Transistor 2SA999 PNP, 0.15A TO-92

Transistor 2SA999 PNP, 0.15A TO-92

Transistors

Reference: TR2SA999

Part.No: 2SA999

€1.20

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The 2SA999 is a reliable PNP Bipolar Junction Transistor (BJT) in a TO-92 package. Designed for small-signal amplification and low-power switching in audio circuits, sensor interfaces, and general-purpose DIY electronics.

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Description
Product Details

2SA999 PNP Small Signal Transistor – Versatile Amplification & Switching

The 2SA999 is a versatile PNP transistor recognized for its reliable performance in low-current applications. Whether you are designing an audio pre-amplifier, a complementary push-pull stage, or a simple switching circuit, the 2SA999 delivers consistent gain and stability in both analog and digital circuits.

Functions & Applications

PNP Complementary Design: Pairs perfectly with NPN transistors for balanced push-pull and differential amplifier stages.
Standard TO-92 Package: Compact through-hole form factor, ideal for breadboarding and universal PCB layouts.
Reliable Gain: Consistent hFE across the operating range, suitable for audio and sensor signal processing.
Low Power Operation: Minimal standby current draw, efficient for battery-powered applications.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	PNP
Package / Case	TO-92
Collector-Emitter Voltage (Vceo)	50V
Max Collector Current (Ic)	150mA
Power Dissipation (Pd)	625mW
Mounting Type	Through-Hole (THT)

Frequently Asked Questions

Q: What is the complementary NPN transistor for the 2SA999?
A: The complementary NPN transistor is the 2SC2482 or 2SC1815, which share similar electrical characteristics and packaging for matched push-pull stages.

Q: Can the 2SA999 drive a small relay or solenoid?
A: Yes, provided the load current does not exceed 150mA. Always use a flyback diode in parallel with inductive loads to protect the transistor from voltage spikes.

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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