1N5524B (DO35)

Overview

The Microsemi 1N5524B is a low voltage avalanche Zener diode with a nominal breakdown voltage of 5.6 V and a maximum power dissipation of 0.5 W. It utilizes a hermetically sealed glass DO-35 (DO-204AH) axial-lead package. The device operates within a junction temperature range of -65 °C to +175 °C. Qualified per MIL-PRF-19500/437, it offers standard ±5% voltage tolerance and features minimal capacitance.

Feature Summary

• Hermetically sealed glass DO-35 axial-lead construction
• Qualified for JAN, JANTX, and JANTXV military reliability levels
• Inherently radiation hard design
• Minimal capacitance characteristics

Applications

• Voltage regulation over broad operating current and temperature ranges
• Low noise signal processing circuits
• Radiation-hardened electronic systems

Procurement Notes

Verify the specific qualification level required, as the base part number may be prefixed with JAN, JANTX, or JANTXV to denote different reliability screening standards. Confirm metallurgical bond availability if specified by suffix requirements. Ensure compliance with RoHS regulations if applicable, noting that commercial versions are available separately from military qualified units.

Selection Notes

Select this component for applications requiring stable voltage reference in harsh environments due to its radiation hardness and wide thermal operating range. Consider the internal metallurgical bond option for enhanced mechanical stability under high vibration conditions. Verify that the 0.5 W steady-state power rating aligns with the circuit's thermal dissipation needs at the intended ambient temperature.

Part Context

This device belongs to the 1N5518 thru 1N5546 series of 0.5 watt Zener Voltage Regulators. The series provides a selection of voltages ranging from 3.3 to 33 volts with various tolerance options. These components are designed for use where reliable voltage regulation is critical in demanding industrial and aerospace applications.

Replacement Considerations

Equivalent parts include other manufacturers' 1N5524 variants meeting MIL-PRF-19500/437 specifications. Commercial equivalents such as 1N5524BE3 offer similar electrical parameters but lack military qualification.