SINGLE WITH BUILT-IN RESISTOR Small Signal Bipolar Junction Transistors (BJT) 2,400+

Reset All
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

PDTC115EEF

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

.25 W

.1 A

PLASTIC/EPOXY

SWITCHING

FLAT

RECTANGULAR

1

3

SMALL OUTLINE

BIP General Purpose Small Signal

80

SILICON

50 V

TIN

DUAL

R-PDSO-F3

Not Qualified

BUILT IN BIAS RESISTANCE RATIO IS 1

e3

PDTC144EKT/R

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

.25 W

.1 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

BIP General Purpose Small Signal

80

SILICON

50 V

MATTE TIN

DUAL

R-PDSO-G3

Not Qualified

BUILT IN BIAS RESISTANCE RATIO IS 1

TO-236

e3

260

PDTC114TM,315

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

.25 W

.1 A

PLASTIC/EPOXY

SWITCHING

NO LEAD

RECTANGULAR

1

3

CHIP CARRIER

BIP General Purpose Small Signal

200

150 Cel

SILICON

50 V

TIN

BOTTOM

R-PBCC-N3

1

COLLECTOR

Not Qualified

BUILT-IN BIAS RESISTOR

e3

30

260

PDTA144EET/R

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.1 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

80

SILICON

50 V

TIN

DUAL

R-PDSO-G3

Not Qualified

BUILT-IN BIAS RESISTOR RATIO 1

e3

PDTC143TT/T3

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

.1 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

200

SILICON

50 V

TIN

DUAL

R-PDSO-G3

Not Qualified

BUILT-IN BIAS RESISTORS

TO-236AB

e3

PDTA115EK

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.25 W

.02 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

BIP General Purpose Small Signal

80

SILICON

50 V

MATTE TIN

DUAL

R-PDSO-G3

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 1

TO-236

e3

260

PDTA114ET

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

100 MHz

.25 W

.1 A

PLASTIC/EPOXY

SWITCHING

.3 V

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

BIP General Purpose Small Signal

30

150 Cel

5 pF

SILICON

50 V

Tin (Sn)

DUAL

R-PDSO-G3

1

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 1

TO-236AB

e3

30

260

PDTC123TMB

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

230 MHz

.1 A

PLASTIC/EPOXY

SWITCHING

NO LEAD

RECTANGULAR

1

3

CHIP CARRIER

30

SILICON

50 V

TIN

BOTTOM

R-PBCC-N3

1

COLLECTOR

BUILT IN BIAS RESISTOR

e3

AEC-Q101; IEC-60134

PDTA143XKT/R

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.1 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

50

SILICON

50 V

TIN

DUAL

R-PDSO-G3

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 2.1

TO-236AB

e3

PDTC143ZM,315

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

.25 W

.1 A

PLASTIC/EPOXY

SWITCHING

NO LEAD

RECTANGULAR

1

3

CHIP CARRIER

BIP General Purpose Small Signal

100

150 Cel

SILICON

50 V

TIN

BOTTOM

R-PBCC-N3

1

COLLECTOR

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 10

e3

30

260

PDTA114TS,126

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

NO

.1 A

PLASTIC/EPOXY

SWITCHING

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

100

150 Cel

SILICON

50 V

TIN

BOTTOM

O-PBCY-T3

NOT APPLICABLE

Not Qualified

BUILT-IN BIAS RESISTOR

TO-92

e3

NOT SPECIFIED

NOT SPECIFIED

PDTA114ET-T

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

100 MHz

.1 A

PLASTIC/EPOXY

SWITCHING

.3 V

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

30

150 Cel

5 pF

SILICON

50 V

TIN

DUAL

R-PDSO-G3

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 1

TO-236AB

e3

PDTC144WU

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

.2 W

.1 A

PLASTIC/EPOXY

SWITCHING

.3 V

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

BIP General Purpose Small Signal

.2 W

60

150 Cel

3.5 pF

SILICON

50 V

Tin (Sn)

DUAL

R-PDSO-G3

1

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 0.47

e3

30

260

PDTC115TE,115

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

.15 W

.1 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

BIP General Purpose Small Signal

100

150 Cel

SILICON

50 V

TIN

DUAL

R-PDSO-G3

1

Not Qualified

BUILT IN BIAS RESISTOR

e3

30

260

PDTA143ZEF

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.1 A

PLASTIC/EPOXY

SWITCHING

FLAT

RECTANGULAR

1

3

SMALL OUTLINE

100

SILICON

50 V

TIN

DUAL

R-PDSO-F3

Not Qualified

BUILT-IN BIAS RESISTOR RATIO 10

e3

PDTC114YEF,115

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

.1 A

PLASTIC/EPOXY

SWITCHING

FLAT

RECTANGULAR

1

3

SMALL OUTLINE

100

150 Cel

SILICON

50 V

TIN

DUAL

R-PDSO-F3

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 4.7

e3

PDTC144TT

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

.25 W

.1 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

BIP General Purpose Small Signal

100

150 Cel

SILICON

50 V

Tin (Sn)

DUAL

R-PDSO-G3

1

Not Qualified

BUILT-IN BIAS RESISTOR

TO-236AB

e3

30

260

PDTA114TM,315

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.25 W

.1 A

PLASTIC/EPOXY

SWITCHING

NO LEAD

RECTANGULAR

1

3

CHIP CARRIER

BIP General Purpose Small Signal

200

150 Cel

SILICON

50 V

TIN

BOTTOM

R-PBCC-N3

1

COLLECTOR

Not Qualified

BUILT IN BIAS RESISTOR

e3

30

260

PDTC143XM,315

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

.25 W

.1 A

PLASTIC/EPOXY

SWITCHING

NO LEAD

RECTANGULAR

1

3

CHIP CARRIER

BIP General Purpose Small Signal

50

150 Cel

SILICON

50 V

TIN

BOTTOM

R-PBCC-N3

1

COLLECTOR

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 2.1

e3

30

260

PDTC114TS,126

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

NO

.1 A

PLASTIC/EPOXY

SWITCHING

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

100

150 Cel

SILICON

50 V

TIN

BOTTOM

O-PBCY-T3

NOT APPLICABLE

Not Qualified

BUILT IN BIAS RESISTOR

TO-92

e3

NOT SPECIFIED

NOT SPECIFIED

PDTA124TE

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.15 W

.1 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

BIP General Purpose Small Signal

100

150 Cel

SILICON

50 V

Tin (Sn)

DUAL

R-PDSO-G3

1

Not Qualified

BUILT-IN BIAS RESISTORS

e3

30

260

PDTC143TTT/R

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

.1 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

200

SILICON

50 V

TIN

DUAL

R-PDSO-G3

Not Qualified

BUILT-IN BIAS RESISTORS

TO-236AB

e3

PDTA124XS

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

NO

.5 W

.1 A

PLASTIC/EPOXY

SWITCHING

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

BIP General Purpose Small Signal

80

SILICON

50 V

MATTE TIN

BOTTOM

O-PBCY-T3

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 2.1

TO-92

e3

PDTA114TM

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.25 W

.1 A

PLASTIC/EPOXY

SWITCHING

NO LEAD

RECTANGULAR

1

3

CHIP CARRIER

BIP General Purpose Small Signal

200

150 Cel

SILICON

50 V

Tin (Sn)

BOTTOM

R-PBCC-N3

1

COLLECTOR

Not Qualified

BUILT IN BIAS RESISTOR

e3

30

260

PBRN113ZT

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

.8 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

300

150 Cel

SILICON

40 V

Tin (Sn)

DUAL

R-PDSO-G3

1

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 10

TO-236AB

e3

30

260

PDTC323TK,115

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

.5 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

100

150 Cel

SILICON

15 V

DUAL

R-PDSO-G3

Not Qualified

BUILT-IN BIAS RESISTOR

TO-236

PDTA143ZK

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.25 W

.1 A

PLASTIC/EPOXY

SWITCHING

.3 V

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

BIP General Purpose Small Signal

.25 W

100

150 Cel

5 pF

SILICON

50 V

TIN

DUAL

R-PDSO-G3

Not Qualified

BUILT-IN BIAS RESISTOR RATIO 10

TO-236

e3

PDTA143ZTT/R

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.1 A

PLASTIC/EPOXY

SWITCHING

.3 V

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

.25 W

100

150 Cel

5 pF

SILICON

50 V

TIN

DUAL

R-PDSO-G3

Not Qualified

BUILT-IN BIAS RESISTOR RATIO 10

TO-263AB

e3

PDTA123ETT/R

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.1 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

30

SILICON

50 V

TIN

DUAL

R-PDSO-G3

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 1

TO-236AB

e3

PDTA124XE

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.15 W

.1 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

BIP General Purpose Small Signal

80

150 Cel

SILICON

50 V

Tin (Sn)

DUAL

R-PDSO-G3

1

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 2.1

e3

30

260

PDTC123JM

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

.25 W

.1 A

PLASTIC/EPOXY

SWITCHING

NO LEAD

RECTANGULAR

1

3

CHIP CARRIER

BIP General Purpose Small Signal

100

150 Cel

SILICON

50 V

Tin (Sn)

BOTTOM

R-PBCC-N3

1

COLLECTOR

Not Qualified

BUILT IN BIAS RESISTANCE RATIO IS 21

e3

30

260

PDTA114TU

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.2 W

.1 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

BIP General Purpose Small Signal

200

150 Cel

SILICON

50 V

Tin (Sn)

DUAL

R-PDSO-G3

1

Not Qualified

BUILT IN BIAS RESISTOR

e3

30

260

PDTA143ZEF,115

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.1 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

100

150 Cel

SILICON

50 V

TIN

DUAL

R-PDSO-G3

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 10

e3

PDTC123JM,315

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

.25 W

.1 A

PLASTIC/EPOXY

SWITCHING

NO LEAD

RECTANGULAR

1

3

CHIP CARRIER

BIP General Purpose Small Signal

100

150 Cel

SILICON

50 V

TIN

BOTTOM

R-PBCC-N3

1

COLLECTOR

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 21.36

e3

30

260

PDTA124ET/T4

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

100 MHz

.1 A

PLASTIC/EPOXY

SWITCHING

.3 V

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

60

150 Cel

5 pF

SILICON

50 V

DUAL

R-PDSO-G3

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 1

TO-236AB

PDTA143EEF

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.25 W

.1 A

PLASTIC/EPOXY

SWITCHING

FLAT

RECTANGULAR

1

3

SMALL OUTLINE

BIP General Purpose Small Signal

30

SILICON

50 V

TIN

DUAL

R-PDSO-F3

Not Qualified

BUILT-IN BIAS RESISTOR RATIO 1

e3

PBRN123ET

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

.57 W

.6 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

Other Transistors

340

150 Cel

SILICON

40 V

Tin (Sn)

DUAL

R-PDSO-G3

1

Not Qualified

BUILT-IN BIAS RESISTOR RATIO 1

TO-236AB

e3

30

260

PDTA114YEF,115

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.1 A

PLASTIC/EPOXY

SWITCHING

FLAT

RECTANGULAR

1

3

SMALL OUTLINE

100

150 Cel

SILICON

50 V

TIN

DUAL

R-PDSO-F3

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 4.7

e3

NOT SPECIFIED

NOT SPECIFIED

PDTA143EM,315

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.25 W

.1 A

PLASTIC/EPOXY

SWITCHING

NO LEAD

RECTANGULAR

1

3

CHIP CARRIER

BIP General Purpose Small Signal

30

150 Cel

SILICON

50 V

TIN

BOTTOM

R-PBCC-N3

1

COLLECTOR

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 1

e3

30

260

PDTA143ZS

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

NO

.5 W

.1 A

PLASTIC/EPOXY

SWITCHING

THROUGH-HOLE

ROUND

1

3

CYLINDRICAL

BIP General Purpose Small Signal

100

SILICON

50 V

TIN

BOTTOM

O-PBCY-T3

Not Qualified

BUILT-IN BIAS RESISTOR RATIO 10

TO-92

e3

PDTA144ET-T

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

100 MHz

.1 A

PLASTIC/EPOXY

SWITCHING

.3 V

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

80

150 Cel

5 pF

SILICON

50 V

TIN

DUAL

R-PDSO-G3

Not Qualified

BUILT-IN BIAS RESISTOR RATIO 1

TO-263AB

e3

PDTA114EU

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.2 W

.1 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

BIP General Purpose Small Signal

30

150 Cel

SILICON

50 V

Tin (Sn)

DUAL

R-PDSO-G3

1

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 1

e3

30

260

PDTA123EU,115

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.2 W

.1 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

BIP General Purpose Small Signal

30

150 Cel

SILICON

50 V

TIN

DUAL

R-PDSO-G3

1

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 1

e3

30

260

PDTA124XMB

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

180 MHz

.1 A

PLASTIC/EPOXY

SWITCHING

NO LEAD

RECTANGULAR

1

3

CHIP CARRIER

80

SILICON

50 V

TIN

BOTTOM

R-PBCC-N3

1

COLLECTOR

BUILT IN BIAS RESISTANCE RATIO IS 2.1

e3

AEC-Q101; IEC-60134

PDTA143XEF

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.25 W

.1 A

PLASTIC/EPOXY

SWITCHING

FLAT

RECTANGULAR

1

3

SMALL OUTLINE

BIP General Purpose Small Signal

50

SILICON

50 V

TIN

DUAL

R-PDSO-F3

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 2.13

e3

PDTC143TE,115

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

.15 W

.1 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

BIP General Purpose Small Signals

200

150 Cel

SILICON

50 V

TIN

DUAL

R-PDSO-G3

1

Not Qualified

BUILT-IN BIAS RESISTOR

e3

30

260

PDTA115EE,115

NXP Semiconductors

PNP

SINGLE WITH BUILT-IN RESISTOR

YES

.15 W

.02 A

PLASTIC/EPOXY

SWITCHING

GULL WING

RECTANGULAR

1

3

SMALL OUTLINE

BIP General Purpose Small Signal

80

150 Cel

SILICON

50 V

TIN

DUAL

R-PDSO-G3

1

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 1

e3

30

260

PDTC124XEF,115

NXP Semiconductors

NPN

SINGLE WITH BUILT-IN RESISTOR

YES

.1 A

PLASTIC/EPOXY

SWITCHING

FLAT

RECTANGULAR

1

3

SMALL OUTLINE

80

150 Cel

SILICON

50 V

TIN

DUAL

R-PDSO-F3

Not Qualified

BUILT-IN BIAS RESISTOR RATIO IS 2.14

e3

NOT SPECIFIED

NOT SPECIFIED

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