BC560 PNP Transistor Technical Summary

Overview

The BC560 is a general-purpose PNP bipolar junction transistor (BJT) housed in a TO-92 (SOT54) plastic package. Designed for low-power amplification and switching applications, this transistor is characterized by its low current and voltage ratings, making it suitable for a variety of electronic circuits. Its compact form factor and reliable performance have made it a popular choice among designers and hobbyists alike.

The BC560 is part of a family of complementary transistors, often paired with NPN counterparts like the BC550, to provide symmetrical circuit design options. Its performance characteristics are optimized for use in audio amplifiers, signal processing, and other low-power applications where efficiency and stability are critical.

Features

• Polarity: PNP (Positive-Negative-Positive)
• Package Type: TO-92 (SOT54) plastic package
• Maximum Collector Current (Ic): 100 mA
• Maximum Collector-Emitter Voltage (Vce): 45 V
• Maximum Power Dissipation (Pd): Typically 500 mW
• Transition Frequency (ft): Typically 150 MHz
• DC Current Gain (hFE): Ranges from 110 to 800, depending on the variant
• Low Noise: Suitable for audio and signal amplification
• Complementary Pair: Often used with NPN transistors like BC550

Applications

The BC560 is versatile and finds use in a wide range of electronic circuits. Below are some common applications:

• Audio Amplification: Used in pre-amplifiers and low-power audio stages due to its low noise characteristics.
• Signal Processing: Ideal for small-signal amplification in RF and analog circuits.
• Switching Circuits: Suitable for low-power switching applications, such as relay drivers or LED control.
• Oscillators and Timers: Employed in oscillator circuits for generating stable frequencies.
• Complementary Symmetry Circuits: Paired with NPN transistors (e.g., BC550) to create push-pull amplifiers or other symmetrical designs.
• Educational Projects: Frequently used in hobbyist and educational projects due to its ease of use and availability.

Electrical Characteristics

The following tables outline the key electrical specifications of the BC560 transistor under typical operating conditions (unless otherwise noted).

Absolute Maximum Ratings

• Collector-Emitter Voltage (Vce): 45 V
• Collector-Base Voltage (Vcb): 50 V
• Emitter-Base Voltage (Veb): 5 V
• Collector Current (Ic): 100 mA
• Total Power Dissipation (Pd): 500 mW at 25°C
• Operating Junction Temperature (Tj): -55°C to +150°C
• Storage Temperature (Tstg): -55°C to +150°C

Typical Electrical Characteristics (TA = 25°C)

• DC Current Gain (hFE):
  • BC560A: 110 - 220
  • BC560B: 200 - 450
  • BC560C: 420 - 800
• Collector-Emitter Saturation Voltage (Vce(sat)): 0.25 V (Ic = 10 mA, Ib = 1 mA)
• Base-Emitter Saturation Voltage (Vbe(sat)): 0.9 V (Ic = 10 mA, Ib = 1 mA)
• Transition Frequency (ft): 150 MHz (Vce = 5 V, Ic = 10 mA, f = 100 MHz)
• Noise Figure (NF): 2 dB (Vce = 5 V, Ic = 100 µA, f = 1 kHz)

Package Information

The BC560 is housed in a TO-92 (SOT54) plastic package, which is widely used for low-power transistors due to its compact size and ease of mounting. Below are the key mechanical specifications:

• Package Type: TO-92 (SOT54)
• Mounting Style: Through-hole
• Pin Configuration:
  • Pin 1: Emitter (E)
  • Pin 2: Base (B)
  • Pin 3: Collector (C)
• Dimensions:
  • Body Length: 4.95 mm (max)
  • Body Width: 3.94 mm (max)
  • Body Height: 4.95 mm (max)
  • Lead Pitch: 2.54 mm
• Weight: Approximately 0.13 grams
• Material: Molded plastic, compliant with UL 94V-0 flammability rating

Conclusion

The BC560 PNP transistor is a reliable and versatile component for low-power amplification and switching applications. Its combination of low noise, moderate gain, and compact TO-92 package makes it a staple in audio circuits, signal processing, and educational projects. With its complementary NPN counterparts, it enables symmetrical circuit designs, further expanding its utility. Engineers and hobbyists alike can rely on the BC560 for consistent performance in a wide range of electronic applications.