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BC550 Transistor

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C550 Bipolar Transistors – 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 (VCEO 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 (TJ = 25 °C)

Parameter Symbol Value Unit
Collector–Base Voltage VCBO 50 V
Collector–Emitter Voltage VCEO 45 V
Emitter–Base Voltage VEBO 5 V
Collector Current (DC) IC 100 mA
Collector Power Dissipation PC 500 mW
Junction Temperature TJ 150 °C
Storage Temperature Range TSTG –65 to +150 °C

Electrical Characteristics (TC = 25 °C)

Parameter Symbol Test Conditions Min Typ Max Unit
Collector Cut‑off Current ICBO VCB = 30 V, IE = 0 — — 15 nA
DC Current Gain hFE VCE = 5 V, IC = 2 mA 110 — 800 —
VCE(sat) (low‑current) — IC = 10 mA, IB = 0.5 mA — 90 250 mV
VCE(sat) (high‑current) — IC = 100 mA, IB = 5 mA — 250 600 mV
VBE(on) — VCE = 5 V, IC = 2 mA 580 660 700 mV
VBE(on) (at 10 mA) — VCE = 5 V, IC = 10 mA — 720 — mV
VBE(sat) — IC = 10 mA, IB = 0.5 mA — 700 — mV
VBE(sat) (high‑current) — IC = 100 mA, IB = 5 mA — 900 — mV
Current Gain Bandwidth fT VCE = 5 V, IC = 10 mA, f = 100 MHz — 300 — MHz
Output Capacitance Cob VCB = 10 V, IE = 0, f = 1 MHz — 3.5 6.0 pF
Input Capacitance Cib VEB = 0.5 V, IC = 0, f = 1 MHz — 9 — pF
Noise Figure (BC550) N.F. VCE = 5 V, IC = 200 µA, f = 1 kHz, RG = 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.
BC550 Transistor

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  • Robot Pi Shop

    Pickup available,usually ready in 1 hour

    Ground Floor Shop, Sayde Street, Fanar Matn 1202
    Fanar
    Lebanon

    +96171791287

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