Transistor 2SA817

Transistor 2SA817 PNP, 0.3A TO-92

Transistors

Reference: TR2SA817

Part.No: 2SA817

€0.80

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The 2SA817 is a PNP Silicon Epitaxial Bipolar Transistor (BJT) by Toshiba in a TO-92 package. Designed as a driver stage for 20-25W audio power amplifiers and general audio frequency amplification.

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Description
Product Details

2SA817 PNP Audio Driver Transistor - Toshiba TO-92

The 2SA817 is a PNP silicon epitaxial transistor from Toshiba, originally developed for driver stages in mid-power audio frequency amplifiers. Its combination of high current gain and a solid 80V breakdown voltage makes it a reliable choice for repairing vintage audio equipment or building small driver/pre-driver stages in DIY amplifier projects.

Functions & Applications

High Breakdown Voltage: Vceo of -80V provides safety margin in audio amplifier driver stages.
Wide hFE Range: Current gain from 70 up to 240 depending on the grading (O or Y), suitable for driver and pre-driver applications.
Audio Frequency Optimized: Suitable for driver of 20-25W audio power amplifiers.
Complementary Pair Available: Pairs directly with the NPN 2SC1627 for push-pull or complementary designs.
Standard TO-92 Package: Easy through-hole mounting for prototyping, repair and PCB assembly.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	PNP
Package / Case	TO-92
Collector-Emitter Voltage (Vceo)	-80V
Max Collector Current (Ic)	-0.3A
Power Dissipation (Pc)	625mW
DC Current Gain (hFE)	70-240
Transition Frequency (ft)	40MHz
Mounting Type	Through-Hole (THT)

Frequently Asked Questions

Q: What is the complementary NPN transistor for the 2SA817?
A: The complementary NPN transistor to the 2SA817 is the 2SC1627, commonly used together in push-pull audio driver stages.

Q: What is the maximum current the 2SA817 can handle?
A: The 2SA817 has a maximum collector current of 0.3A (300mA) and a power dissipation of 625mW, suitable for driver stages rather than final output power stages.

Notes

This is a legacy Toshiba part, still widely used for servicing vintage audio equipment and amplifier repairs where the original 2SA817 or its direct equivalent is required.

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: PNP
Transistor Case Style: TO-92

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