SMD code 3Ft
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, t, is lower case, which on NXP and Philips parts is a date or factory code, so it was set aside and 3F was searched.
122 parts are printed 3Ft
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.
BC857BTSOT-416PNP transistor, 3 pins, onsemiPNP transistorSOT-4163 pinsonsemi
- What it is
- PNP transistor
- Maker
- onsemi
- Package
- SOT-416
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
BC857BT-7-FSOT-523PNP transistor, 3 pins, HXYPNP transistorSOT-5233 pinsHXY
- What it is
- PNP transistor
- Maker
- HXY
- Package
- SOT-523
- Pins
- 3
- Details
- Bipolar transistor, 45 V, 0.1 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
BC857BVSOT-563Dual PNP transistor, 6 pins, NexperiaDual PNP transistorSOT-5636 pinsNexperia
- What it is
- Dual PNP transistor
- Maker
- Nexperia
- Package
- SOT-563
- Pins
- 6
- Details
- 45V, 0.1A, General Purpose PNP Bipolar Transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor pair.
BC857BWSOT-323Transistor, 3 pins, DiotecTransistorSOT-3233 pinsDiotec
- What it is
- Transistor
- Maker
- Diotec
- Package
- SOT-323
- Pins
- 3
- Details
- SMD General Purpose PNP Transistors
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
BC857BW-HFSOT-323PNP transistor, 3 pins, ComchipPNP transistorSOT-3233 pinsComchip
- What it is
- PNP transistor
- Maker
- Comchip
- Package
- SOT-323
- Pins
- 3
- Details
- -45 V, -0.1 A PNP transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
BC857BW-Q1SOT-323PNP transistor, 3 pins, Formosa MicrosemiPNP transistorSOT-3233 pinsFormosa Microsemi
- What it is
- PNP transistor
- Maker
- Formosa Microsemi
- Package
- SOT-323
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
BC857BWHSOT-323PNP transistor, 3 pins, Taiwan SemiconductorPNP transistorSOT-3233 pinsTaiwan Semiconductor
- What it is
- PNP transistor
- Maker
- Taiwan Semiconductor
- Package
- SOT-323
- Pins
- 3
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
BC857SSOT-363Transistor, 6 pins, DiotecTransistorSOT-3636 pinsDiotec
- What it is
- Transistor
- Maker
- Diotec
- Package
- SOT-363
- Pins
- 6
- Details
- SMD General Purpose PNP Transistors
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
BC858BSOT-23PNP transistor, 3 pins, DiotecPNP transistorSOT-233 pinsDiotec
- What it is
- PNP transistor
- Maker
- Diotec
- Package
- SOT-23
- Pins
- 3
- Details
- -30 V PNP small-signal transistor, gain group B
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
BC858BWSOT-323Transistor, 3 pins, DiotecTransistorSOT-3233 pinsDiotec
- What it is
- Transistor
- Maker
- Diotec
- Package
- SOT-323
- Pins
- 3
- Details
- SMD General Purpose PNP Transistors
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
BC859BSOT-23Transistor, 3 pins, DiotecTransistorSOT-233 pinsDiotec
- What it is
- Transistor
- Maker
- Diotec
- Package
- SOT-23
- Pins
- 3
- Details
- SMD General Purpose PNP Transistors
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
BC859BWSOT-323Transistor, 3 pins, DiotecTransistorSOT-3233 pinsDiotec
- What it is
- Transistor
- Maker
- Diotec
- Package
- SOT-323
- Pins
- 3
- Details
- SMD General Purpose PNP Transistors
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
BC860BSOT-23Transistor, 3 pins, DiotecTransistorSOT-233 pinsDiotec
- What it is
- Transistor
- Maker
- Diotec
- Package
- SOT-23
- Pins
- 3
- Details
- SMD General Purpose PNP Transistors
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Bipolar transistor.
BCW70SOT-23PNP transistor, 3 pins, HXYPNP transistorSOT-233 pinsHXY
- What it is
- PNP transistor
- Maker
- HXY
- Package
- SOT-23
- Pins
- 3
- Details
- PNP bipolar transistor
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
BCW70,215SOT-23PNP transistor, 3 pins, HXYPNP transistorSOT-233 pinsHXY
- What it is
- PNP transistor
- Maker
- HXY
- Package
- SOT-23
- Pins
- 3
- Details
- Bipolar transistor, 45 V, 0.1 A
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: PNP transistor.
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.
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.
PNP transistor pair
Diode range, part lifted. Test each transistor on its own pins, as the datasheet's pinout gives them.
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.
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