1N5529B

Overview

The Microchip Technology 1N5529B is a low voltage avalanche Zener diode rated at 0.5 W, housed in a hermetically sealed axial-lead glass DO-35 (DO-204AH) package. It provides a nominal Zener voltage of 9.1 V with a standard tolerance of ±5%. The device operates within a junction and storage temperature range of -65°C to +175°C. Key electrical parameters include a maximum reverse leakage current of 7.0 µA at 8.2 V, a maximum dynamic impedance of 45 Ohms at the test current of 1 mA, and a maximum forward voltage of 1.1 V at 200 mA.

Feature Summary

• Hermetically sealed glass construction for environmental protection
• Low noise density suitable for precision regulation applications
• Inherently radiation hard design
• ESD nonsensitive per MIL-STD-750 Method 1020

Applications

• Voltage regulation over broad operating current and temperature ranges
• Precision reference circuits requiring minimal capacitance
• Harsh environment electronics requiring radiation hardness

Procurement Notes

Verify that the specific ordering suffix matches the required military qualification level (JAN, JANTX, or JANTXV). Confirm RoHS compliance status if applicable, as commercial versions may differ from qualified levels. Ensure the metallurgical bond option is specified if required by the system design. Cross-reference the JEDEC type number against the datasheet electrical characteristics table to confirm parameter limits.

Selection Notes

Select this component when a 9.1 V Zener voltage with ±5% tolerance is required in an axial-lead package. Consider the 0.5 W power dissipation limit and derating curves for thermal management. Evaluate the dynamic impedance and noise density specifications against circuit sensitivity requirements. Verify compatibility with through-hole mounting processes and lead solderability standards.

Part Context

This part belongs to the 1N5518B through 1N5546B series of 0.5 W axial-leaded glass Zener Voltage Regulators. The series offers voltage selections from 3.3 V to 33 V with various tolerance options. These devices are designed for applications requiring reliable voltage regulation in demanding environments.

Replacement Considerations

Equivalent parts must match the 9.1 V nominal voltage, 0.5 W power rating, and DO-35 package form factor. Verify that replacement components meet the same electrical limits for leakage current, impedance, and temperature range.