1N458A

Overview

The Fairchild Semiconductor 1N458A is a general-purpose silicon switching diode designed for high-speed applications. It features an axial leaded DO-35 package suitable for through-hole mounting. The device provides a maximum repetitive peak reverse voltage of 100 V and supports a continuous forward current of 200 mA. Key electrical characteristics include a low forward voltage drop of 1 V at 10 mA and a fast reverse recovery time of 4 ns, ensuring efficient signal rectification with minimal delay.

Feature Summary

• High-speed switching capability with rapid reverse recovery
• Robust thermal stability across extended temperature ranges
• Low forward voltage drop for improved circuit efficiency

Applications

• High-frequency signal rectification in electronic circuits
• Clamping and protection circuits for sensitive components
• General-purpose switching in computer and digital logic systems

Procurement Notes

Verify the manufacturer marking on the component body to confirm Fairchild Semiconductor origin. Ensure the DO-35 package dimensions match your PCB footprint requirements. Check datasheet specifications for operating temperature limits before integration into harsh environments.

Selection Notes

Select this component when fast switching speeds are critical compared to standard rectifiers. The 100 V rating suits low-voltage logic interfaces. Consider the 200 mA current limit for load requirements. The DO-35 package offers reliable through-hole connectivity for prototyping and industrial assemblies.

Part Context

This diode belongs to the standard small-signal switching category, widely used in consumer electronics and industrial control panels. It serves as a fundamental discrete semiconductor element for signal processing tasks requiring precise timing and low power consumption.

Replacement Considerations

The 1N4148 is a confirmed substitute part number offering identical pinout and similar electrical performance characteristics for direct replacement in compatible designs.