1N990BUR-1

Single Zener Diodes Overview

The Microchip Technology 1N990BUR-1 is a silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 160 V with a tolerance of ±5%. The device operates at a maximum power dissipation of 0.5 W (500 mW) and is housed in a surface-mount DO-213AA (MELF) package. Key electrical parameters include a maximum dynamic impedance of 1700 Ω, a knee impedance of 6500 Ω, and a maximum forward voltage of 1.3 V. The component supports operating temperatures up to 175 °C.

Single Zener Diodes Feature Summary

• Hermetically sealed leadless glass MELF package for high reliability
• Silicon planar construction for stable voltage regulation
• Qualified per MIL-PRF-19500 standards for military-grade performance

Single Zener Diodes Applications

• High-reliability voltage reference circuits
• Over-voltage protection in aerospace systems
• Precision voltage regulation in harsh environments

Single Zener Diodes Procurement Notes

Verify the specific suffix (e.g., BUR-1) against the official Microchip datasheet to confirm package type and qualification level. Ensure the order matches the required MIL-PRF-19500 compliance if applicable. Confirm RoHS status as non-compliant for this specific part number. Request current factory availability due to specialized manufacturing requirements.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed, high-reliability Zener diode is required for space-constrained designs. The DO-213AA package offers surface-mount convenience while maintaining ruggedness. Consider the 160 V rating and 0.5 W power limit to ensure adequate headroom for the target application's voltage and thermal conditions.

Single Zener Diodes Part Context

This part belongs to the 1N990 series of silicon Zener diodes manufactured by Microchip/Microsemi. These devices are engineered for demanding environments where standard commercial components may fail. The series includes various voltage ratings within the same physical footprint, allowing for design flexibility while maintaining consistent mechanical and environmental specifications across the product line.

Single Zener Diodes Replacement Considerations

Direct substitutes include other MIL-PRF-19500 qualified Zener diodes with identical 160 V ratings and DO-213AA packages. Verify that any replacement maintains the same hermetic seal and temperature range. Cross-reference with JAN1N990BUR-1 variants to ensure compatibility with existing board layouts and regulatory requirements.