This post explains for the transistor 2SA970.

The Part Number is A970.

The function of this semiconductor is -120V, -100mA, PNP Transistor.

The package is TO-92 Type.

Manufacturer: Toshiba

Preview images :

Description

A970 is 120V, 100mA, PNP Epitaxial Type Transistor.

Characteristics:

Features

• Low noise :

(1) NF = 3dB (typ.) RG = 100 Ω, VCE = −6 V, IC = −100 μA, f = 1 kHz :
(2) NF = 0.5dB (typ.) RG = 1 kΩ, VCE = −6 V, IC = −100 μA, f = 1 kHz

• High DC current gain: hFE = 200~700

• High breakdown voltage: VCEO = −120 V

• Low pulse noise. Low 1/f noise

 

Absolute maximum ratings ( Ta=25°C )

1. Collector to Base Voltage: Vcbo = – 120 V

2. Collector to Emitter Voltage: Vceo = – 120 V

3. Emitter to Base Voltage: Vebo = – 5 V

4. Collector Current: Ic = 100 mA

5. Collector Dissipation : Pc = 300 mW

6. Junction Temperature: Tj = 150°C

7. Storage Temperature: Tsg = -55 ~ +150°C

Applications:

1. Low Noise Audio Amplifier

A970 PDF Datasheet