BC547 Bipolar Junction Transistors – BJT NPN 45V 100mA

Description

BC547 Bipolar Junction Transistors – BJT NPN 45V 100mA The BC547 is a general‑purpose NPN silicon transistor designed for low‑current switching and amplification. With a collector‑emitter voltage rating of 45 V and a maximum collector current of 100 mA, it’s ideal for signal processing, driver stages, and interface applications in audio, instrumentation, and control circuits. Features High Voltage Capability: V CEO = 45 V Moderate Current Handling: I C = 100 mA Low Saturation Voltages: V CE(sat) ≈ 90 mV @ 10 mA Wide h FE Gain Classification (A: 110–220, B: 200–450, C: 420–800) High Transition Frequency: f T ≈ 300 MHz Low Noise Figure: NF ≈ 2 dB Compact TO‑92 Package Specifications Parameter Symbol Test Conditions Min Typ Max Units Collector–Emitter Voltage V CEO – – – 45 V Collector–Base Voltage V CBO – – – 50 V Emitter–Base Voltage V EBO – – – 5 V Collector Current (DC) I C – – – 100 mA Power Dissipation P C – – – 500 mW DC Current Gain h FE V CE = 5V, I C = 2mA 110 110–800 800 – Saturation Voltage (C–E) V CE(sat) I C =10 mA, I B =0.5 mA – 90 200 mV Saturation Voltage (B–E) V BE(sat) I C =10 mA, I B =0.5 mA – 700 900 mV Transition Frequency f T V CE =5 V, I C =10 mA, f=100 MHz – 300 – MHz Output Capacitance C ob V CB =10 V, I E =0, f=1 MHz – 3.5 6 pF Input Capacitance C ib V EB =0.5 V, I C =0, f=1 MHz – 9 – pF Pinout: Applications Signal Amplification: Pre‑amplifiers, oscillators, and linear stages Switching: LED drivers, relay drivers, transistor‑transistor logic (TTL) interfaces Audio Circuits: Low‑noise stages in audio pre‑amps General‑Purpose: Analog/digital interface, sensor signal conditioning, hobbyist and educational projects Package Included: 1x BC547 Bipolar Junction Transistors – BJT NPN 45V 100mA. Datasheet: BC547 Bipolar Junction Transistor.

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