1N459

Overview

The onsemi 1N459 is a small signal switching diode housed in a DO-35 through-hole package. It features a 200 V reverse voltage rating and supports a continuous forward current of 500 mA with a maximum surge current of 4 A. The device exhibits low leakage characteristics, specified at 25 nA, and maintains a forward voltage drop of 1 V. Designed for robust operation, it functions within an extended temperature range from -65 °C to +175 °C.

Feature Summary

• High conductance performance combined with low leakage current specifications
• Capable of handling significant transient surge currents up to 4 A
• Operates reliably across extreme ambient temperatures reaching +175 °C

Applications

• General purpose rectification circuits
• Small signal switching applications
• High conductance low leakage requirements

Procurement Notes

Verify component authenticity against official datasheets due to end-of-life status. Confirm package integrity and pin configuration match the DO-35 specification. Ensure thermal management aligns with the +175 °C maximum operating limit during system integration.

Selection Notes

Select this component for designs requiring high reliability in harsh thermal environments. The DO-35 through-hole format suits legacy board layouts. Evaluate the 200 V reverse voltage margin against peak circuit transients to ensure adequate safety margins.

Part Context

This part belongs to the 1N459 series of general-purpose rectifiers manufactured by onsemi. It serves as a standard discrete semiconductor solution for basic power conversion and signal processing tasks where moderate current handling and high-temperature stability are required.

Replacement Considerations

Consult official substitution guides for compatible equivalents. Verify that alternative parts maintain identical electrical ratings and physical footprint dimensions.