Question 1

What is BD139?

Accepted Answer

BD139 Transistor Datasheet pdf, BD139 Equivalent. Parameters and Characteristics

Question 2

What are the specifications of BD139?

Accepted Answer

Key specifications include: Material of Transistor: Si, Polarity: NPN, Maximum Collector Power Dissipation (Pc): 12 W, Maximum Collector-Base Voltage |Vcb|: 80 V, Maximum Collector-Emitter Voltage |Vce|: 80 V, Maximum Emitter-Base Voltage |Veb|: 5 V, Maximum Collector Current |Ic max|: 1 A, Max. Operating Junction Temperature (Tj): 150 °C, Transition Frequency (ft): 50 MHz, Forward Current Transfer Ratio (hFE), MIN: 40, Noise Figure, dB: -, Package: TO126

Question 3

What are equivalent components to BD139?

Accepted Answer

Common equivalents include: BD137-10, BD137-16, BD137-6, BD137G, BD138, BD138-10, BD138-6, BD138G

BD139 Transistor — Specifications & Equivalents

Key Specifications

Equivalent & Replacement Parts

Material of Transistor	Si
Polarity	NPN
Maximum Collector Power Dissipation (Pc)	12 W
Maximum Collector-Base Voltage \|Vcb\|	80 V
Maximum Collector-Emitter Voltage \|Vce\|	80 V
Maximum Emitter-Base Voltage \|Veb\|	5 V
Maximum Collector Current \|Ic max\|	1 A
Max. Operating Junction Temperature (Tj)	150 °C
Transition Frequency (ft)	50 MHz
Forward Current Transfer Ratio (hFE), MIN	40
Noise Figure, dB	-
Package	TO126