1N4448-A

Overview

The Vishay General Semiconductor - Diodes Division 1N4448-A is a silicon epitaxial planar fast switching diode housed in the DO-35 axial through-hole package. It features a non-repetitive peak reverse voltage of 100 V and a working peak reverse voltage of 75 V. The device supports a forward continuous current of 500 mA with an average rectified output current of 150 mA. Electrical characteristics include a maximum reverse recovery time of 4 ns, a total capacitance of 4 pF, and a power dissipation rating of 500 mW at 25°C. Operating temperatures range from -65°C to +175°C.

Feature Summary

• Fast switching speed suitable for high-frequency applications
• Silicon epitaxial planar construction for reliability
• Lead-free finish compliant with RoHS directives

Applications

• General purpose rectification
• High-speed switching circuits

Procurement Notes

Verify the manufacturer designation carefully, as the datasheet originates from Diodes Incorporated while the requested part lists Vishay as the supplier. Confirm that the specific ordering suffix matches the required packaging format, such as the 10K Ammo Pack indicated in the source documentation. Ensure compliance with the stated environmental standards before finalizing procurement orders.

Selection Notes

Select this component when a standard fast switching diode with a 75 V reverse voltage rating is required. The 500 mA forward current capability distinguishes it from lower-current variants. Verify that the DO-35 through-hole package aligns with the target PCB layout constraints and thermal management requirements for the intended application environment.

Part Context

This component belongs to the 1N4448 series of small signal switching diodes. It shares the same electrical specifications as the 1N4148 but offers higher current handling capabilities. The datasheet explicitly notes that this specific part number is not recommended for new designs, suggesting consideration of alternative surface mount options like the 1N4448W for modern implementations.

Replacement Considerations

The 1N4448TAP is listed as a direct substitute by the distributor.