1N5294

Overview

The Microchip Technology 1N5294 is a silicon planar junction Zener diode designed for voltage regulation and reference applications. It features a glass passivated junction and is available in the DO-35 axial leaded package, which facilitates automated insertion. The device provides stable voltage regulation with low impedance characteristics. Key electrical parameters include a nominal Zener voltage of 100 V at a test current of 2.6 mA. The maximum Zener impedance is specified at 70 ohms under these conditions. The device operates within a temperature range of -65°C to +175°C, ensuring reliability in demanding environments. Power dissipation is rated at 500 mW.

Feature Summary

• Glass passivated junction for enhanced environmental stability
• Axial leaded package suitable for through-hole mounting
• High thermal stability across extended temperature ranges

Applications

• Voltage reference circuits requiring high precision
• Overvoltage protection in electronic systems
• Clamping applications in signal processing paths

Procurement Notes

Verify the specific ordering suffix to confirm exact electrical tolerances and packaging options. Ensure compatibility with existing board layouts regarding axial lead spacing. Confirm that the selected variant meets the required power dissipation and thermal management specifications for the intended application environment.

Selection Notes

Select this component when a precise 100 V regulation point is required in a compact axial package. Consider the 500 mW power rating and thermal resistance when designing heat dissipation strategies. Evaluate the Zener impedance specification against circuit sensitivity requirements to ensure adequate noise performance and regulation accuracy under varying load conditions.

Part Context

This component belongs to the standard 1N series of Zener diodes, widely used in discrete semiconductor applications. It serves as a fundamental passive element for establishing fixed voltage levels in analog and digital circuits. The DO-35 package represents a traditional form factor still prevalent in legacy designs and specific industrial equipment requiring robust axial leads.

Replacement Considerations

Substitute parts must match the 100 V Zener voltage, 500 mW power rating, and DO-35 package dimensions. Verify equivalent Zener impedance and test current specifications to maintain circuit performance. Cross-reference manufacturer datasheets for thermal characteristics and reverse leakage current limits.