SMD code 03
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.
12 parts are printed 03
Not sure which one you have?
Answer up to 4 quick questions and these 12 parts are ranked, with a meter test that settles it. It works on a dead part too.
DTC143TCASOT-23Digital transistor (NPN, resistors built in), 3 pins, JSCJDigital transistor (NPN, resistors built in)SOT-233 pinsJSCJ
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- JSCJ
- Package
- SOT-23
- Pins
- 3
- Details
- Digital transistor (bias resistors built in), NPN
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
DTC143TESOT-416Digital transistor (NPN, resistors built in), 3 pins, ROHMDigital transistor (NPN, resistors built in)SOT-4163 pinsROHM
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- ROHM
- Package
- SOT-416
- Pins
- 3
- Details
- Digital transistor (bias resistors built in), NPN
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
DTC143TE3SOT-416Digital transistor (NPN, resistors built in), 3 pins, ROHMDigital transistor (NPN, resistors built in)SOT-4163 pinsROHM
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- ROHM
- Package
- SOT-416
- Pins
- 3
- Details
- NPN 50V, 100mA digital transistor (bias resistor built-in)
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
DTC143TEBSOT-416Digital transistor (NPN, resistors built in), 3 pins, ROHMDigital transistor (NPN, resistors built in)SOT-4163 pinsROHM
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- ROHM
- Package
- SOT-416
- Pins
- 3
- Details
- NPN digital transistor (bias resistor built-in); R1 = 4.7kOhm
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
DTC143TKASOT-23Digital transistor (NPN, resistors built in), 3 pins, ROHMDigital transistor (NPN, resistors built in)SOT-233 pinsROHM
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- ROHM
- Package
- SOT-23
- Pins
- 3
- Details
- NPN digital transistor (bias resistor built-in); R1 = 4.7kOhm
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
DTC143TMSOT-723Digital transistor (NPN, resistors built in), 3 pins, ROHMDigital transistor (NPN, resistors built in)SOT-7233 pinsROHM
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- ROHM
- Package
- SOT-723
- Pins
- 3
- Details
- Digital transistor (bias resistors built in), NPN
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
DTC143TU3SOT-323Digital transistor (NPN, resistors built in), 3 pins, ROHMDigital transistor (NPN, resistors built in)SOT-3233 pinsROHM
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- ROHM
- Package
- SOT-323
- Pins
- 3
- Details
- NPN 50V, 100mA digital transistor (bias resistor built-in)
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
DTC143TUASOT-323Digital transistor (NPN, resistors built in), 3 pins, ROHMDigital transistor (NPN, resistors built in)SOT-3233 pinsROHM
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- ROHM
- Package
- SOT-323
- Pins
- 3
- Details
- Digital transistor (bias resistors built in), NPN
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
DTC143TUBSOT-323Digital transistor (NPN, resistors built in), 3 pins, ROHMDigital transistor (NPN, resistors built in)SOT-3233 pinsROHM
- What it is
- Digital transistor (NPN, resistors built in)
- Maker
- ROHM
- Package
- SOT-323
- Pins
- 3
- Details
- NPN digital transistor (bias resistor built-in); R1 = 4.7kOhm
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
PDTA114ETSOT-23Digital transistor (PNP, resistors built in), 3 pins, NexperiaDigital transistor (PNP, resistors built in)SOT-233 pinsNexperia
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- Nexperia
- Package
- SOT-23
- Pins
- 3
- Pinout
- 1 base
- 2 emitter
- 3 collector
- Details
- 50 V, 100 mA PNP resistor-equipped transistor; R1 = 10 kOhm, R2 = 10 kOhm
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
PDTA114EUSOT-323Digital transistor (PNP, resistors built in), 3 pins, NexperiaDigital transistor (PNP, resistors built in)SOT-3233 pinsNexperia
- What it is
- Digital transistor (PNP, resistors built in)
- Maker
- Nexperia
- Package
- SOT-323
- Pins
- 3
- Details
- 50 V, 100 mA PNP resistor-equipped transistor; R1 = 10 kΩ, R2 = 10 kΩ
- Source
- From the manufacturer's datasheet
Is it dead? The meter test is below: Digital transistor.
EIA-96:030603Precision 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 10.5; the printed mark adds a multiplier letter (03A = 105 Ohm, 03B = 1.05 kOhm)
- Source
- Added by hand from a published table
Is it dead? The meter test is below: Resistor.
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.
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.
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.
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.
Printed with a code easy to misread as 03
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 03
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.