1N4958US/TR

Overview

The 1N4958US/TR is a single Zener diode manufactured by Microchip Technology, designed for surface-mount applications. It features a nominal Zener voltage of 10 V with a tolerance of ±2%. The device operates within a temperature range of -65°C to +175°C and dissipates up to 5 W of power. Key electrical characteristics include a maximum reverse leakage current of 25 µA, a Zener impedance of 2 Ohms, and a test current of 125 mA. It utilizes the D-5B-2 package.

Feature Summary

• Provides precise voltage regulation with a tight 2% tolerance at 10 V.
• Engineered for high-temperature reliability with an extended operating range up to 175°C.
• Features low Zener impedance for stable performance under varying load conditions.

Applications

• Precision voltage reference circuits in harsh environments
• Over-voltage protection in aerospace systems
• Voltage clamping in high-reliability industrial electronics

Procurement Notes

Verify the JAN prefix indicates military-grade qualification when sourcing this component. Confirm the specific suffix matches the required tolerance and packaging format. Ensure compatibility with RoHS exemptions if applicable. Cross-reference datasheet revisions to confirm parameter consistency before integration into final designs.

Selection Notes

Select this variant for applications requiring superior voltage accuracy compared to standard commercial grades. The low impedance value supports stable regulation in sensitive analog circuits. Verify that the surface-mount footprint aligns with the PCB layout constraints. Consider the thermal management requirements associated with the 5 W power dissipation rating during operation.

Part Context

This component belongs to the 1N4958 series of Zener diodes produced by Microchip Technology. It represents a surface-mount version of the traditional axial leaded 1N4958, offering similar electrical performance in a compact form factor suitable for automated assembly processes.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult manufacturer cross-reference guides for equivalent military-grade or commercial alternatives if direct substitution is required.