National Semiconductor Small Signal Bipolar Junction Transistors (BJT) 27

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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

BSR14D87Z

National Semiconductor

NPN

SINGLE

YES

300 MHz

.8 A

PLASTIC/EPOXY

AMPLIFIER

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

40

SILICON

40 V

35 ns

285 ns

DUAL

R-PDSO-G3

Not Qualified

TO-236AB

2SC1815

National Semiconductor

NPN

SINGLE

NO

80 MHz

.4 W

.15 A

PLASTIC/EPOXY

.3 V

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

25

125 Cel

4 pF

SILICON

50 V

Tin/Lead (Sn/Pb)

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

e0

BC639-16D27Z

National Semiconductor

NPN

SINGLE

NO

PLASTIC/EPOXY

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

25

SILICON

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

BC517/D74Z

National Semiconductor

NPN

DARLINGTON

NO

1 A

PLASTIC/EPOXY

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

SILICON

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

BC639-16D74Z

National Semiconductor

NPN

SINGLE

NO

PLASTIC/EPOXY

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

25

SILICON

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

LM194H

National Semiconductor

NPN

SEPARATE, 2 ELEMENTS

NO

.02 A

METAL

AMPLIFIER

WIRE

ROUND

2

6

CYLINDRICAL

Other Transistors

500

125 Cel

SILICON

35 V

TIN LEAD

BOTTOM

O-MBCY-W6

Not Qualified

LOW NOISE

TO-99

e0

2SA1015

National Semiconductor

PNP

SINGLE

NO

80 MHz

.4 W

.15 A

PLASTIC/EPOXY

.3 V

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

25

125 Cel

7 pF

SILICON

50 V

Tin/Lead (Sn/Pb)

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

e0

BSR17AD87Z

National Semiconductor

NPN

SINGLE

YES

300 MHz

.2 A

PLASTIC/EPOXY

AMPLIFIER

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

30

SILICON

40 V

70 ns

250 ns

DUAL

R-PDSO-G3

Not Qualified

TO-236AB

MPSA56D27Z

National Semiconductor

PNP

SINGLE

NO

50 MHz

.5 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

100

SILICON

80 V

BOTTOM

O-PBCY-T3

Not Qualified

HIGH CURRENT DRIVER

TO-92

DS2003TMTX/NOPB

National Semiconductor

NPN

COMPLEX

YES

.5 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

7

16

SMALL OUTLINE

SILICON

55 V

Matte Tin (Sn)

DUAL

R-PDSO-G16

1

Not Qualified

LOGIC LEVEL COMPATIBLE

e3

40

260

BF494D27Z

National Semiconductor

NPN

SINGLE

NO

PLASTIC/EPOXY

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

65

SILICON

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

2N3903/D26Z

National Semiconductor

NPN

SINGLE

NO

250 MHz

.2 A

PLASTIC/EPOXY

SWITCHING

.2 V

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

50

SILICON

40 V

70 ns

225 ns

BOTTOM

O-PBCY-T3

Not Qualified

HIGH SPEED SATURATED SWITCHING

TO-92

MMBT5401/D87Z

National Semiconductor

PNP

SINGLE

YES

100 MHz

.2 A

PLASTIC/EPOXY

SWITCHING

.5 V

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

.35 W

50

150 Cel

6 pF

SILICON

150 V

DUAL

R-PDSO-G3

Not Qualified

TO-236AB

2N3859A/D75Z

National Semiconductor

NPN

SINGLE

NO

90 MHz

.1 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

100

SILICON

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

TN6725AD74Z

National Semiconductor

NPN

DARLINGTON

NO

PLASTIC/EPOXY

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

10000

SILICON

BOTTOM

O-PBCY-T3

Not Qualified

TO-226AE

BC846C

National Semiconductor

NPN

SINGLE

YES

300 MHz

PLASTIC/EPOXY

AMPLIFIER

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

110

SILICON

65 V

DUAL

R-PDSO-G3

Not Qualified

LOW NOISE

TO-236AB

BF494D74Z

National Semiconductor

NPN

SINGLE

NO

PLASTIC/EPOXY

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

65

SILICON

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

PN4249/D74Z

National Semiconductor

PNP

SINGLE

NO

40 MHz

.1 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

100

SILICON

BOTTOM

O-PBCY-T3

Not Qualified

LOW NOISE

TO-92

DS2003TMT/NOPB

National Semiconductor

NPN

COMPLEX

YES

.5 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

7

16

SMALL OUTLINE

SILICON

55 V

Matte Tin (Sn)

DUAL

R-PDSO-G16

1

Not Qualified

LOGIC LEVEL COMPATIBLE

e3

40

260

2N3640

National Semiconductor

PNP

SINGLE

NO

300 MHz

.2 W

.08 A

PLASTIC/EPOXY

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

20

125 Cel

SILICON

75 ns

TIN LEAD

BOTTOM

O-PBCY-W3

Not Qualified

TO-92

e0

2N6718

National Semiconductor

NPN

SINGLE

NO

50 MHz

2 W

1 A

PLASTIC/EPOXY

AMPLIFIER

.35 V

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

50

150 Cel

SILICON

100 V

TIN LEAD

BOTTOM

O-PBCY-T3

Not Qualified

HIGH CURRENT DRIVER

TO-237AA

e0

2N3072

National Semiconductor

PNP

SINGLE

NO

130 MHz

.8 W

.5 A

METAL

SWITCHING

WIRE

ROUND

1

3

CYLINDRICAL

Other Transistors

15

200 Cel

SILICON

100 ns

TIN LEAD

BOTTOM

O-MBCY-W3

Not Qualified

TO-5

e0

2N5961

National Semiconductor

NPN

SINGLE

NO

100 MHz

.625 W

.05 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

150

150 Cel

SILICON

60 V

Tin/Lead (Sn/Pb)

BOTTOM

O-PBCY-T3

Not Qualified

LOW NOISE

TO-92

e0

MMBT4123

National Semiconductor

NPN

SINGLE

YES

250 MHz

.225 W

.2 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

Other Transistors

50

150 Cel

SILICON

30 V

TIN LEAD

DUAL

R-PDSO-G3

Not Qualified

TO-236AB

e0

NSD106

National Semiconductor

NPN

SINGLE

NO

60 MHz

10 W

1 A

PLASTIC/EPOXY

THROUGH-HOLE

RECTANGULAR

1

3

FLANGE MOUNT

Other Transistors

25

140 Cel

SILICON

TIN LEAD

SINGLE

R-PSFM-T3

Not Qualified

TO-202

e0

PN2484D27Z

National Semiconductor

NPN

SINGLE

NO

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

250

SILICON

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

PN3566

National Semiconductor

NPN

SINGLE

NO

40 MHz

.6 W

.2 A

PLASTIC/EPOXY

SWITCHING

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

Other Transistors

150

150 Cel

SILICON

30 V

Tin/Lead (Sn/Pb)

BOTTOM

O-PBCY-T3

Not Qualified

TO-92

e0

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