The **2SD2353** is an NPN epitaxial planar silicon transistor designed primarily for high-definition color display horizontal deflection output applications. ### 1. Key Specifications The following table summarizes the absolute maximum ratings and electrical characteristics of the 2SD2353. | Parameter | Symbol | Rating | Unit | | :--- | :--- | :--- | :--- | | Collector-to-Base Voltage | $V_{CBO}$ | 1500 | V | | Collector-to-Emitter Voltage | $V_{CEO}$ | 800 | V | | Emitter-to-Base Voltage | $V_{EBO}$ | 6 | V | | Collector Current (DC) | $I_C$ | 6 | A | | Collector Current (Pulse) | $I_{CP}$ | 12 | A | | Total Device Dissipation ($T_c = 25^\circ C$) | $P_C$ | 50 | W | | Junction Temperature | $T_j$ | 150 | $^\circ C$ | --- ### 2. Functional Description The "06" suffix often refers to specific gain grouping or packaging variations depending on the manufacturer (commonly Sanyo or ON Semiconductor). * **High Speed:** It features a very short fall time ($t_f$), which is critical for reducing power loss during switching in horizontal deflection circuits. * **High Voltage Resistance:** With a $V_{CBO}$ of 1500V, it can withstand the high-voltage flyback pulses generated in CRT monitors and TVs. * **Built-in Damper Diode:** Many versions of this series include an integrated damper diode between the collector and emitter to simplify circuit design, though you should verify the specific datasheet for your "06" variant. --- ### 3. Pin Configuration The device is typically housed in a **TO-220FI** (Full Mold) or **TO-3PF** package. ```text Pin 1: Base (B) Pin 2: Collector (C) Pin 3: Emitter (E) ``` --- ### 4. Common Applications 1. **Horizontal Deflection Output:** Used in high-resolution CRT monitors to drive the horizontal yoke. 2. **Switching Power Supplies:** High-voltage DC/DC converters. 3. **Inverters:** Industrial high-voltage switching applications.