The **2SB767-R-HF** is a high-performance PNP epitaxial silicon transistor. It is primarily designed for low-frequency power amplification and driver stage applications in electronic circuits. Below is a detailed breakdown of its electronic characteristics and specifications. --- ### 1. General Characteristics | Feature | Description | | :--- | :--- | | **Polarity** | PNP | | **Material** | Silicon (Epitaxial) | | **Package Type** | SOT-89 (Surface Mount Device) | | **Halogen Free** | Yes (denoted by the "-HF" suffix) | | **Key Attribute** | High current capacity in a compact power package | --- ### 2. Absolute Maximum Ratings ($T_a = 25^\circ C$) These values represent the stress limits of the component. Exceeding these may cause permanent damage. | Parameter | Symbol | Rating | Unit | | :--- | :--- | :--- | :--- | | Collector-Base Voltage | $V_{CBO}$ | -50 | V | | Collector-Emitter Voltage | $V_{CEO}$ | -50 | V | | Emitter-Base Voltage | $V_{EBO}$ | -5 | V | | Collector Current (DC) | $I_C$ | -2 | A | | Collector Current (Pulse) | $I_{CP}$ | -3 | A | | Power Dissipation | $P_C$ | 0.5 (mounted on PCB: 2.0) | W | | Junction Temperature | $T_j$ | 150 | $^\circ C$ | --- ### 3. Electrical Characteristics The "R" in the part number typically refers to the **hFE (DC Current Gain)** classification rank. | Characteristic | Symbol | Condition | Min | Max | Unit | | :--- | :--- | :--- | :--- | :--- | :--- | | DC Current Gain | $h_{FE}$ | $V_{CE}=-2V, I_C=-500mA$ | 120 | 240 | - | | Collector Saturation Voltage| $V_{CE(sat)}$| $I_C=-1A, I_B=-50mA$ | - | -0.5 | V | | Base Saturation Voltage | $V_{BE(sat)}$| $I_C=-1A, I_B=-50mA$ | - | -1.2 | V | | Transition Frequency | $f_T$ | $V_{CE}=-2V, I_C=-500mA$ | 120 (Typ) | - | MHz | --- ### 4. Typical Applications The 2SB767-R-HF is commonly found in the following circuit types: * **Voltage Regulators:** Used as a pass transistor in linear power supplies. * **Relay Drivers:** High current handling allows it to trigger mechanical relays or solenoids. * **Audio Amplifiers:** Suitable for the output stage of small portable audio devices. * **DC-DC Converters:** Acts as a high-speed switch for power management. --- ### 5. Package Pinout (SOT-89) ```text _______ | 2 | (Tab) ___|_______|___ | 1 2 3 | |___|___|___|___| 1: Base (B) 2: Collector (C) [Connected to Tab] 3: Emitter (E) ```