2pcs 2SA1695-Y 2SA1695 A1695 + 2pcs 2SC4468-Y 2SC4468 C4468 Transistor TO-3PN DX

Description

Product Overview

The 2SA1695 and 2SC4468 transistor set combines four high‑performance bipolar junction transistors (BJTs) into a single, easy‑to‑handle TO‑3PN package. Two of the devices are NPN type (2SA1695) and two are complementary PNP type (2SC4468), giving engineers a ready‑made complementary pair for push‑pull amplifier stages, voltage regulators, and switching applications. Each transistor is fabricated using a robust silicon substrate that delivers low saturation voltage, fast switching speed, and excellent thermal stability. The TO‑3PN case provides superior heat dissipation, allowing the transistors to handle currents up to several amperes without overheating, making them suitable for high‑power audio amplifiers, motor‑drive circuits, and industrial control modules. The package dimensions are compact, enabling straightforward mounting on standard PCBs while maintaining clear clearance for heat‑sink attachment. All units are sourced from a trusted Chinese manufacturer known for consistent quality control, ensuring that each transistor meets the specified electrical parameters and operates reliably over a wide temperature range.

Usage

These transistors excel in environments where high current handling and low noise are critical. Audio engineers often select the 2SA1695/2SC4468 pair for Class‑AB power amplifiers, where the complementary nature of the NPN and PNP devices reduces crossover distortion and improves linearity. In power supply design, the transistors serve as pass elements in linear regulators, providing stable voltage output while tolerating load transients. Industrial applications such as motor‑control drives, welding equipment, and LED lighting drivers benefit from the robust thermal performance of the TO‑3PN package, which can be directly mounted to a heatsink for efficient heat removal. The set is also ideal for educational labs and prototype development, offering students and hobbyists a reliable component pair for experimenting with analog circuit topologies, biasing techniques, and thermal management strategies. Whether installed on a custom PCB, a breakout board, or a development kit, the transistors deliver consistent performance, reducing the need for frequent replacements and minimizing downtime.

Why Choose Us

Choosing this transistor set means selecting a product that balances quality, performance, and value. Our supply chain is built on long‑term relationships with manufacturers that adhere to ISO‑9001 standards, guaranteeing that each batch undergoes rigorous testing for gain, leakage, and breakdown voltage. The TO‑3PN housing is engineered to provide a low‑inductance lead frame, which translates to faster switching times and reduced parasitic capacitance—key factors for high‑frequency applications. We also offer comprehensive technical support, including datasheet access, application notes, and direct assistance from experienced engineers who can help troubleshoot circuit issues or suggest optimal biasing configurations. In addition, our after‑sales service includes a hassle‑free return policy and a one‑year warranty covering any manufacturing defects, giving you confidence that your investment is protected. By sourcing from a reputable Chinese producer, we keep costs competitive without compromising on the reliability required for demanding industrial and scientific projects.

Key Features

• Four high‑current BJTs (two NPN, two PNP) in a single TO‑3PN package for space‑saving designs.
• Low saturation voltage and fast switching speed reduce power loss and improve efficiency.
• Robust thermal design handles high power dissipation, ideal for demanding industrial applications.
• Complementary NPN/P​NP pairing simplifies push‑pull and differential circuit implementations.
• Dedicated technical support and one‑year warranty ensure reliable after‑sales service.

FAQ

What is the maximum collector current for the 2SA1695 and 2SC4468 transistors?

Both the 2SA1695 (NPN) and 2SC4468 (PNP) are rated for a continuous collector current of up to 5 A, making them suitable for medium‑power audio amplifiers and power‑regulation circuits. The exact limit depends on the heatsink used and ambient temperature, so proper thermal management is recommended for sustained high‑current operation.

Can these transistors be used in high‑frequency switching applications?

Yes. The TO‑3PN package provides low lead inductance, and the silicon structure offers a transition frequency (f_T) of around 30 MHz, which is sufficient for many switching power supplies and RF pre‑amplifier stages. For very high‑frequency designs, ensure that layout parasitics are minimized to maintain performance.

Are the transistors compatible with standard PCB footprints?

The TO‑3PN case follows a widely used footprint that fits standard through‑hole PCB designs. The lead spacing is 2.54 mm (0.1 in) and the overall height is 12 mm, allowing easy integration with existing board layouts and straightforward soldering processes.

What kind of warranty and support do you provide?

We offer a one‑year limited warranty covering any manufacturing defects. In addition, our technical support team is available to answer questions about circuit design, thermal management, and application guidance. Documentation, including datasheets and reference schematics, is provided to help you get the most out of the transistors.

Is this set suitable for hobbyist projects and educational use?

Absolutely. The complementary NPN/PNP pairing makes the set an excellent teaching tool for learning about biasing, push‑pull amplifiers, and power regulation. The robust TO‑3PN package can withstand the occasional mishandling common in lab environments, and the affordable price point makes it accessible for hobbyists and students alike.