SMD code 34 in SOT-363
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.
10 parts in SOT-363 are printed 34
Not sure which one you have?
Answer up to 4 quick questions and these 37 parts are ranked, with a meter test that settles it. It works on a dead part too.
FMUN5334DW1SOT-363Digital transistor (resistors built in), 6 pins, Formosa MicrosemiDigital transistor (resistors built in)6 pinsFormosa Microsemi
- What it is
- Digital transistor (resistors built in)
- Maker
- Formosa Microsemi
- Package
- SOT-363
- Pins
- 6
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
LMUN5334DW1T1GSOT-363Digital transistor (resistors built in), 6 pins, LRCDigital transistor (resistors built in)6 pinsLRC
- What it is
- Digital transistor (resistors built in)
- Maker
- LRC
- Package
- SOT-363
- Pins
- 6
- Details
- Digital transistor (bias resistors built in), P+N, IC 100 mA, VCEO 50 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
MUN5334DW1SOT-363Digital transistor (resistors built in), 6 pins, onsemiDigital transistor (resistors built in)6 pinsonsemi
- What it is
- Digital transistor (resistors built in)
- Maker
- onsemi
- Package
- SOT-363
- Pins
- 6
- Details
- Complementary Bias Resistor Transistors R1 = 22 k , R2 = 47 k
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
NSVMUN5334DW1SOT-363Digital transistor (resistors built in), 6 pins, onsemiDigital transistor (resistors built in)6 pinsonsemi
- What it is
- Digital transistor (resistors built in)
- Maker
- onsemi
- Package
- SOT-363
- Pins
- 6
- Details
- Complementary Bias Resistor Transistors R1 = 22 k , R2 = 47 k
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
S-LMUN5334DW1T1GSOT-363Digital transistor (resistors built in), 6 pins, LRCDigital transistor (resistors built in)6 pinsLRC
- What it is
- Digital transistor (resistors built in)
- Maker
- LRC
- Package
- SOT-363
- Pins
- 6
- Details
- Digital transistor (bias resistors built in), P+N, IC 100 mA, VCEO 50 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
SMUN5334DWSOT-363Digital transistor (resistors built in), 6 pins, SeCoSDigital transistor (resistors built in)6 pinsSeCoS
- What it is
- Digital transistor (resistors built in)
- Maker
- SeCoS
- Package
- SOT-363
- Pins
- 6
- Details
- Digital (resistor-equipped) transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
TUNM2NSOT-363Digital transistor (resistors built in), 6 pins, Galaxy MicroelectronicsDigital transistor (resistors built in)6 pinsGalaxy Microelectronics
- What it is
- Digital transistor (resistors built in)
- Maker
- Galaxy Microelectronics
- Package
- SOT-363
- Pins
- 6
- Details
- 50V, 100mA, NPN Bipolar Digital Transistor 50V, 100mA, PNP Bipolar Digital Transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
UNM2NSOT-363Digital transistor (resistors built in), 6 pins, Galaxy MicroelectronicsDigital transistor (resistors built in)6 pinsGalaxy Microelectronics
- What it is
- Digital transistor (resistors built in)
- Maker
- Galaxy Microelectronics
- Package
- SOT-363
- Pins
- 6
- Details
- 50V, 100mA, NPN Bipolar Digital Transistor 50V, 100mA, PNP Bipolar Digital Transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Digital transistor.
MUN5334DWSOT-3636 pins, MotorolaNot recorded6 pinsMotorola
- What it is
- Not recorded
- Maker
- Motorola
- Package
- SOT-363
- Pins
- 6
- Details
- Si-n/p-Digi: Dual, Sw, 50V, 100mA, 200mW, R1/R2=22k/47k
- Source
- Published code list
Is it dead? The meter test is below: This part.
MUN5334DW1T1SOT-3636 pins, onsemiNot recorded6 pinsonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- SOT-363
- Pins
- 6
- Source
- Published code list
Is it dead? The meter test is below: This part.
5 more parts have no package on record. Nothing rules them out, so they stay.
BFCN-1575+RF filter, Mini-CircuitsRF filterNot recordedMini-Circuits
- What it is
- RF filter
- Maker
- Mini-Circuits
- Package
- Not recorded
- Pins
- Not recorded
- Details
- LTCC filter, 1530-1620 MHz
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: This part.
CDBMHT340-HFSchottky diode, ComchipSchottky diodeNot recordedComchip
- What it is
- Schottky diode
- Maker
- Comchip
- Package
- Not recorded
- Pins
- Not recorded
- Details
- 40 V, 3 A Schottky barrier diode
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
CHSDCDJGPSchottky diode, ChenmkoSchottky diodeNot recordedChenmko
- What it is
- Schottky diode
- Maker
- Chenmko
- Package
- Not recorded
- Pins
- Not recorded
- Details
- SCHOTTKY BARRIER RECTIFIER, 40 V, 3.0 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
CHSDCDJGP-ASchottky diode, ChenmkoSchottky diodeNot recordedChenmko
- What it is
- Schottky diode
- Maker
- Chenmko
- Package
- Not recorded
- Pins
- Not recorded
- Details
- SCHOTTKY BARRIER RECTIFIER, 40 V, 3.0 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
ET3164Load switch, ETEKLoad switchNot recordedETEK
- What it is
- Load switch
- Maker
- ETEK
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Load switch.
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.
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.
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.
Load switch
Voltage, board powered, black probe on ground.
Working, it reads
Switched on, the output pin sits at the input voltage. Switched off, it sits near 0 V.
Dead, it reads
- Output at the input voltage while switched off: the pass element has shorted.
- Input present and switched on, no output: failed open, or shut down into a shorted load. Power off and measure output to ground.
- On the board:
- An output near 0 Ω to ground is usually the load. Lift the output pin to see which.
- Compare:
- If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
- Watch for:
- The pinout and whether the enable is active high or low differ between parts. The datasheet gives both.
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 34
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 155 more parts.
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