1N4509

Single Diodes Overview

The Microchip Technology 1N4509 is a silicon power rectifier designed for general-purpose applications. It features a glass passivated die and glass-to-metal construction, providing robust performance in high-temperature environments. The device supports an operational temperature range from 0°C to 175°C and offers a surge rating of 250A. Key electrical specifications include a maximum repetitive peak reverse voltage (VRRM) of 800V and a forward current (Iout) of 12A.

Single Diodes Feature Summary

• Glass passivated die for enhanced reliability
• Low forward voltage drop characteristics
• High surge current capability
• Glass-to-metal package construction

Single Diodes Applications

• General-purpose power rectification
• Industrial power supplies
• Battery charging circuits

Single Diodes Procurement Notes

Verify the manufacturer designation as Microchip Technology or its predecessor entities such as Microsemi Corporation when sourcing this component. Confirm that the part number corresponds to the 800V, 12A specification. Ensure the package type matches the required DO-201AD or equivalent axial leaded format. Check for any specific suffixes that might indicate tolerance variations or packaging differences.

Single Diodes Selection Notes

Select the 1N4509 when an 800V reverse voltage rating and 12A continuous forward current are required. Consider its 175°C operating temperature limit for high-thermal environments. The glass passivation makes it suitable for applications demanding long-term stability. Compare against similar rectifiers if higher current or different voltage ratings are needed.

Single Diodes Part Context

This component belongs to the standard silicon power rectifier family, historically associated with Microsemi Corporation before its acquisition by Microchip Technology. It is commonly used in industrial and commercial power conversion systems where reliable rectification at moderate currents and high voltages is essential. The part is widely recognized in legacy designs and modern equivalents.

Single Diodes Replacement Considerations

Equivalent parts include the 1N4508 (600V variant) and other 12A/800V rectifiers from manufacturers like Vishay or onsemi. Verify pin compatibility and thermal resistance when substituting. Ensure the replacement maintains the same glass passivation and surge rating requirements.