A1020 PDF Datasheet – PNP Transistor – 2SA1020

This post explains for the transistor.

The Part Number is A1020, 2SA1020.

The function of this semiconductor is -50V, -2A, PNP Transistor.

The package is TO-92MOD Type

Manufacturer: Toshiba Semiconductor

Preview images :A1020 pdf pinout


A1020 is -50V, -2A, Silicon PNP Epitaxial Transistor. (PCT Process)

A PNP transistor is a type of bipolar junction transistor (BJT) with a different structure and polarity compared to an NPN transistor.

Characteristics of PNP transistors:

1. Structure: A PNP transistor has a sandwich-like structure, consisting of a thin N-type layer (base) sandwiched between two P-type layers (emitter and collector).

2. Polarity: In a PNP transistor, the majority charge carriers are holes, which flow from the emitter to the collector. The emitter is negative relative to the base, and the collector is positive relative to the base.

3. Current flow: When a small current is applied to the base terminal, it allows a much larger current to flow from the emitter to the collector. This is called amplification or gain, and it makes the PNP transistor useful as an electronic switch or amplifier.

4. Voltage levels: The voltage levels in a PNP transistor are opposite to those in an NPN transistor. In a NPN transistor, the base-emitter junction is forward-biased and the collector-base junction is reverse-biased.

5. Biasing: PNP transistors are biased in the opposite direction to NPN transistors. To turn on a PNP transistor, the base must be more negative than the emitter, and to turn it off, the base must be more positive than the emitter.


1. Low Collector saturation voltage: VCE (sat) = -0.5 V (max) (IC = -1 A)

2. High-speed switching: tstg = 1.0 µs (typ.)

3. Complementary to 2SC2655

A1020 datasheet pnp transistor

Absolute maximum ratings ( Ta=25°C )

1. Collector to Base Voltage: Vcbo = – 50 V

2. Collector to Emitter Voltage: Vceo = – 50 V

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

4. Collector Current: Ic = – 2 A

5. Collector Dissipation : Pc = 900 mW

6. Junction Temperature: Tj = 150°C

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


1. Power Amplifier

2. Power Switching


A1020 PDF Datasheet