Review 022: Phillips BC547 45v 0.1A NPN Transistor Review

product specifications

General
Type: Transistor (NPN)
Architecture: For all electronics
Package: TO-92 (SOT54 plastic package)
RoHs: Compliant
Number of Elements: Single element
Transition Frequency (if collector current is 100mA and collector-emitter voltage is 5 volts): 100 MHz
Operating Temperature Classification: Military-grade
Storage Temperature: -65°C - 150°C
Junction Temperature: 150°C maximum
Operating Ambient Temperature: -65°C - 150°C
Mounting: Through-hole
Thermal Resistance from junction to ambient (when mounted on a FR4 PCB): 0.25 K/mW
Collector Capacitance (if emitter current is 0 mA, collector-base voltage is 10 volts and measurement frequency is 1 MHz): 1.5 pF
Emitter Capacitance (if collector current is 0 mA, emitter-base voltage is 0.5 volts and measurement frequency is 1 MHz): 11 pF
Noise Figure (if collector current is 200 µA, emitter-base voltage is 5 volts, sheet resistance is 2KΩ, measurement frequency is 1 MHz and noise bandwidth is 20 Hz): 2 dB - 10 dB

Pin Count: 3 pins
Power
Collector-base voltage: 50 volts maximum
Collector-emitter voltage (max.): 45 volts
Emitter-base voltage: 6 volts maximum
Collector current (DC): 100 mA
Peak collector current: 200 mA
Total Power Dissipation (if ambient temperature is less than 25°C and when mounted on a FR4 PCB): 500 mW
Collector cut-off current (if emitter current is 0 mA and collector-base voltage is 30 volts): 15 nA
Emitter cut-off current (if collector current is 0 mA and emitter-base voltage is 5 volts): 100 nA
DC Current Gain (if collector current is 10 µA and collector-emitter voltage is 5 volts: 150
DC Current Gain (if collector current is 2 mA and collector-emitter voltage is 5 volts): 200 - 450 (290 typically)
Collector-emitter saturation voltage (if collector current is 10 mA and base current is 0.5 mA): 90 - 250 mV
Collector-emitter saturation voltage (if collector current is 100 mA and base current is 5 mA): 200 - 600 mV
Base-emitter saturation voltage (if collector current is 10 mA and base current is 0.5 mA): 700 mV (decreases by about 1.7 mV/K with increasing temperature)
Peak base current: 200 mA

Base-emitter saturation voltage (if collector current is 100 mA and base current is 5 mA): 900 mV (decreases by about 1.7 mV/K with increasing temperature)
Base-emitter voltage (if collector current is 2 mA and collector-emitter voltage is 5 volts): 580 - 700 mV (660 typically with a decrease by about 2 mV/K with increasing temperature)
Base-emitter voltage (if collector current is 10 mA and collector-emitter voltage is 5 volts): 770 mV
Collector cut-off current (if emitter current is 0 mA, collector-base voltage is 30 volts and junction temperature is 150°C): 100 µA
Weight and Size Dimensions
Product Weight: < 0g
Product Size (L x W x H): 4.5 x 3.1 x 18.1 mm
Lead Diameter: ≈ 0.1 mm
Transistor Case Dimensions (L x W x H): 4.2 x 3.1 x 3.1 mm

product review

This basic passive component, the transistor, is as basic as electronics can get, due to the BC547:
1. Having a low collector current of only 100 mA, which is amazing for simple electronic hobbyists.
2. Being a multi-purpose NPN transistor, which is commonly used for general purpose switching and amplification, used in transistor radios, timing circuits, and other devices.