A1943 PDF – 230V, 15A, PNP Transistor, 2SA1943

This post explains for the transistor.

The Part Number is A1943, 2SA1943.

The Package is TO-3P Type

The function of this semiconductor is 230V, PNP Transistor.

Manufacturer: Toshiba

A1943 pinout transistor


The A1943 is Silicon PNP Triple Diffused Transistor.

A silicon PNP triple-diffused transistor with a voltage rating of -230V and a current rating of -15A refers to a specific type of bipolar junction transistor (BJT) designed for high-voltage and high-current applications. Let’s break down the specifications:

1. PNP Type: The transistor is a PNP (Positive-Negative-Positive) transistor, which means it has three layers of semiconductor material: a lightly doped N-region sandwiched between two heavily doped P-regions. In a PNP transistor, current flows from the emitter (E) to the base (B) and then to the collector (C) when a small current is applied to the base.

2. Voltage Rating: The transistor has a maximum voltage rating of 230 volts (V). This means it can handle a maximum voltage of 230V in its operating conditions without the risk of damage.

3. Current Rating: The transistor has a maximum current rating of 15 amperes (A). This specifies the maximum continuous current that can flow through the transistor without exceeding its current handling capacity.


• High collector voltage: VCEO = −230 V (min)

• Complementary to 2SC5200

• Recommended for 100-W high-fidelity audio frequency amplifier output stage.


Absolute maximum ratings ( Ta=25°C )

1. Collector to Base Voltage: Vcbo = – 230 V

2. Collector to Emitter Voltage: Vceo = – 230 V

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

4. Collector Current: Ic = – 15 A

5. Collector Power Dissipation : Pc = 150 W

6. Junction Temperature: Tj = 150°C

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


A1943 pdf datasheet



1. Power Amplifier

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A1943 PDF Datasheet