The **2SA1013-R** is a high-voltage PNP epitaxial silicon transistor designed primarily for power switching and color TV vertical deflection output applications. It is often paired with its NPN complement, the **2SC2383**. --- ### 1. Key Technical Specifications The "R" suffix typically denotes the **hFE (current gain) classification**, which usually falls within the range of 60 to 120. | Parameter | Symbol | Rating | Unit | | :--- | :--- | :--- | :--- | | Collector-Base Voltage | $V_{CBO}$ | -160 | V | | Collector-Emitter Voltage | $V_{CEO}$ | -160 | V | | Emitter-Base Voltage | $V_{EBO}$ | -6 | V | | Collector Current (DC) | $I_C$ | -1 | A | | Collector Power Dissipation | $P_C$ | 900 | mW | | Junction Temperature | $T_j$ | 150 | °C | --- ### 2. Pin Configuration The 2SA1013 is most commonly found in the **TO-92MOD** (also known as TO-92L) package, which is slightly taller than a standard TO-92 to allow for better heat dissipation. | Pin Number | Name | Function | | :--- | :--- | :--- | | 1 | **Emitter** | Current exits the transistor | | 2 | **Collector** | Connected to the load | | 3 | **Base** | Controls the biasing of the transistor | --- ### 3. Features & Applications #### Features: * **High Voltage:** Capable of handling up to -160V, making it ideal for high-rail voltage circuits. * **Large Collector Current:** Supports up to 1A, which is high for its small footprint. * **Excellent Linearity:** Provides stable gain across various current levels. #### Common Applications: 1. **Vertical Deflection:** Used in CRT monitors and older television sets. 2. **Audio Amplifiers:** Frequently used in the driver stage of high-power audio amplifiers. 3. **Voltage Regulators:** Employed in series regulator circuits. 4. **Relay Drivers:** Used to switch 48V or higher voltage relays. --- ### 4. Equivalent / Replacement Parts If the 2SA1013-R is unavailable, the following transistors are common substitutes (though pinouts and gain should always be verified): * **KSA1013:** (Fairchild/ON Semi equivalent) * **2SA1275:** (Similar high-voltage PNP) * **KTA1023:** (Common alternative) ---