3 MHz Small Signal Bipolar Junction Transistors (BJT) 73

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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

BDS949

NXP Semiconductors

NPN

SINGLE

YES

3 MHz

3 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

4

SMALL OUTLINE

20

SILICON

60 V

DUAL

R-PDSO-G4

COLLECTOR

Not Qualified

BDS950-T

NXP Semiconductors

PNP

SINGLE

YES

3 MHz

3 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

4

SMALL OUTLINE

20

SILICON

60 V

DUAL

R-PDSO-G4

COLLECTOR

Not Qualified

BDS951

NXP Semiconductors

NPN

SINGLE

YES

3 MHz

3 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

4

SMALL OUTLINE

20

SILICON

80 V

DUAL

R-PDSO-G4

COLLECTOR

Not Qualified

BDS933-T

NXP Semiconductors

NPN

SINGLE

YES

3 MHz

3 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

4

SMALL OUTLINE

25

SILICON

45 V

1000 ns

3000 ns

DUAL

R-PDSO-G4

COLLECTOR

Not Qualified

BDS954

NXP Semiconductors

PNP

SINGLE

YES

3 MHz

3 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

4

SMALL OUTLINE

20

SILICON

100 V

DUAL

R-PDSO-G4

COLLECTOR

Not Qualified

2SD1221-GR(2-7B2A)

Toshiba

NPN

SINGLE

YES

3 MHz

3 A

PLASTIC/EPOXY

AMPLIFIER

GULL WING

RECTANGULAR

1

2

SMALL OUTLINE

150

150 Cel

SILICON

60 V

SINGLE

R-PSSO-G2

COLLECTOR

Not Qualified

NOT SPECIFIED

NOT SPECIFIED

2SD1221Y(2-7J1A)

Toshiba

NPN

SINGLE

YES

3 MHz

3 A

PLASTIC/EPOXY

AMPLIFIER

GULL WING

RECTANGULAR

1

2

SMALL OUTLINE

100

150 Cel

SILICON

60 V

800 ns

950 ns

SINGLE

R-PSSO-G2

COLLECTOR

Not Qualified

2SD1221(2-7B1A)

Toshiba

NPN

SINGLE

NO

3 MHz

3 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

RECTANGULAR

1

3

IN-LINE

20

150 Cel

SILICON

60 V

SINGLE

R-PSIP-T3

COLLECTOR

Not Qualified

NOT SPECIFIED

NOT SPECIFIED

2SD1221-O(2-7B1A)

Toshiba

NPN

SINGLE

NO

3 MHz

3 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

RECTANGULAR

1

3

FLANGE MOUNT

60

150 Cel

SILICON

60 V

800 ns

950 ns

SINGLE

R-PSFM-T3

COLLECTOR

Not Qualified

2SD1221O

Toshiba

NPN

SINGLE

YES

3 MHz

1 W

3 A

PLASTIC/EPOXY

AMPLIFIER

GULL WING

RECTANGULAR

1

2

SMALL OUTLINE

Other Transistors

60

150 Cel

SILICON

60 V

TIN LEAD

SINGLE

R-PSSO-G2

COLLECTOR

Not Qualified

e0

2SD1221-O(2-7B2A)

Toshiba

NPN

SINGLE

YES

3 MHz

3 A

PLASTIC/EPOXY

AMPLIFIER

GULL WING

RECTANGULAR

1

2

SMALL OUTLINE

60

150 Cel

SILICON

60 V

SINGLE

R-PSSO-G2

COLLECTOR

Not Qualified

NOT SPECIFIED

NOT SPECIFIED

2SD1221(2-7B2A)

Toshiba

NPN

SINGLE

YES

3 MHz

3 A

PLASTIC/EPOXY

AMPLIFIER

GULL WING

RECTANGULAR

1

2

SMALL OUTLINE

20

150 Cel

SILICON

60 V

SINGLE

R-PSSO-G2

COLLECTOR

Not Qualified

NOT SPECIFIED

NOT SPECIFIED

2SD1221GR

Toshiba

NPN

SINGLE

YES

3 MHz

1 W

3 A

PLASTIC/EPOXY

AMPLIFIER

GULL WING

RECTANGULAR

1

2

SMALL OUTLINE

Other Transistors

150

150 Cel

SILICON

60 V

TIN LEAD

SINGLE

R-PSSO-G2

COLLECTOR

Not Qualified

e0

2SD1221Y

Toshiba

NPN

SINGLE

YES

3 MHz

1 W

3 A

PLASTIC/EPOXY

AMPLIFIER

GULL WING

RECTANGULAR

1

2

SMALL OUTLINE

Other Transistors

100

150 Cel

SILICON

60 V

TIN LEAD

SINGLE

R-PSSO-G2

COLLECTOR

Not Qualified

e0

2SD1221GR(2-7J1A)

Toshiba

NPN

SINGLE

YES

3 MHz

3 A

PLASTIC/EPOXY

AMPLIFIER

GULL WING

RECTANGULAR

1

2

SMALL OUTLINE

150

150 Cel

SILICON

60 V

800 ns

950 ns

SINGLE

R-PSSO-G2

COLLECTOR

Not Qualified

2SD1221-Y(2-7B2A)

Toshiba

NPN

SINGLE

YES

3 MHz

3 A

PLASTIC/EPOXY

AMPLIFIER

GULL WING

RECTANGULAR

1

2

SMALL OUTLINE

100

150 Cel

SILICON

60 V

SINGLE

R-PSSO-G2

COLLECTOR

Not Qualified

NOT SPECIFIED

NOT SPECIFIED

2SD1221(2-7J1A)

Toshiba

NPN

SINGLE

YES

3 MHz

3 A

PLASTIC/EPOXY

AMPLIFIER

GULL WING

RECTANGULAR

1

2

SMALL OUTLINE

20

150 Cel

SILICON

60 V

SINGLE

R-PSSO-G2

COLLECTOR

Not Qualified

NOT SPECIFIED

NOT SPECIFIED

2SD1221-GR(2-7B1A)

Toshiba

NPN

SINGLE

NO

3 MHz

3 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

RECTANGULAR

1

3

FLANGE MOUNT

150

150 Cel

SILICON

60 V

800 ns

950 ns

SINGLE

R-PSFM-T3

COLLECTOR

Not Qualified

2SD1221-Y(2-7B1A)

Toshiba

NPN

SINGLE

NO

3 MHz

3 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

RECTANGULAR

1

3

FLANGE MOUNT

100

150 Cel

SILICON

60 V

800 ns

950 ns

SINGLE

R-PSFM-T3

COLLECTOR

Not Qualified

2SD1221O(2-7J1A)

Toshiba

NPN

SINGLE

YES

3 MHz

3 A

PLASTIC/EPOXY

AMPLIFIER

GULL WING

RECTANGULAR

1

2

SMALL OUTLINE

60

150 Cel

SILICON

60 V

800 ns

950 ns

SINGLE

R-PSSO-G2

COLLECTOR

Not Qualified

2SD1221

Toshiba

NPN

SINGLE

YES

3 MHz

1 W

3 A

PLASTIC/EPOXY

AMPLIFIER

GULL WING

RECTANGULAR

1

2

SMALL OUTLINE

Other Transistors

20

150 Cel

SILICON

60 V

SINGLE

R-PSSO-G2

COLLECTOR

Not Qualified

KSD1221-G

Samsung

NPN

SINGLE

NO

3 MHz

3 A

PLASTIC/EPOXY

AMPLIFIER

1 V

THROUGH-HOLE

RECTANGULAR

1

3

IN-LINE

20 W

150

150 Cel

SILICON

60 V

SINGLE

R-PSIP-T3

Not Qualified

KSD1221-Y

Samsung

NPN

SINGLE

NO

3 MHz

3 A

PLASTIC/EPOXY

AMPLIFIER

1 V

THROUGH-HOLE

RECTANGULAR

1

3

IN-LINE

20 W

100

150 Cel

SILICON

60 V

SINGLE

R-PSIP-T3

Not Qualified

KSD1221

Samsung

NPN

SINGLE

NO

3 MHz

20 W

3 A

PLASTIC/EPOXY

AMPLIFIER

THROUGH-HOLE

RECTANGULAR

1

3

IN-LINE

Other Transistors

60

150 Cel

SILICON

SINGLE

R-PSIP-T3

Not Qualified

KSD1221-O

Samsung

NPN

SINGLE

NO

3 MHz

3 A

PLASTIC/EPOXY

AMPLIFIER

1 V

THROUGH-HOLE

RECTANGULAR

1

3

IN-LINE

20 W

60

150 Cel

SILICON

60 V

SINGLE

R-PSIP-T3

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