1N5528BUR-1

Overview

The Microchip Technology 1N5528BUR-1 is a low voltage avalanche Zener diode rated at 0.5 W, qualified per MIL-PRF-19500/437 for JAN, JANTX, and JANTXV levels. It features an internal metallurgical bond within a hermetically sealed glass DO-213AA MELF package. The nominal Zener voltage is 8.2 V with a 5% tolerance (B suffix), tested at 1 mA. Maximum reverse current is 0.5 µA at 6.5 V, and dynamic impedance is 40 Ohms at test current.

Feature Summary

• Hermetically sealed surface mount construction with internal metallurgical bonding
• Qualified to JAN, JANTX, and JANTXV military standards
• Inherently radiation hard design
• Minimal capacitance characteristics

Applications

• Voltage regulation over broad operating current and temperature ranges
• Spacecraft avionics data acquisition systems
• Radiation-hardened electronic circuits

Procurement Notes

Verify the specific reliability level required (JAN, JANTX, or JANTXV) as these are distinct qualification tiers under MIL-PRF-19500/437. Confirm RoHS compliance status if applicable, noting that compliant versions are available on commercial grades only. Ensure the metallurgical bond option (-1 suffix) matches the design requirements for high-reliability environments.

Selection Notes

Select this component when a hermetically sealed surface mount Zener regulator is needed for harsh environments. The 1N5528 variant provides an 8.2 V reference point. Consider the 5% tolerance standard unless tighter specifications require alternative suffixes. Verify thermal derating curves against the expected ambient temperature and mounting conditions on FR4 PCBs.

Part Context

This device belongs to the 1N5518BUR-1 through 1N5546BUR-1 series of 0.5 W glass surface mount Zener regulators. The series covers voltages from 3.3 V to 33 V. The 1N5528BUR-1 specifically addresses the 8.2 V segment of this range, offering a surface mount equivalent to the traditional axial-leaded JEDEC registered 1N5528.

Replacement Considerations

The datasheet identifies the 1N5528B-1 thru 1N5546B-1 series in DO-35 (DO-204AH) axial-leaded packages as the corresponding traditional equivalents.