1N3781

Single Zener Diodes Overview

The Microchip Technology 1N3781 is a single Zener diode designed for high-reliability applications. It features a nominal Zener voltage of 6.7 V with a tolerance of ±5%. The device has a maximum power dissipation of 400 mW and a maximum impedance of 10 Ohms. It is housed in a DO-7 (DO-204AA) axial through-hole package. This component conforms to MIL-PRF-19500/406 standards, ensuring suitability for environments where failure is not an option.

Single Zener Diodes Feature Summary

• Conforms to MIL-PRF-19500/406 standards for high reliability
• Temperature compensated design for stable voltage regulation
• Through-hole axial package for robust mechanical mounting

Single Zener Diodes Applications

• High-reliability voltage regulation circuits
• Military and aerospace electronic systems
• Critical protection applications where failure is not acceptable

Single Zener Diodes Procurement Notes

Verify the specific manufacturer source, as this part number may be associated with multiple vendors including Microchip Technology and historical manufacturers like Motorola. Confirm that the delivered component meets the MIL-PRF-19500/406 specification requirements. Ensure the package type matches the required DO-7 form factor for your PCB layout. Check for any ordering suffixes that might indicate specific testing or screening levels if applicable to your project's quality standards.

Single Zener Diodes Selection Notes

Select this component when a precise 6.7 V reference is needed in a rugged environment. The 400 mW power rating suits low-current regulation tasks. The axial leaded package facilitates easy insertion into through-hole boards. Consider the ±5% tolerance for budgeting voltage accuracy in your design. Verify compatibility with the operating temperature range specified in the official datasheet for your application conditions.

Single Zener Diodes Part Context

The 1N3781 belongs to a series of single Zener diodes often used in critical infrastructure. It is historically linked to military specifications, indicating a focus on durability and performance consistency over standard commercial grades. Similar parts in the series include 1N3782 and 1N3783, which offer different voltage ratings while maintaining similar reliability characteristics and package styles.

Single Zener Diodes Replacement Considerations

Publicly confirmed substitute part numbers are not explicitly listed in the provided documentation. Cross-reference with other manufacturers producing MIL-PRF-19500/406 compliant 6.7 V Zener diodes in DO-7 packages. Ensure electrical parameters such as impedance and power dissipation match or exceed the original specifications before substitution.