Product overview power audio output transistors supplied as a pack of 5 pieces. Designed for use in amplifier output stages and audio power applications, these TO3PL packaged devices offer stable electrical characteristics and reliable mounting for heat sinking. Key benefits Direct replacement compatibility: Includes models and equivalents 2SA1302, 2SA1943, 2SC3281, 2SC5200, A1302, C3281, C5200 for circuits that require these specific transistor types. Robust packaging: TO3PL package simplifies secure mounting to heat sinks for better thermal management and consistent performance under load. Precision and stability: Semiconductor construction and matching characteristics minimize distortion and support steady output in audio amplifier stages. Versatile use: Suitable for , upgrade, or builds where power bipolar junction transistors are required. Quantity and condition: Pack of 5 pieces, 2025 stock for recent availability. Features and specifications Function: Power transistors for audio output stages and power switching in amplifier circuits. Compatible models: 2SA1302, 2SA1943, 2SC3281, 2SC5200, A1302, C3281, C5200. Package type: TO3PL for secure heat sink mounting and improved thermal dissipation. Material: Siliconbased bipolar junction transistor construction. Performance focus: current handling and stable operating characteristics suitable for fidelity audio applications and power amplifier stages. Mounting and size: Standard TO3PL mechanical dimensions for common amplifier chassis and heat sink arrangements. How this product solves common problems Replaces worn or failed output transistors to restore amplifier power and sound quality. Provides matching, robust devices that reduce thermal drift and improve longterm stability. Simplifies repairs by using a common TO3PL package that fits established mounting and cooling designs. Practical use scenarios scenario: failed output transistors in a hifi stereo amplifier to restore full power output and channel balance. DIY build: Use matched TO3PL power transistors in a custom amplifier or power stage project for reliable cooling and predictable performance. Professional maintenance: Recondition public address or small PA amplifier modules by swapping in these transistors to recover output capability and maintain sound clarity. What to check before installation Confirm the required transistor model and pinout match the existing circuit or PCB layout. Verify heat sink specifications and mounting hardware are compatible with TO3PL package dimensions. Observe proper handling of semiconductor devices to avoid electrostatic damage during installation. This pack of 5 power transistors provides a practical, dropin option for audio amplifier maintenance, upgrades, and builds where the listed models and TO3PL packaging are specified.