Power Transistor BF871 NPN, 300V TO-202

Power Transistor BF871 NPN, 300V TO-202

Transistors

Reference: TRBF871

Part.No: BF871

€1.20

In Stock

Immediate Dispatch

The BF871 is a high-voltage NPN power transistor in a TO-202 package with an integrated metal tab for heatsink mounting. Widely used in CRT display RGB amplification stages and video output circuits requiring robust voltage handling.

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Description
Product Details

BF871 High-Voltage NPN Transistor – CRT & Video Output Amplifier

The BF871 is a specialized NPN transistor engineered for high-voltage video applications, particularly in CRT display circuits. With a maximum Vceo of 300V and a distinctive TO-202 package featuring an integrated heat-dissipating metal tab, it delivers reliable performance in demanding RGB amplification stages and deflection circuits.

Functions & Applications

Extreme Voltage Capability (300V Vceo): Essential for RGB amplification and high-voltage video output stages in CRT displays.
Integrated Heatsink Tab (TO-202): Metal tab directly connected to the collector provides excellent thermal dissipation when mounted to an aluminum heatsink.
Robust Design: Proven reliability in legacy broadcast and professional display equipment for decades.
Insulation Required: Metal tab is electrically live; mica insulator pad mandatory when sharing a heatsink with other components.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	NPN
Package / Case	TO-202
Collector-Emitter Voltage (Vceo)	300V
Mounting Type	Through-Hole (THT) with Heatsink Tab

Frequently Asked Questions

Q: Do I need to use an insulating mica pad when mounting the BF871?
A: Yes, the metal tab is electrically connected to the collector. If bolting to a shared heatsink with other components, a mica insulator is mandatory to prevent short circuits.

Q: What is the thermal benefit of the TO-202 package?
A: The integrated metal tab allows direct mounting to an aluminum heatsink, providing excellent heat dissipation for sustained high-voltage operation in video amplifier circuits.

Notes

Vintage/legacy part widely used in CRT display repair and restoration. Still in demand for maintaining classic broadcast and professional video equipment.

Note: Price refers to one (1) piece. The component is shipped in bulk without individual packaging.

Transistor Type: BJT (Bipolar Junction Transistor)
Transistor Polarity / Channel: NPN
Transistor Case Style: TO-202

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