2N4401 2N4403 NPN Transistor Pack 80 Pairs Todiys BJT Semiconductor

Description

Product Overview

The New 80Pairs for 80Pcs 2N4401 2N4401G + 80Pcs 2N4403 2N4403G to-92 NPN Transistors package delivers a comprehensive solution for engineers, technicians, and hobbyists who require a reliable stock of classic NPN transistors. Manufactured by Todiys, each transistor is housed in a TO-92 package, offering a compact footprint of 3.98 x 2.64 x 0.47 inches and a lightweight of just 0.353 ounces per unit. The set includes 80 pieces of the 2N4401 model and 80 pieces of the 2N4403 model, providing a total of 160 individual transistors. These components are brand‑new, fully tested, and ready for immediate integration into a wide range of electronic designs, from simple switch circuits to more demanding amplification stages. The product is listed under the Industrial & Scientific > Industrial Electrical > Semiconductor Products > Transistors > BJT category, reflecting its relevance to both professional and educational markets.

Usage

These NPN transistors excel in environments where reliable switching and amplification are essential. They are commonly employed in hobbyist projects such as Arduino‑based controllers, Raspberry Pi peripheral circuits, and DIY audio amplifiers. In professional settings, they serve as key components in power regulation modules, signal processing units, and legacy equipment maintenance. The 2N4401 is known for its low noise and moderate current handling, making it suitable for low‑power audio and signal applications, while the 2N4403 offers higher voltage tolerance, ideal for switching loads up to 40 V. Whether you are building a prototype, repairing a vintage device, or stocking a teaching lab, this 80‑pair set ensures you have the right part on hand without the need for frequent re‑ordering.

Why Choose Us

Choosing Todiys for your transistor needs means opting for quality, consistency, and customer‑focused service. Each transistor undergoes rigorous testing to meet industry standards, guaranteeing low saturation voltage, stable gain, and long‑term reliability. The packaging is designed for easy handling and inventory control, with clear labeling that prevents mix‑ups between the 2N4401 and 2N4403 models. Additionally, Todiys provides responsive after‑sales support, offering technical assistance for order verification and ensuring that any concerns are addressed promptly. Our commitment to maintaining a high customer rating (4.8 out of 5 stars from 9 reviews) reflects the satisfaction of engineers and makers who rely on our components for critical projects.

Key Features

• High reliability with tested performance for consistent switching and amplification.
• Compact TO‑92 package fits easily into dense circuit layouts and prototyping boards.
• Wide voltage range: 2N4401 for low‑noise applications, 2N4403 for higher voltage loads.
• Cost‑effective bulk quantity eliminates the need for frequent re‑ordering.
• Responsive customer support and easy return policy for peace of mind.

FAQ

What is the difference between the 2N4401 and 2N4403 transistors?

The 2N4401 is optimized for low‑noise, low‑current applications, making it ideal for audio and signal amplification. The 2N4403 can handle higher collector‑emitter voltages (up to 40 V) and is better suited for switching larger loads.

Are these transistors suitable for surface‑mount technology (SMT) projects?

No, the transistors in this pack are provided in the traditional TO‑92 through‑hole package. For SMT designs, you would need to select a different package type such as SOT‑23.

Do the transistors come with any warranty or guarantee?

Yes, Todiys offers a standard one‑year warranty covering manufacturing defects. If you encounter any issues, contact our support team for a replacement or refund.

Can I use these transistors in high‑frequency circuits?

While the 2N4401 and 2N4403 are not specifically designed for RF applications, they perform adequately up to a few megahertz, making them suitable for many general‑purpose high‑frequency tasks.

How should I store the transistors to maintain their performance?

Store them in a dry, temperature‑controlled environment, preferably in anti‑static packaging. Avoid exposure to moisture or extreme temperatures to preserve their electrical characteristics.