BD139 Medium Power NPN Transistor
BD139 is a medium-power NPN transistor (80V/1.5A) for audio drivers and switching applications. HTS 8541.29.00 classification. Popular in European amplifier designs.
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This product could be classified differently depending on its characteristics or intended use.
If for electrical lighting equipment
Transistors in complete lighting fixtures classify under 8512 parts.
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Import Tips & Compliance
• Specify thermal resistance for heat sink design requirements
• Include safe operating area (SOA) for pulsed audio applications
• Comply with automotive AEC-Q101 qualification if specified
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