1N5526

Overview

The Microchip Technology 1N5526 is a low voltage avalanche Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 6.8 V with a standard tolerance of ±5%. The device has a maximum power dissipation of 500 mW and operates within a temperature range of -65°C to +175°C junction temperature. Key electrical parameters include a maximum dynamic impedance of 30 Ohms at the test current and a reverse leakage current of 1 µA at 6.2 V. The component is available in axial-lead DO-35 glass packages or leadless surface-mount configurations.

Feature Summary

• Provides stable voltage regulation using low voltage avalanche characteristics
• Constructed with hermetically sealed glass axial-lead or leadless packages
• Features metallurgical bond options for enhanced reliability in harsh environments

Applications

• Precision voltage reference circuits
• Overvoltage protection stages
• Clamping applications in sensitive electronic systems

Procurement Notes

Verify specific suffix codes (e.g., B, C, -1) against official datasheets to confirm tolerance levels and package types. Ensure compliance with environmental directives such as RoHS if required by the design. Confirm that the selected variant meets the necessary MIL-PRF-19500 qualifications for aerospace or military use cases.

Selection Notes

Select the appropriate tolerance grade based on circuit precision requirements, noting that the standard B suffix typically denotes ±5% while other suffixes may offer tighter tolerances. Consider the operating temperature range and thermal management needs given the 500 mW power rating. Choose between axial-lead and surface-mount packages based on board layout constraints and assembly methods.

Part Context

This component belongs to the 1N5518 through 1N5546 series of 0.5 W Zener diodes manufactured by Microchip Technology. The series offers a wide selection of voltages from 3.3 V to 33 V. These devices are widely used in general-purpose electronics and specialized industrial applications requiring reliable voltage regulation.

Replacement Considerations

Direct parameter-equivalent replacements include the 1N5526B and 1N5526C variants from Microchip Technology. Other manufacturers producing 6.8 V, 500 mW Zener diodes in DO-35 packages may serve as functional substitutes if electrical specifications align.