1 W Small Signal Bipolar Junction Transistors (BJT) 944

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Part RoHS Manufacturer Polarity or Channel Type Configuration Surface Mount Nominal Transition Frequency (fT) Maximum Power Dissipation (Abs) Maximum Collector Current (IC) Package Body Material Transistor Application Maximum Rise Time (tr) Maximum VCEsat Minimum DS Breakdown Voltage Terminal Form Package Shape Operating Mode No. of Elements Maximum Fall Time (tf) No. of Terminals Package Style (Meter) Sub-Category Field Effect Transistor Technology Maximum Power Dissipation Ambient Minimum DC Current Gain (hFE) Maximum Operating Temperature Maximum Collector-Base Capacitance Transistor Element Material Maximum Collector-Emitter Voltage Maximum Turn On Time (ton) Minimum Operating Temperature Maximum Turn Off Time (toff) Terminal Finish Maximum Drain-Source On Resistance Maximum Drain Current (ID) Terminal Position JESD-30 Code Moisture Sensitivity Level (MSL) Case Connection Qualification Additional Features JEDEC-95 Code JESD-609 Code Maximum Time At Peak Reflow Temperature (s) Peak Reflow Temperature (C) Maximum Feedback Capacitance (Crss) Reference Standard

KSA1281YTA

Onsemi

PNP

SINGLE

NO

100 MHz

1 W

2 A

PLASTIC/EPOXY

AMPLIFIER

1.2 V

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

40

150 Cel

40 pF

SILICON

50 V

MATTE TIN

BOTTOM

O-PBCY-T3

TO-92

e3

NZT605

Onsemi

NPN

DARLINGTON

YES

150 MHz

1 W

1.5 A

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

4

SMALL OUTLINE

Other Transistors

300

150 Cel

SILICON

110 V

MATTE TIN

DUAL

R-PDSO-G4

1

COLLECTOR

Not Qualified

e3

30

260

NZT7053

Onsemi

NPN

DARLINGTON

YES

200 MHz

1 W

1.5 A

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

4

SMALL OUTLINE

Other Transistors

1000

150 Cel

SILICON

100 V

MATTE TIN

DUAL

R-PDSO-G4

1

COLLECTOR

Not Qualified

e3

30

260

PZTA06

Onsemi

NPN

SINGLE

YES

100 MHz

1 W

.5 A

PLASTIC/EPOXY

AMPLIFIER

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

Other Transistors

100

150 Cel

SILICON

80 V

MATTE TIN

DUAL

R-PDSO-G3

1

COLLECTOR

Not Qualified

e3

30

260

ZTX657

Diodes Incorporated

NPN

SINGLE

NO

30 MHz

1 W

.5 A

PLASTIC/EPOXY

WIRE

RECTANGULAR

1

3

IN-LINE

Other Transistors

50

200 Cel

SILICON

300 V

MATTE TIN

SINGLE

R-PSIP-W3

Not Qualified

e3

30

260

2N1048B

Texas Instruments

NPN

SINGLE

NO

.125 MHz

1 W

.75 A

METAL

SWITCHING

WIRE

ROUND

1

3

POST/STUD MOUNT

Other Transistors

12

200 Cel

SILICON

BOTTOM

O-MBPM-W3

COLLECTOR

Not Qualified

TIP541

Texas Instruments

NPN

SINGLE

NO

150 MHz

1 W

2 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

70

175 Cel

SILICON

45 V

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-39

NOT SPECIFIED

NOT SPECIFIED

2N1049A

Texas Instruments

NPN

SINGLE

NO

.075 MHz

1 W

.5 A

METAL

SWITCHING

WIRE

ROUND

1

3

POST/STUD MOUNT

Other Transistors

30

200 Cel

SILICON

BOTTOM

O-MBPM-W3

COLLECTOR

Not Qualified

2N3444

Texas Instruments

NPN

SINGLE

NO

150 MHz

1 W

1 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

15

200 Cel

SILICON

50 V

50 ns

70 ns

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-39

NOT SPECIFIED

NOT SPECIFIED

2N1050

Texas Instruments

NPN

SINGLE

NO

1 W

.5 A

METAL

SWITCHING

WIRE

ROUND

1

3

POST/STUD MOUNT

Other Transistors

30

200 Cel

SILICON

BOTTOM

O-MBPM-W3

COLLECTOR

Not Qualified

2N342

Texas Instruments

NPN

SINGLE

NO

1 W

.06 A

METAL

AMPLIFIER

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

150 Cel

SILICON

60 V

BOTTOM

O-MBCY-W3

ISOLATED

Not Qualified

TO-11

NOT SPECIFIED

NOT SPECIFIED

2N3420

Texas Instruments

NPN

SINGLE

NO

40 MHz

1 W

3 A

METAL

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

15

200 Cel

SILICON

60 V

300 ns

1200 ns

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-5

NOT SPECIFIED

NOT SPECIFIED

2N3468

Texas Instruments

PNP

SINGLE

NO

150 MHz

1 W

1 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

20

200 Cel

SILICON

50 V

40 ns

90 ns

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-39

NOT SPECIFIED

NOT SPECIFIED

TI156L

Texas Instruments

PNP

SINGLE

NO

.22 MHz

1 W

3 A

METAL

SWITCHING

SOLDER LUG

ROUND

1

3

FLANGE MOUNT

Other Transistors

15

100 Cel

GERMANIUM

30 V

UPPER

O-MUFM-D3

COLLECTOR

Not Qualified

NOT SPECIFIED

NOT SPECIFIED

2N3419

Texas Instruments

NPN

SINGLE

NO

40 MHz

1 W

3 A

METAL

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

10

200 Cel

SILICON

80 V

300 ns

1200 ns

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-5

NOT SPECIFIED

NOT SPECIFIED

2N339

Texas Instruments

NPN

SINGLE

NO

1 W

.06 A

METAL

AMPLIFIER

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

150 Cel

SILICON

55 V

BOTTOM

O-MBCY-W3

ISOLATED

Not Qualified

TO-11

NOT SPECIFIED

NOT SPECIFIED

2N5058

Texas Instruments

NPN

SINGLE

NO

30 MHz

1 W

.15 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

35

175 Cel

SILICON

300 V

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-39

NOT SPECIFIED

NOT SPECIFIED

TI486

Texas Instruments

NPN

SINGLE

NO

50 MHz

1 W

1 A

METAL

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

20

175 Cel

SILICON

60 V

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-5

NOT SPECIFIED

NOT SPECIFIED

2N1048

Texas Instruments

NPN

SINGLE

NO

1 W

.5 A

METAL

SWITCHING

WIRE

ROUND

1

3

POST/STUD MOUNT

Other Transistors

12

200 Cel

SILICON

BOTTOM

O-MBPM-W3

COLLECTOR

Not Qualified

2N3252

Texas Instruments

NPN

SINGLE

NO

200 MHz

1 W

1 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

25

175 Cel

SILICON

30 V

45 ns

70 ns

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-39

NOT SPECIFIED

NOT SPECIFIED

2N3421

Texas Instruments

NPN

SINGLE

NO

40 MHz

1 W

3 A

METAL

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

15

200 Cel

SILICON

80 V

300 ns

1200 ns

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-5

NOT SPECIFIED

NOT SPECIFIED

2N1049B

Texas Instruments

NPN

SINGLE

NO

.125 MHz

1 W

.75 A

METAL

SWITCHING

WIRE

ROUND

1

3

POST/STUD MOUNT

Other Transistors

30

200 Cel

SILICON

BOTTOM

O-MBPM-W3

COLLECTOR

Not Qualified

2N1047

Texas Instruments

NPN

SINGLE

NO

1 W

.5 A

METAL

SWITCHING

WIRE

ROUND

1

3

POST/STUD MOUNT

Other Transistors

12

200 Cel

SILICON

BOTTOM

O-MBPM-W3

COLLECTOR

Not Qualified

2N706

Texas Instruments

NPN

SINGLE

NO

200 MHz

1 W

.2 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

20

100 Cel

SILICON

20 V

BOTTOM

O-MBCY-W3

Not Qualified

TO-18

NOT SPECIFIED

NOT SPECIFIED

TIP501

Texas Instruments

NPN

SINGLE

NO

60 MHz

1 W

3 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

25

175 Cel

SILICON

40 V

100 ns

400 ns

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-39

NOT SPECIFIED

NOT SPECIFIED

TIP524

Texas Instruments

PNP

SINGLE

NO

40 MHz

1 W

5 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

5

175 Cel

SILICON

200 V

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-39

NOT SPECIFIED

NOT SPECIFIED

2N3635

Texas Instruments

PNP

SINGLE

NO

200 MHz

1 W

1 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

90

175 Cel

SILICON

140 V

400 ns

600 ns

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-39

NOT SPECIFIED

NOT SPECIFIED

TIP508

Texas Instruments

PNP

SINGLE

NO

50 MHz

1 W

2 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

10

175 Cel

SILICON

150 V

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-39

NOT SPECIFIED

NOT SPECIFIED

2N5333

Texas Instruments

PNP

SINGLE

NO

30 MHz

1 W

2 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

10

175 Cel

SILICON

80 V

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-5

NOT SPECIFIED

NOT SPECIFIED

2N5390

Texas Instruments

NPN

DARLINGTON WITH BUILT-IN DIODE

NO

1 W

2 A

METAL

SWITCHING

WIRE

ROUND

1

4

CYLINDRICAL

Other Transistors

1000

200 Cel

SILICON

80 V

BOTTOM

O-MBCY-W4

COLLECTOR

Not Qualified

TO-33

NOT SPECIFIED

NOT SPECIFIED

2N6464

Texas Instruments

NPN

SINGLE

NO

70 MHz

1 W

.1 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

20

200 Cel

SILICON

250 V

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-39

NOT SPECIFIED

NOT SPECIFIED

2N341

Texas Instruments

NPN

SINGLE

NO

1 W

.06 A

METAL

AMPLIFIER

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

150 Cel

SILICON

85 V

BOTTOM

O-MBCY-W3

ISOLATED

Not Qualified

TO-11

NOT SPECIFIED

NOT SPECIFIED

2N3467

Texas Instruments

PNP

SINGLE

NO

175 MHz

1 W

1 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

40

200 Cel

SILICON

40 V

40 ns

90 ns

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-39

NOT SPECIFIED

NOT SPECIFIED

2N1048A

Texas Instruments

NPN

SINGLE

NO

.075 MHz

1 W

.5 A

METAL

SWITCHING

WIRE

ROUND

1

3

POST/STUD MOUNT

Other Transistors

12

200 Cel

SILICON

BOTTOM

O-MBPM-W3

COLLECTOR

Not Qualified

2N3418

Texas Instruments

NPN

SINGLE

NO

40 MHz

1 W

3 A

METAL

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

10

200 Cel

SILICON

60 V

300 ns

1200 ns

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-5

NOT SPECIFIED

NOT SPECIFIED

TIP522

Texas Instruments

PNP

SINGLE

NO

50 MHz

1 W

2 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

5

175 Cel

SILICON

200 V

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-39

NOT SPECIFIED

NOT SPECIFIED

TIP502

Texas Instruments

NPN

SINGLE

NO

60 MHz

1 W

3 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

25

175 Cel

SILICON

60 V

100 ns

400 ns

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-39

NOT SPECIFIED

NOT SPECIFIED

2N6462

Texas Instruments

NPN

SINGLE

NO

70 MHz

1 W

.1 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

20

200 Cel

SILICON

300 V

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-39

NOT SPECIFIED

NOT SPECIFIED

2N3636

Texas Instruments

PNP

SINGLE

NO

150 MHz

1 W

1 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

45

175 Cel

SILICON

175 V

400 ns

600 ns

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-39

NOT SPECIFIED

NOT SPECIFIED

2N340

Texas Instruments

NPN

SINGLE

NO

1 W

.06 A

METAL

AMPLIFIER

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

150 Cel

SILICON

85 V

BOTTOM

O-MBCY-W3

ISOLATED

Not Qualified

TO-11

NOT SPECIFIED

NOT SPECIFIED

2N1047A

Texas Instruments

NPN

SINGLE

NO

.075 MHz

1 W

.5 A

METAL

SWITCHING

WIRE

ROUND

1

3

POST/STUD MOUNT

Other Transistors

12

200 Cel

SILICON

BOTTOM

O-MBPM-W3

COLLECTOR

Not Qualified

2N1050A

Texas Instruments

NPN

SINGLE

NO

.075 MHz

1 W

.5 A

METAL

SWITCHING

WIRE

ROUND

1

3

POST/STUD MOUNT

Other Transistors

30

200 Cel

SILICON

BOTTOM

O-MBPM-W3

COLLECTOR

Not Qualified

2N6463

Texas Instruments

NPN

SINGLE

NO

70 MHz

1 W

.1 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

20

200 Cel

SILICON

250 V

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-39

NOT SPECIFIED

NOT SPECIFIED

2N744

Texas Instruments

NPN

SINGLE

NO

250 MHz

1 W

.2 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

40

175 Cel

SILICON

12 V

BOTTOM

O-MBCY-W3

Not Qualified

TO-18

NOT SPECIFIED

NOT SPECIFIED

TI156

Texas Instruments

PNP

SINGLE

NO

.22 MHz

1 W

3 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

15

100 Cel

GERMANIUM

30 V

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

NOT SPECIFIED

NOT SPECIFIED

2N3637

Texas Instruments

PNP

SINGLE

NO

200 MHz

1 W

1 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

90

175 Cel

SILICON

175 V

400 ns

600 ns

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-39

NOT SPECIFIED

NOT SPECIFIED

2N3634

Texas Instruments

PNP

SINGLE

NO

150 MHz

1 W

1 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

45

175 Cel

SILICON

140 V

400 ns

600 ns

BOTTOM

O-MBCY-W3

COLLECTOR

Not Qualified

TO-39

NOT SPECIFIED

NOT SPECIFIED

2N1047B

Texas Instruments

NPN

SINGLE

NO

.125 MHz

1 W

.75 A

METAL

SWITCHING

WIRE

ROUND

1

3

POST/STUD MOUNT

Other Transistors

12

200 Cel

SILICON

BOTTOM

O-MBPM-W3

COLLECTOR

Not Qualified

Small Signal Bipolar Junction Transistors (BJT)

Small Signal Bipolar Junction Transistors (BJT) are electronic devices used in low-power applications to amplify and switch small signals. They are commonly used in applications such as audio amplifiers, signal processing, and low-power digital circuits.

Small Signal BJTs are designed to handle low-power levels and operate at low to medium frequencies, typically in the range of a few Hz to several MHz. They have a high gain and low noise figure, making them suitable for small signal amplification.

The Small Signal BJT consists of an emitter, base, and collector region, and works by controlling the flow of majority charge carriers (electrons or holes) between the emitter and collector through the base region. When a voltage is applied to the base-emitter junction, a small current flows through the base, allowing a larger current to flow from the emitter to the collector.

Proper use of Small Signal BJTs is important to ensure optimal performance, reliability, and compatibility with other components in the circuit. Small Signal BJTs are often used in conjunction with other components, such as capacitors and resistors, to form complete low-power electronic circuits.B395