SMD code 33
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.
14 parts are printed 33
Not sure which one you have?
Answer up to 4 quick questions and these 14 parts are ranked, with a meter test that settles it. It works on a dead part too.
BZX384-A12SOD-323Zener diode, 2 pins, NexperiaZener diodeSOD-3232 pinsNexperia
- What it is
- Zener diode
- Maker
- Nexperia
- Package
- SOD-323
- Pins
- 2
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Zener diode.
DTA143XCASOT-23Digital transistor (PNP, resistors built in), 3 pins, JSCJDigital transistor (PNP, resistors built in)SOT-233 pinsJSCJ
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- JSCJ
- Package
- SOT-23
- Pins
- 3
- Details
- Digital transistor (bias resistors built in), PNP
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
DTA143XESOT-416Digital transistor (PNP, resistors built in), 3 pins, ROHMDigital transistor (PNP, resistors built in)SOT-4163 pinsROHM
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- ROHM
- Package
- SOT-416
- Pins
- 3
- Details
- Digital transistor (bias resistors built in), PNP
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
DTA143XE3SOT-416Digital transistor (PNP, resistors built in), 3 pins, ROHMDigital transistor (PNP, resistors built in)SOT-4163 pinsROHM
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- ROHM
- Package
- SOT-416
- Pins
- 3
- Details
- PNP -50V, -100mA digital transistor (bias resistor built-in)
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
DTA143XEBSOT-416Digital transistor (PNP, resistors built in), 3 pins, ROHMDigital transistor (PNP, resistors built in)SOT-4163 pinsROHM
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- ROHM
- Package
- SOT-416
- Pins
- 3
- Details
- PNP digital transistor (bias resistor built-in); R1 = 4.7kOhm, R2 = 10kOhm
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
DTA143XKASOT-23Digital transistor (PNP, resistors built in), 3 pins, ROHMDigital transistor (PNP, resistors built in)SOT-233 pinsROHM
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- ROHM
- Package
- SOT-23
- Pins
- 3
- Details
- PNP digital transistor (bias resistor built-in); R1 = 4.7kOhm, R2 = 10kOhm
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
DTA143XMSOT-723Digital transistor (PNP, resistors built in), 3 pins, JSCJDigital transistor (PNP, resistors built in)SOT-7233 pinsJSCJ
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- JSCJ
- Package
- SOT-723
- Pins
- 3
- Details
- Digital transistor (bias resistors built in), PNP
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
DTA143XU3SOT-323Digital transistor (PNP, resistors built in), 3 pins, ROHMDigital transistor (PNP, resistors built in)SOT-3233 pinsROHM
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- ROHM
- Package
- SOT-323
- Pins
- 3
- Details
- PNP -50V, -100mA digital transistor (bias resistor built-in)
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
DTA143XUASOT-323Digital transistor (PNP, resistors built in), 3 pins, JSCJDigital transistor (PNP, resistors built in)SOT-3233 pinsJSCJ
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- JSCJ
- Package
- SOT-323
- Pins
- 3
- Details
- Digital transistor (bias resistors built in), PNP
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
DTA143XUBSOT-323Digital transistor (PNP, resistors built in), 3 pins, ROHMDigital transistor (PNP, resistors built in)SOT-3233 pinsROHM
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- ROHM
- Package
- SOT-323
- Pins
- 3
- Details
- PNP digital transistor (bias resistor built-in); R1 = 4.7kOhm, R2 = 10kOhm
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
SML4752SMAZener diode, 2 pins, VishayZener diodeSMA2 pinsVishay
- What it is
- Zener diode
- Maker
- Vishay
- Package
- SMA
- Pins
- 2
- Details
- 33 V Zener diode
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Zener diode.
TLV74033PDQNX2SONLDO regulator, 4 pins, Texas InstrumentsLDO regulatorX2SON4 pinsTexas Instruments
- What it is
- LDO regulator
- Maker
- Texas Instruments
- Package
- X2SON
- Pins
- 4
- Details
- 300mA, Low-Dropout Regulator With Foldback Current Limit
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Voltage regulator.
EIA-96:330603Precision resistor (EIA-96 code), 2 pinsPrecision resistor (EIA-96 code)06032 pinsNot recorded
- What it is
- Precision resistor (EIA-96 code)
- Maker
- Not recorded
- Package
- 0603
- Pins
- 2
- Details
- EIA-96 precision chip resistor, significand 21.5; the printed mark adds a multiplier letter (33A = 215 Ohm, 33B = 2.15 kOhm)
- Source
- Added by hand from a published table
Is it dead? The meter test is below: Resistor.
1 more part has no package on record
VSKY023063Schottky diode, VishaySchottky diodeNot recordedNot recordedVishay
- What it is
- Schottky diode
- Maker
- Vishay
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Small Signal Schottky Diode FlipKY Gen 3
- Source
- From the manufacturer's datasheet
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.
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.
Digital transistor
Ohms range, part lifted. The datasheet gives the built-in resistors: R1 in series with the base, R2 from base to emitter.
Working, it reads
Base to emitter reads about R1 plus R2 either way round, about 20 kΩ on a 10 k and 10 k part, give or take their wide tolerance. Collector to emitter reads open. A part with no R2 reads a junction behind R1 one way instead.
Dead, it reads
- Collector to emitter the same both ways, near 0 Ω with a continuous beep: shorted.
- From the base, open or far above R1 plus R2: R1 has failed. Static damage shows here most often.
- Base to emitter near 0 Ω: failed short.
- 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:
- The readings depend on the resistor values, so an identical part elsewhere on the board is the surest reference. Measure it the same way.
- Watch for:
- On the diode range a good part with 10 kΩ resistors reads open on every pair, so a good part looks dead there. Use the ohms range.
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.
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.
Resistor
Ohms range, across it, power off.
Working, it reads
Its marked value, within tolerance. On the board it reads the same or lower, because everything around it sits in parallel.
Dead, it reads
- Open: burnt, cracked, or eaten through by sulphur. The commonest failure.
- Well above its marked value: drifted high.
- On the board, clearly higher than its marked value: it has failed, since the board can only pull a reading down.
- On the board:
- A reading lower than marked on the board proves nothing; lift one end. A reading higher than marked is a fault even on the board.
- Compare:
- The same position on another channel usually carries the same value, and so does the matching part on another board.
- Watch for:
- A burnt resistor usually means the part it feeds pulled too much. Find that before fitting a new one, or it burns too. The marking, not the reading, says what to fit.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Codes that begin with 33
For a marking with its end worn or burnt off. Each code has a page of its own.
Open this in the search to correct a character or try another package.