SMD code 46 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 46
Not sure which one you have?
Answer up to 4 quick questions and these 33 parts are ranked, with a meter test that settles it. It works on a dead part too.
FMBT3946DWSOT-363Complementary transistor pair (NPN and PNP), 6 pins, Formosa MicrosemiComplementary transistor pair (NPN and PNP)6 pinsFormosa Microsemi
- What it is
- Complementary transistor pair (NPN and PNP)
- Maker
- Formosa Microsemi
- Package
- SOT-363
- Pins
- 6
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor pair.
LMBT3946DW1T1GSOT-363Transistor, 6 pins, LRCTransistor6 pinsLRC
- What it is
- Transistor
- Maker
- LRC
- Package
- SOT-363
- Pins
- 6
- Details
- Bipolar transistor, P+N, IC 200 mA, VCEO 40 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
MBT3946DW1SOT-363Complementary transistor pair (NPN and PNP), 6 pins, onsemiComplementary transistor pair (NPN and PNP)6 pinsonsemi
- What it is
- Complementary transistor pair (NPN and PNP)
- Maker
- onsemi
- Package
- SOT-363
- Pins
- 6
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor pair.
MMDT3946SOT-363Transistor, 6 pins, Blue RocketTransistor6 pinsBlue Rocket
- What it is
- Transistor
- Maker
- Blue Rocket
- Package
- SOT-363
- Pins
- 6
- Details
- Bipolar transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
MMDT3946-CSOT-363Transistor, 6 pins, SeCoSTransistor6 pinsSeCoS
- What it is
- Transistor
- Maker
- SeCoS
- Package
- SOT-363
- Pins
- 6
- Details
- Bipolar transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
S-LMBT3946DW1T1GSOT-363Complementary transistor pair (NPN and PNP), 6 pins, LRCComplementary transistor pair (NPN and PNP)6 pinsLRC
- What it is
- Complementary transistor pair (NPN and PNP)
- Maker
- LRC
- Package
- SOT-363
- Pins
- 6
- Details
- Bipolar transistor, PNP/NPN, IC 200 mA, VCEO 40 V
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor pair.
SMBT3946DW1SOT-363Complementary transistor pair (NPN and PNP), 6 pins, onsemiComplementary transistor pair (NPN and PNP)6 pinsonsemi
- What it is
- Complementary transistor pair (NPN and PNP)
- Maker
- onsemi
- Package
- SOT-363
- Pins
- 6
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor pair.
HBNP45S6RSOT-363Complementary transistor pair (NPN and PNP), 6 pins, CYStekComplementary transistor pair (NPN and PNP)6 pinsCYStek
- What it is
- Complementary transistor pair (NPN and PNP)
- Maker
- CYStek
- Package
- SOT-363
- Pins
- 6
- Details
- 50/-50 V, 0.15/-0.15 A NPN+PNP transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor pair.
MBT3946DWSOT-3636 pins, onsemiNot recorded6 pinsonsemi
- What it is
- Not recorded
- Maker
- onsemi
- Package
- SOT-363
- Pins
- 6
- Details
- Si-n/p: Dual, GP, 60V, 200mA, 150mW, B= 100..300, >300MHz
- Source
- Published code list
Is it dead? The meter test is below: This part.
MBT3946DW1T1SOT-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-7900+RF filter, Mini-CircuitsRF filterNot recordedMini-Circuits
- What it is
- RF filter
- Maker
- Mini-Circuits
- Package
- Not recorded
- Pins
- Not recorded
- Details
- LTCC filter, 7800-8100 MHz
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: This part.
EMB32A03VADual N-channel MOSFET, Excelliance MOSDual N-channel MOSFETNot recordedExcelliance MOS
- What it is
- Dual N-channel MOSFET
- Maker
- Excelliance MOS
- Package
- Not recorded
- Pins
- Not recorded
- Details
- 30 V, 5.5 A dual N-channel MOSFET
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: N-channel MOSFET pair.
SGM2038-3.3XUDY4GLDO regulator, 4 pins, SG MicroLDO regulator4 pinsSG Micro
- What it is
- LDO regulator
- Maker
- SG Micro
- Package
- Not recorded
- Pins
- 4
- Details
- 3.3 V output, 500mA, Low Noise, Very Low Dropout Bias Rail CMOS Voltage Regulator
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Voltage regulator.
SGM2045LC-0.8XXDH4GLDO regulator, 4 pins, SG MicroLDO regulator4 pinsSG Micro
- What it is
- LDO regulator
- Maker
- SG Micro
- Package
- Not recorded
- Pins
- 4
- Details
- 0.8 V output, 300mA, Low VIN, Ultra-Low Noise, Start-Up Current, High PSRR Linear Regulator
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Voltage regulator.
ADP150ACBZ-2.8-R7LDO regulator, 4 pins, Analog DevicesLDO regulator4 pinsAnalog Devices
- What it is
- LDO regulator
- Maker
- Analog Devices
- Package
- Not recorded
- Pins
- 4
- Details
- Linear voltage regulator IC: LDO, 2.8V±1%, 150mA, +CE
- 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.
Bipolar transistor pair
Diode range, part lifted. Test each transistor on its own pins, as the datasheet's pinout gives them.
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.
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.
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.
N-channel MOSFET pair
Diode range, part lifted. Test drain to source first, then short gate to source and test again. Test each MOSFET on its own pins, as the datasheet's pinout gives them.
Working, it reads
Red probe on the source, black on the drain: about 0.4 to 0.9 V, the body diode. Open the other way. The gate reads open to both other pins, both ways.
Dead, it reads
- Drain to source the same both ways, near 0 V with a continuous beep, and still so after shorting gate to source: shorted. The classic failure.
- The gate reads low to source or drain: gate shorted. Often all three pins end up shorted together.
- No body diode at all: failed open.
- On the board
- the gate usually has a resistor to the source, so gate to source reads that resistor, which is not a fault. A drain short can be the load. Lift a leg to be sure.
- 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 diode range can charge the gate enough to turn the part on, and then drain to source reads near 0 both ways on a good part. Short gate to source and test again before you condemn it.
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 46
One character differs, and it is one that is easy to confuse under a lamp. Each code has a page of its own.
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