Question 1

What is BC551?

Accepted Answer

BC551 Transistor Datasheet pdf, BC551 Equivalent. Parameters and Characteristics

Question 2

What are the specifications of BC551?

Accepted Answer

Key specifications include: Material of Transistor: Si, Polarity: PNP, Maximum Collector Power Dissipation (Pc): 0.5 W, Maximum Collector-Base Voltage |Vcb|: 50 V, Maximum Collector-Emitter Voltage |Vce|: 45 V, Maximum Collector Current |Ic max|: 0.1 A, Max. Operating Junction Temperature (Tj): 150 °C, Transition Frequency (ft): 200 MHz, Forward Current Transfer Ratio (hFE), MIN: 140, Noise Figure, dB: -, Package: TO92

Question 3

What are equivalent components to BC551?

Accepted Answer

Common equivalents include: 2SB858B, 2SB858C, 2SB858D, 2SB859, 2SB859B, 2SB859C, 2SB86, 2SB860

BC551 Transistor — Specifications & Equivalents

Key Specifications

Equivalent & Replacement Parts

Material of Transistor	Si
Polarity	PNP
Maximum Collector Power Dissipation (Pc)	0.5 W
Maximum Collector-Base Voltage \|Vcb\|	50 V
Maximum Collector-Emitter Voltage \|Vce\|	45 V
Maximum Collector Current \|Ic max\|	0.1 A
Max. Operating Junction Temperature (Tj)	150 °C
Transition Frequency (ft)	200 MHz
Forward Current Transfer Ratio (hFE), MIN	140
Noise Figure, dB	-
Package	TO92