1N2825RB

Overview

The Microchip Technology 1N2825RB is a high-power silicon Zener diode designed for robust voltage regulation applications. It features a nominal Zener voltage of 36V with a tight tolerance of ±5%, ensuring precise reference levels in sensitive circuits. The device is rated for a maximum power dissipation of 50W, allowing it to handle significant energy loads without thermal failure. Housed in the hermetically sealed TO-204AD (TO-3) package, it supports through-hole mounting and operates within an extended temperature range from -65°C to +175°C. Key electrical characteristics include a maximum Zener impedance of 1 Ohm and a reverse leakage current of 10 µA at 9.9V, providing stable performance under varying load conditions.

Feature Summary

• Hermetically sealed construction ensures long-term reliability in harsh environments
• High power handling capability suitable for demanding industrial regulation tasks
• Low impedance characteristic maintains stable voltage output under dynamic loads

Applications

• Industrial power supply voltage regulation
• High-power overvoltage protection circuits
• Precision voltage reference generation in aerospace systems

Procurement Notes

Verify the specific suffix RB against official Microchip documentation to confirm exact manufacturing lot codes or testing standards. Confirm RoHS compliance status as legacy TO-204 packages may have specific environmental declarations. Request the latest datasheet revision to ensure alignment with current electrical limits and mechanical drawings before finalizing procurement specifications.

Selection Notes

Select this component when high power dissipation and hermetic sealing are required for critical voltage regulation. Ensure the circuit design accommodates the thermal resistance of the TO-204AD package. Verify that the 36V nominal voltage aligns with system requirements and that the ±5% tolerance meets precision needs. Consider the operating temperature range to guarantee functionality across the intended environmental spectrum.

Part Context

This part belongs to the 1N28xx series of high-power Zener diodes manufactured by Microchip Technology. These devices are characterized by their rugged TO-204AD packaging and high wattage ratings, distinguishing them from standard signal diodes. The series is commonly utilized in applications requiring durable, high-current voltage clamping or reference solutions where standard surface-mount components would fail due to thermal or power constraints.

Replacement Considerations

Cross-reference with other manufacturers offering 50W Zener diodes in TO-204AD packages with 36V nominal voltage. Verify pinout compatibility and thermal characteristics. Ensure equivalent Zener impedance and leakage current specifications are met to maintain circuit performance without redesign.