1N2825B

Overview

The Microchip Technology 1N2825B is a 50-watt silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 36V with a tolerance of 5%. The device operates in the through-hole DO-204AD (TO-3) package and supports a maximum operating temperature of +200°C. Key electrical characteristics include a maximum reverse leakage current of 10µA and a Zener impedance of 1Ω at the test current. This component is suitable for high-power circuit protection and reference voltage generation.

Feature Summary

• High power dissipation capability of 50 watts for robust thermal performance
• Hermetically sealed construction ensuring reliability in harsh environments
• Low Zener impedance for stable voltage regulation under varying load conditions

Applications

• High-power voltage regulation circuits
• Overvoltage protection systems
• Precision voltage reference sources

Procurement Notes

Verify the specific suffix code to confirm package type and compliance status, as variations exist within the product line. Confirm RoHS and hermetic sealing requirements against the datasheet before ordering. Check for lead-free availability if required by assembly processes. Ensure the supplier provides official Microchip documentation to validate authenticity and traceability.

Selection Notes

Select this component when a 36V regulation point is required with significant power handling needs. The TO-3 package necessitates appropriate heatsinking strategies due to the 50W rating. Evaluate thermal resistance parameters to ensure junction temperatures remain within safe limits during continuous operation. Compare impedance values against other series options if tighter voltage stability is critical.

Part Context

This part belongs to the standard 1N28xx series of high-power Zener diodes manufactured by Microchip Technology. These devices are widely used in industrial and military applications where reliability and power density are paramount. The series offers various voltage ratings while maintaining consistent mechanical and electrical characteristics across the range.

Replacement Considerations

Cross-reference with other manufacturers' 50W Zener diodes rated at 36V ±5% in TO-3 packages. Verify pinout compatibility and thermal interface dimensions before substitution. Ensure equivalent Zener impedance and leakage current specifications are met to maintain circuit performance.