1N5533CUR-1/TR

Overview

The Microchip Technology 1N5533CUR-1/TR is a low voltage avalanche Zener diode with a nominal breakdown voltage of 13.0 V at a test current of 1.0 mA. It operates within a junction temperature range of -65°C to +175°C and features a maximum steady-state power dissipation of 0.5 W. The device utilizes a hermetically sealed DO-213AA MELF glass surface mount package. Electrical characteristics include a maximum Zener impedance of 0.01 Ohms, a maximum reverse current of 10 µA at 10.5 V, and a maximum noise density of 0.20 µV/√Hz.

Feature Summary

• Hermetically sealed glass MELF surface mount construction
• Internal metallurgical bond for enhanced reliability
• Qualified per MIL-PRF-19500/437 standards
• Inherently radiation hard design

Applications

• Voltage regulation over broad operating current ranges
• Temperature compensation circuits
• Reference voltage sources in harsh environments

Procurement Notes

Verify the specific suffix configuration against the datasheet nomenclature table to ensure correct tolerance and RoHS compliance status. Confirm that the 'TR' suffix indicates tape and reel packaging as specified in the mechanical section. Ensure the ordering part number matches the required military qualification level if applicable, as commercial and qualified versions share similar base identifiers but differ in testing and documentation requirements.

Selection Notes

Select this component when a stable 13.0 V reference is required in a compact surface mount form factor. The DO-213AA package suits automated assembly processes while maintaining hermetic sealing. Consider the low dynamic impedance and minimal capacitance for applications requiring precise signal integrity. Verify thermal derating curves against the expected ambient temperature and mounting conditions to ensure operation remains within the 0.5 W power limit.

Part Context

This device belongs to the 1N5518BUR-1 through 1N5546BUR-1 series of 0.5 watt glass surface mount Zener voltage regulators. The series provides voltages from 3.3 to 33 volts with various tolerance options. The 1N5533 variant specifically targets the 13.0 V segment, offering tight impedance and noise specifications suitable for precision analog applications requiring radiation hardness and long-term stability.

Replacement Considerations

Direct substitutes include other 1N5533 variants with compatible tolerances (e.g., 1N5533B-1, 1N5533C-1) provided the package and electrical limits match. Cross-referencing with MIL-PRF-19500/437 qualified equivalents from other manufacturers may be necessary for specific military procurement requirements.