1N458

Single Diodes Overview

The Microchip Technology 1N458 is a JEDEC registered switching diode qualified per MIL-PRF-19500/193. It features a hermetically sealed DO-35 package with double-plug construction and metallurgical bonding. The device supports a maximum average DC output current of 150 mA at +25°C and a steady-state power dissipation of 500 mW. Electrical characteristics include a forward voltage of 1.0 V at 100 mA, a working peak reverse voltage of 125 V, and a maximum reverse voltage of 150 V. Reverse leakage currents are specified as 25 nA at VRWM and 1 µA at VRM.

Single Diodes Feature Summary

• Hermetically sealed glass package with double-plug construction for reliable performance in fast switching applications.
• Metallurgically bonded junctions ensure structural integrity and consistent electrical characteristics.
• JAN qualification available per MIL-PRF-19500/193 for high-reliability environments.

Single Diodes Applications

• RS-232 and RS-422 interface networks
• Ethernet 10 Base T links
• Switching core drivers
• Local area networks

Single Diodes Procurement Notes

Verify the specific revision level and qualification grade (Commercial vs. JAN) required for the target application. Confirm RoHS compliance status if environmental regulations apply, noting that compliant versions are available only on commercial grades. Ensure the ordering suffix matches the desired terminal plating and packaging configuration to avoid supply discrepancies.

Single Diodes Selection Notes

Select this component for high-density mounting scenarios requiring flexible through-hole leads. Evaluate the 125 V working peak reverse voltage against circuit transient requirements. Consider the 150 mA average current rating for load conditions. Verify thermal derating requirements for operation above +25°C ambient temperature to maintain safe junction temperatures within the specified limits.

Single Diodes Part Context

This part belongs to the 1N457A through 1N459A series of small low-capacitance signal diodes. These devices are designed for high-frequency data lines and computer applications. The series shares common mechanical dimensions and packaging styles, differing primarily in reverse voltage ratings and specific forward current limits.

Single Diodes Replacement Considerations

Direct substitutes must match the DO-35 package, 150 V maximum reverse voltage, and 150 mA current rating. Verify compatibility with MIL-PRF-19500/193 standards if JAN qualification is mandatory. Cross-reference forward voltage and leakage current specifications to ensure circuit performance remains unaffected.