.35 W Small Signal Bipolar Junction Transistors (BJT) 542

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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

2N3043

Texas Instruments

NPN

SEPARATE, 2 ELEMENTS

YES

30 MHz

.35 W

.03 A

METAL

AMPLIFIER

FLAT

RECTANGULAR

2

6

FLATPACK

Other Transistors

130

200 Cel

SILICON

45 V

DUAL

R-MDFP-F6

ISOLATED

Not Qualified

LOW NOISE

NOT SPECIFIED

NOT SPECIFIED

2N3051

Texas Instruments

PNP

SEPARATE, 2 ELEMENTS

YES

60 MHz

.35 W

.1 A

METAL

AMPLIFIER

FLAT

RECTANGULAR

2

6

FLATPACK

Other Transistors

20

200 Cel

SILICON

20 V

35 ns

150 ns

DUAL

R-MDFP-F6

ISOLATED

Not Qualified

LOW NOISE

NOT SPECIFIED

NOT SPECIFIED

2N3047

Texas Instruments

NPN

SEPARATE, 2 ELEMENTS

YES

30 MHz

.35 W

.03 A

METAL

AMPLIFIER

FLAT

RECTANGULAR

2

6

FLATPACK

Other Transistors

65

200 Cel

SILICON

45 V

DUAL

R-MDFP-F6

ISOLATED

Not Qualified

LOW NOISE

NOT SPECIFIED

NOT SPECIFIED

2N3050

Texas Instruments

PNP

SEPARATE, 2 ELEMENTS

YES

60 MHz

.35 W

.1 A

METAL

AMPLIFIER

FLAT

RECTANGULAR

2

6

FLATPACK

Other Transistors

20

200 Cel

SILICON

20 V

DUAL

R-MDFP-F6

ISOLATED

Not Qualified

LOW NOISE

NOT SPECIFIED

NOT SPECIFIED

2N3048

Texas Instruments

NPN

SEPARATE, 2 ELEMENTS

YES

30 MHz

.35 W

.03 A

METAL

AMPLIFIER

FLAT

RECTANGULAR

2

6

FLATPACK

Other Transistors

65

200 Cel

SILICON

45 V

DUAL

R-MDFP-F6

ISOLATED

Not Qualified

LOW NOISE

NOT SPECIFIED

NOT SPECIFIED

2N4402

Texas Instruments

PNP

SINGLE

NO

150 MHz

.35 W

.6 A

PLASTIC/EPOXY

AMPLIFIER

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

30

150 Cel

SILICON

40 V

35 ns

255 ns

BOTTOM

O-PBCY-W3

Not Qualified

TO-92

NOT SPECIFIED

NOT SPECIFIED

2N3052

Texas Instruments

NPN

SEPARATE, 2 ELEMENTS

YES

200 MHz

.35 W

.2 A

METAL

FLAT

RECTANGULAR

2

6

FLATPACK

Other Transistors

25

200 Cel

SILICON

15 V

62 ns

55 ns

DUAL

R-MDFP-F6

ISOLATED

Not Qualified

NOT SPECIFIED

NOT SPECIFIED

2N3045

Texas Instruments

NPN

SEPARATE, 2 ELEMENTS

YES

30 MHz

.35 W

.03 A

METAL

AMPLIFIER

FLAT

RECTANGULAR

2

6

FLATPACK

Other Transistors

130

200 Cel

SILICON

45 V

DUAL

R-MDFP-F6

ISOLATED

Not Qualified

LOW NOISE

NOT SPECIFIED

NOT SPECIFIED

2N3044

Texas Instruments

NPN

SEPARATE, 2 ELEMENTS

YES

30 MHz

.35 W

.03 A

METAL

AMPLIFIER

FLAT

RECTANGULAR

2

6

FLATPACK

Other Transistors

130

200 Cel

SILICON

45 V

DUAL

R-MDFP-F6

ISOLATED

Not Qualified

LOW NOISE

NOT SPECIFIED

NOT SPECIFIED

2N3049

Texas Instruments

PNP

SEPARATE, 2 ELEMENTS

YES

60 MHz

.35 W

.1 A

METAL

AMPLIFIER

FLAT

RECTANGULAR

2

6

FLATPACK

Other Transistors

20

200 Cel

SILICON

20 V

DUAL

R-MDFP-F6

ISOLATED

Not Qualified

LOW NOISE

NOT SPECIFIED

NOT SPECIFIED

2N3046

Texas Instruments

NPN

SEPARATE, 2 ELEMENTS

YES

30 MHz

.35 W

.03 A

METAL

AMPLIFIER

FLAT

RECTANGULAR

2

6

FLATPACK

Other Transistors

65

200 Cel

SILICON

45 V

DUAL

R-MDFP-F6

ISOLATED

Not Qualified

LOW NOISE

NOT SPECIFIED

NOT SPECIFIED

2N4123RLRM

Onsemi

NPN

SINGLE

NO

250 MHz

.35 W

.2 A

PLASTIC/EPOXY

SWITCHING

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

25

150 Cel

SILICON

30 V

TIN LEAD

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

e0

235

2N4124G

Onsemi

NPN

SINGLE

NO

300 MHz

.35 W

.2 A

PLASTIC/EPOXY

SWITCHING

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

60

150 Cel

SILICON

25 V

TIN SILVER COPPER

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

e1

260

2N4123RLRA

Onsemi

NPN

SINGLE

NO

250 MHz

.35 W

.2 A

PLASTIC/EPOXY

SWITCHING

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

25

150 Cel

SILICON

30 V

TIN LEAD

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

e0

235

KST2484

Onsemi

NPN

SINGLE

YES

.35 W

.05 A

PLASTIC/EPOXY

.35 V

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

.35 W

250

6 pF

SILICON

60 V

DUAL

R-PDSO-G3

LOW NOISE

2N5551ZL1

Onsemi

NPN

SINGLE

NO

100 MHz

.35 W

.6 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

30

150 Cel

SILICON

160 V

TIN LEAD

BOTTOM

O-PBCY-T3

Not Qualified

EUROPEAN PART NUMBER

TO-92

e0

235

2N3906RLRM

Onsemi

PNP

SINGLE

NO

250 MHz

.35 W

.2 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

30

150 Cel

SILICON

40 V

70 ns

300 ns

TIN LEAD

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

e0

235

2N5551RL1

Onsemi

NPN

SINGLE

NO

100 MHz

.35 W

.6 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

30

150 Cel

SILICON

160 V

TIN LEAD

BOTTOM

O-PBCY-T3

Not Qualified

EUROPEAN PART NUMBER

TO-92

e0

235

2N3906ZL1G

Onsemi

PNP

SINGLE

NO

250 MHz

.35 W

.2 A

PLASTIC/EPOXY

SWITCHING

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

30

150 Cel

SILICON

40 V

70 ns

300 ns

TIN SILVER COPPER

BOTTOM

O-PBCY-T3

Not Qualified

EUROPEAN PART NUMBER

TO-92

e1

260

BC172

Onsemi

NPN

SINGLE

NO

150 MHz

.35 W

.1 A

PLASTIC/EPOXY

AMPLIFIER

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

125

125 Cel

SILICON

25 V

BOTTOM

O-PBCY-W3

Not Qualified

TO-92

BC308C

Onsemi

PNP

SINGLE

NO

320 MHz

.35 W

.1 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

420

150 Cel

SILICON

25 V

TIN LEAD

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

e0

235

MPS2713

Onsemi

NPN

SINGLE

NO

250 MHz

.35 W

.1 A

PLASTIC/EPOXY

AMPLIFIER

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

30

135 Cel

SILICON

18 V

BOTTOM

O-PBCY-W3

Not Qualified

TO-92

KST5550MTF

Onsemi

NPN

SINGLE

YES

100 MHz

.35 W

.6 A

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

Other Transistors

20

150 Cel

SILICON

140 V

TIN

DUAL

R-PDSO-G3

1

Not Qualified

e3

30

260

BC212BRL1

Onsemi

PNP

SINGLE

NO

280 MHz

.35 W

.1 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

60

150 Cel

SILICON

50 V

TIN LEAD

BOTTOM

O-PBCY-T3

Not Qualified

EUROPEAN PART NUMBER

TO-226AA

e0

235

2N5400RLRP

Onsemi

PNP

SINGLE

NO

100 MHz

.35 W

.6 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

40

150 Cel

SILICON

120 V

TIN LEAD

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

e0

235

NUS2401SNT1G

Onsemi

NPN AND PNP

COMPLEX

YES

.35 W

.2 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

3

6

SMALL OUTLINE

Other Transistors

150

150 Cel

SILICON

50 V

MATTE TIN

DUAL

R-PDSO-G6

1

Not Qualified

BUILT IN BIAS RESISTORS

e3

30

260

2N5551ZL1G

Onsemi

NPN

SINGLE

NO

100 MHz

.35 W

.6 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

30

150 Cel

SILICON

160 V

TIN SILVER COPPER

BOTTOM

O-PBCY-T3

Not Qualified

EUROPEAN PART NUMBER

TO-92

e1

260

DTB113ERLRM

Onsemi

PNP

NO

.35 W

.1 A

1

BIP General Purpose Small Signal

3

SILICON

TIN LEAD

e0

235

KST06MTF

Onsemi

NPN

SINGLE

YES

100 MHz

.35 W

.5 A

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

Other Transistors

50

150 Cel

SILICON

80 V

TIN

DUAL

R-PDSO-G3

1

Not Qualified

e3

30

260

BC237G

Onsemi

NPN

SINGLE

NO

200 MHz

.35 W

.1 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

200

150 Cel

SILICON

45 V

TIN SILVER COPPER

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

e1

260

BC307BRL1

Onsemi

PNP

SINGLE

NO

280 MHz

.35 W

.1 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

200

150 Cel

SILICON

45 V

TIN LEAD

BOTTOM

O-PBCY-T3

Not Qualified

EUROPEAN PART NUMBER

TO-92

e0

235

BC237BRL1

Onsemi

NPN

SINGLE

NO

200 MHz

.35 W

.1 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

200

150 Cel

SILICON

45 V

TIN LEAD

BOTTOM

O-PBCY-T3

Not Qualified

EUROPEAN PART NUMBER

TO-92

e0

235

2N5551RLRAG

Onsemi

NPN

SINGLE

NO

100 MHz

.35 W

.6 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

30

150 Cel

SILICON

160 V

TIN SILVER COPPER

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

e1

260

2N5551RLRA

Onsemi

NPN

SINGLE

NO

100 MHz

.35 W

.6 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

30

150 Cel

SILICON

160 V

TIN LEAD

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

e0

235

2N3906RLRP

Onsemi

PNP

SINGLE

NO

250 MHz

.35 W

.2 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

30

150 Cel

SILICON

40 V

70 ns

300 ns

TIN LEAD

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

e0

235

FJX3904TF

Onsemi

NPN

SINGLE

YES

300 MHz

.35 W

.2 A

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

Other Transistors

30

SILICON

40 V

70 ns

250 ns

TIN

DUAL

R-PDSO-G3

1

Not Qualified

e3

30

260

BC171

Onsemi

NPN

SINGLE

NO

150 MHz

.35 W

.1 A

PLASTIC/EPOXY

AMPLIFIER

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

125

150 Cel

SILICON

45 V

BOTTOM

O-PBCY-W3

Not Qualified

TO-92

2N5550RLRAG

Onsemi

NPN

SINGLE

NO

100 MHz

.35 W

.6 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

20

150 Cel

SILICON

140 V

TIN SILVER COPPER

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

e1

260

KST13

Onsemi

NPN

DARLINGTON

YES

125 MHz

.35 W

.3 A

PLASTIC/EPOXY

AMPLIFIER

1.5 V

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

10000

SILICON

30 V

DUAL

R-PDSO-G3

KST2222AMTF

Onsemi

NPN

SINGLE

YES

300 MHz

.35 W

.6 A

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

Other Transistors

40

SILICON

40 V

35 ns

285 ns

TIN

DUAL

R-PDSO-G3

1

Not Qualified

e3

30

260

2N3906RL1

Onsemi

PNP

SINGLE

NO

250 MHz

.35 W

.2 A

PLASTIC/EPOXY

SWITCHING

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

30

150 Cel

SILICON

40 V

70 ns

300 ns

TIN LEAD

BOTTOM

O-PBCY-T3

Not Qualified

EUROPEAN PART NUMBER

TO-92

e0

235

KST55MTF

Onsemi

PNP

SINGLE

YES

50 MHz

.35 W

.5 A

PLASTIC/EPOXY

AMPLIFIER

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

Other Transistors

50

SILICON

60 V

TIN

DUAL

R-PDSO-G3

1

Not Qualified

e3

30

260

2N5400G

Onsemi

PNP

SINGLE

NO

100 MHz

.35 W

.6 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

40

150 Cel

SILICON

120 V

TIN SILVER COPPER

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

e1

260

MPS9632

Onsemi

NPN

SINGLE

NO

.35 W

.1 A

PLASTIC/EPOXY

AMPLIFIER

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

45

SILICON

30 V

BOTTOM

O-PBCY-W3

Not Qualified

TO-92

2N5550RLRP

Onsemi

NPN

SINGLE

NO

100 MHz

.35 W

.6 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

20

150 Cel

SILICON

140 V

TIN LEAD

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

e0

235

DTB113ERLRA

Onsemi

PNP

NO

.35 W

.1 A

1

BIP General Purpose Small Signal

3

SILICON

TIN LEAD

e0

235

MPSD56

Onsemi

PNP

SINGLE

NO

100 MHz

.35 W

.05 A

PLASTIC/EPOXY

AMPLIFIER

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

50

150 Cel

SILICON

25 V

BOTTOM

O-PBCY-W3

Not Qualified

TO-92

MPSD06

Onsemi

NPN

SINGLE

NO

100 MHz

.35 W

.05 A

PLASTIC/EPOXY

AMPLIFIER

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

50

150 Cel

SILICON

25 V

BOTTOM

O-PBCY-W3

Not Qualified

TO-92

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