The **2SA1035-R** is a silicon PNP epitaxial planar transistor. It is primarily designed for high-frequency amplification and is often paired with its NPN complement, the 2SC2411. --- ### ## 1. Key Specifications The 2SA1035-R is known for its low noise and high-speed switching capabilities. Below are the absolute maximum ratings and electrical characteristics: | Parameter | Symbol | Rating | Unit | | :--- | :--- | :--- | :--- | | Collector-Base Voltage | $V_{CBO}$ | -50 | V | | Collector-Emitter Voltage | $V_{CEO}$ | -40 | V | | Emitter-Base Voltage | $V_{EBO}$ | -5 | V | | Collector Current | $I_C$ | -150 | mA | | Power Dissipation | $P_C$ | 200 | mW | | Junction Temperature | $T_j$ | 150 | °C | --- ### ## 2. Classification of DC Current Gain ($h_{FE}$) The suffix **"-R"** in the part number specifically refers to the DC current gain ($h_{FE}$) classification. Transistors in this series are binned based on their gain levels: | Suffix | $h_{FE}$ Range | | :--- | :--- | | 2SA1035-Q | 120 to 270 | | **2SA1035-R** | **180 to 390** | | 2SA1035-S | 270 to 560 | --- ### ## 3. Common Applications Due to its high frequency of transition ($f_T$) and low noise figure, this component is commonly used in: * **Audio Preamplifiers:** For low-noise signal processing. * **High-Frequency Amps:** RF amplification in radio equipment. * **Switching:** Small signal switching in consumer electronics. --- ### ## 4. Pinout Configuration The 2SA1035-R typically comes in a **SOT-23** (Surface Mount) or **TO-92** package, depending on the manufacturer (commonly Rohm or Panasonic). The standard pinout for the SOT-23 version is: ```text Pin 1: Base (B) Pin 2: Emitter (E) Pin 3: Collector (C) ``` ---