1N5523

Overview

The Microchip Technology 1N5523 is a single Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 5.1 V with a test current of 5 mA. The device supports a maximum power dissipation of 500 mW and exhibits a Zener impedance of 26 Ohms at the specified test current. Reverse leakage current is limited to 2 µA. The component operates within a temperature range of -65 °C to +175 °C junction temperature. Voltage tolerance varies by suffix, typically ±2% or ±5%. Available packages include DO-213AA (MELF) for surface mount and DO-204AH (DO-35) for through-hole mounting.

Feature Summary

• Provides stable voltage reference using double plug construction and metallurgical bonding for low noise characteristics.
• Offers low reverse leakage current suitable for precision regulation circuits.
• Supports extended operating temperatures up to +175 °C for harsh environment reliability.

Applications

• Precision voltage reference circuits
• Overvoltage protection in sensitive electronics
• Voltage clamping applications

Procurement Notes

Verify the specific suffix code (e.g., B, C, D, BUR) to confirm voltage tolerance, package type, and compliance status. Suffixes determine whether the part is available in DO-35 axial leaded or DO-213AA MELF formats. Confirm RoHS and MIL-PRF-19500 qualification requirements against the specific orderable part number before procurement.

Selection Notes

Select the appropriate suffix based on required voltage tolerance and mounting style. The 'B' suffix typically denotes 5% tolerance in DO-35, while 'C' indicates 2% tolerance. Surface mount designs require the 'BUR' variant in DO-213AA packaging. Ensure the 500 mW power rating accommodates the expected thermal load in the final assembly.

Part Context

The 1N5523 belongs to the 1N5518B through 1N5546B series of low noise Zener diodes manufactured by Microchip Technology. This series is characterized by double plug construction and metallurgically bonded elements to minimize electrical noise. The components are available in both standard glass axial leads and hermetic MELF packages to support diverse manufacturing needs.

Replacement Considerations

Direct parameter equivalents include 1N5523B, 1N5523C, and 1N5523D from Microchip Technology. Cross-manufacturer replacements must match the 5.1 V Zener voltage, 500 mW power rating, and 26 Ohm impedance specifications. Package compatibility requires matching DO-35 or DO-213AA footprints.