BC550 Bipolar Transistors – BJT NPN

Description

BC550 Bipolar Transistors – BJT NPN The BC550 is a low-noise, general-purpose NPN epitaxial silicon transistor in a TO-92 package. It is optimized for amplifier and switching applications where low noise and moderate voltage handling (up to 45 V collector–emitter) are required Features Switching and Amplifier functionality High‑Voltage capability (V CEO up to 45 V) Low‑Noise performance (noise figure down to 1.4 dB) Complementary to BC556, BC557, BC558, BC559, and BC560 series Pb‑Free Device, RoHS‑compliant Specifications Absolute Maximum Ratings (T J = 25 °C) Parameter Symbol Value Unit Collector–Base Voltage V CBO 50 V Collector–Emitter Voltage V CEO 45 V Emitter–Base Voltage V EBO 5 V Collector Current (DC) I C 100 mA Collector Power Dissipation P C 500 mW Junction Temperature T J 150 °C Storage Temperature Range T STG –65 to +150 °C Electrical Characteristics (T C = 25 °C) Parameter Symbol Test Conditions Min Typ Max Unit Collector Cut‑off Current I CBO V CB = 30 V, I E = 0 — — 15 nA DC Current Gain h FE V CE = 5 V, I C = 2 mA 110 — 800 — V CE(sat) (low‑current) — I C = 10 mA, I B = 0.5 mA — 90 250 mV V CE(sat) (high‑current) — I C = 100 mA, I B = 5 mA — 250 600 mV V BE(on) — V CE = 5 V, I C = 2 mA 580 660 700 mV V BE(on) (at 10 mA) — V CE = 5 V, I C = 10 mA — 720 — mV V BE(sat) — I C = 10 mA, I B = 0.5 mA — 700 — mV V BE(sat) (high‑current) — I C = 100 mA, I B = 5 mA — 900 — mV Current Gain Bandwidth 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 6.0 pF Input Capacitance C ib V EB = 0.5 V, I C = 0, f = 1 MHz — 9 — pF Noise Figure (BC550) N.F. V CE = 5 V, I C = 200 µA, f = 1 kHz, R G = 2 kΩ 1.4 — 3.0 dB Applications Audio Amplifiers and Preamplifiers : Provides clean, low-noise signal amplification. Signal Amplification : Ideal for sensors, detectors, and other sensitive devices. Switching Circuits : Used in digital logic and control systems. Oscillator Circuits : Suitable for generating signals in various frequency ranges. DataSheet BC550-Datasheet

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