233 pinsROHM
- What it is
- RF transistor
- Maker
- ROHM
- Package
- SOT-323
- Pins
- 3
- Details
- Si-pnp: RF, 30V, 30mA, 200mW, B=82..180, >400MHz
- Source
- Published code list
Is it dead? The meter test is below: Bipolar transistor.
2SA1821-PSOT-416PNP transistor, 3 pins, ROHMPNP transistorSOT-4163 pinsROHM
- What it is
- PNP transistor
- Maker
- ROHM
- Package
- SOT-416
- Pins
- 3
- Details
- PNP transistor: HF, 20V, 30mA, 150mW, >400MHz, B=82..180
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
2SB1189-PSOT-89PNP transistor, 3 pins, ROHMPNP transistorSOT-893 pinsROHM
- What it is
- PNP transistor
- Maker
- ROHM
- Package
- SOT-89
- Pins
- 3
- Details
- Si-pnp: AF, 80V, 800mA, 500mW, B=82..180, >100MHz
- Source
- Published code list
Is it dead? The meter test is below: PNP transistor.
15SMBJ7.5CASMBTVS diode, 2 pins, UN SemiconductorTVS diodeSMB2 pinsUN Semiconductor
- What it is
- TVS diode
- Maker
- UN Semiconductor
- Package
- SMB
- Pins
- 2
- Details
- Transient voltage supressor: Vrwm=7.5V, Vbr=8.33..9.21V, Ipp=116.3A, 1500W(1ms), Bidir.
- 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
TSD024-40WUSchottky diode, Taitron ComponentsSchottky diodeNot recordedNot recordedTaitron Components
- What it is
- Schottky diode
- Maker
- Taitron Components
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Schottky Barrier Diodes (Two Terminals)
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
ADP172ACBZ-1.65-R74 pins, Analog DevicesNot recordedNot recorded4 pinsAnalog Devices
- What it is
- Not recorded
- Maker
- Analog Devices
- Package
- Not recorded
- Pins
- 4
- Details
- equivalent [1.65V LDO]
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
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.
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.
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.
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.
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.
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.
Bipolar transistor
Diode range, part lifted or its base leg off the pad.
Working, it reads
From the base, one probe colour 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.
Did you find your part?
Open this in the search to correct a character or try another package.