2SA1381 + 2SC3503 TRANSISTOR TO-126 (PAIR)

This is a matched pair of 2SA1381 (PNP) and 2SC3503 (NPN) transistors, both housed in the TO-126 package. These transistors are designed for audio amplifier applications, particularly in the output stage where linearity and complementary symmetry are crucial. The TO-126 package provides adequate heat dissipation for moderate power levels, making them suitable for a variety of audio amplifier designs. The complementary nature of these transistors allows for efficient push-pull amplification, resulting in low distortion and high fidelity audio reproduction. This matched pair ensures optimal performance and balanced operation in your audio amplifier circuit.

The 2SA1381 is a PNP silicon transistor with a collector-emitter voltage (Vceo) of -80V, a collector current (Ic) of -3A, and a power dissipation (Pc) of 25W. The 2SC3503 is its NPN complement, with a Vceo of 80V, an Ic of 3A, and a Pc of 25W. These specifications make them suitable for medium-power audio amplification. The TO-126 package provides ease of mounting and soldering, simplifying the assembly process. The complementary characteristics of these transistors ensure balanced operation and low distortion in audio amplifier circuits. They are commonly used in hi-fi amplifiers, guitar amplifiers, and other audio equipment.

When selecting transistors for your audio amplifier project, this matched pair of 2SA1381 and 2SC3503 offers a compelling combination of performance, reliability, and complementary symmetry. Their high voltage and current ratings make them suitable for medium-power amplification. The TO-126 package provides adequate heat dissipation for stable operation. The complementary nature of these transistors ensures balanced operation and low distortion, resulting in high-quality audio reproduction. This matched pair is a cost-effective solution for your audio amplification needs, providing excellent value for your money.

The 2SA1381 and 2SC3503 are direct replacements for other complementary transistor pairs with similar specifications and pinouts. Before replacing any component, always consult the datasheet to ensure compatibility and proper biasing. These transistors are readily available from various electronic component suppliers, making them easy to source for your projects. Their widespread availability and consistent performance make them a reliable choice for both prototyping and production runs. Consider this matched pair for your next audio amplifier project.

In summary, this matched pair of 2SA1381 and 2SC3503 transistors is a versatile and reliable solution for audio amplifier applications. Their complementary symmetry, high voltage and current ratings, and TO-126 package make them an excellent choice for medium-power amplification. Whether you are a seasoned engineer or a hobbyist, this matched pair offers a compelling combination of performance and value. Add this 2SA1381 + 2SC3503 transistor pair to your cart today and experience their exceptional performance in your next audio amplifier project!