The **MPSA93G-AB3-R** is a high-voltage PNP epitaxial silicon transistor. It is primarily designed for applications requiring high breakdown voltages, such as telephony, video output stages, and high-voltage switching. ### 1. Key Specifications and Parameters The following table summarizes the electrical characteristics and physical properties of the MPSA93G-AB3-R: | Parameter | Symbol | Value | Unit | | :--- | :--- | :--- | :--- | | **Transistor Type** | Type | PNP | - | | **Collector-Emitter Voltage** | $V_{CEO}$ | -200 | V | | **Collector-Base Voltage** | $V_{CBO}$ | -200 | V | | **Emitter-Base Voltage** | $V_{EBO}$ | -5.0 | V | | **Collector Current (DC)** | $I_C$ | -500 | mA | | **DC Current Gain** | $h_{FE}$ | 40 - 200 | - | | **Transition Frequency** | $f_T$ | 50 | MHz | | **Package Type** | Pkg | SOT-89 | - | | **Lead-Free / RoHS** | Status | Compliant (G suffix) | - | --- ### 2. Part Number Breakdown Understanding the suffix nomenclature helps in identifying specific manufacturing traits: * **MPSA93**: The basic part number for a high-voltage PNP transistor. * **G**: Represents "Halogen Free" or "Green" materials, ensuring RoHS compliance. * **AB3**: Refers to the **SOT-89** package style (a small footprint, surface-mount package with good thermal dissipation). * **R**: Indicates the packaging format, typically **Tape and Reel** for automated assembly. --- ### 3. Application Areas Due to its high voltage rating and moderate current capacity, this part is commonly used in: 1. **Telecommunications**: Hook switches and line-driving circuits where line voltages can spike. 2. **Display Circuits**: Driving high-voltage stages in CRT or specialized LED displays. 3. **Level Shifting**: Translating control signals from low-voltage logic to high-voltage rails. 4. **Small Signal Switching**: General purpose switching where the rail voltage exceeds 100V. --- ### 4. Comparison: NPN Complement In many push-pull or complementary circuits, the MPSA93 (PNP) is paired with its NPN counterpart: * **Complementary NPN:** MPSA43 --- ### 5. Pinout Configuration (SOT-89) When looking at the top of the SOT-89 package (pins pointing down): 1. **Pin 1:** Base 2. **Pin 2/Tab:** Collector (The large center tab is also connected to the collector for heat sinking). 3. **Pin 3:** Emitter