1N6491

Overview

The Microchip Technology 1N6491 is a single Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 5.6 V with a tolerance of 5%. The device operates in the DO-204AE (DO-41) axial leaded package and supports surface mount or through-hole mounting styles depending on specific suffixes. It dissipates up to 1.5 W of power at ambient temperatures, maintaining functionality across an extended temperature range from -65°C to +175°C. Key electrical characteristics include a maximum reverse leakage current of 500 nA and a Zener impedance of 5 Ohms measured at a test current of 45 mA.

Feature Summary

• Provides stable voltage reference capabilities within specified operating conditions
• Engineered for high thermal stability across extreme industrial temperature ranges
• Features low leakage current to ensure precise regulation performance

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in power supply designs
• Clamping applications for transient suppression

Procurement Notes

Verify exact ordering suffixes such as US or TR to confirm package type and reel specifications. Confirm RoHS compliance status as it varies by manufacturing batch. Ensure the selected variant matches the required mounting style for your PCB layout. Cross-reference datasheet parameters against your specific circuit requirements before finalizing procurement decisions.

Selection Notes

Select this component when a 5.6 V regulation point is required with high thermal endurance. Consider the 1.5 W power dissipation capability for heat management strategies. Evaluate the 5 Ohm impedance for noise sensitivity in sensitive analog sections. Compare against alternative packages if space constraints dictate SMD versus axial lead configurations.

Part Context

This part belongs to the standard Zener diode family manufactured by Microchip Technology. It serves as a fundamental passive component for biasing and regulation tasks. The product line emphasizes reliability and wide temperature operation suitable for demanding environments. It complements other discrete semiconductor solutions offered by the manufacturer.

Replacement Considerations

Direct substitutes include JANTXV1N6491 for military-grade variants. Equivalent parts from other manufacturers must match the 5.6 V Zener voltage and 1.5 W power rating. Verify pinout compatibility and package dimensions before substitution.