1N5525BUR-1/TR

Overview

The Microchip Technology 1N5525BUR-1/TR is a low voltage avalanche Zener diode designed for surface mount applications. It provides a nominal Zener voltage of 6.2 V with a standard tolerance of ±5%. The device features a maximum power dissipation of 500 mW and operates within a temperature range of -65°C to +175°C. Key electrical parameters include a maximum reverse leakage current of 1 µA at 5 V, a Zener impedance of 30 Ohms, and a forward voltage of 1.1 V at 200 mA. It is housed in the DO-213AA package.

Feature Summary

• Qualified per MIL-PRF-19500/437 military standards
• Utilizes glass surface mount construction with internal metallurgical bond option
• Designed for low voltage regulation applications

Applications

• Spacecraft avionics data acquisition systems
• Military electronic circuits requiring high reliability
• Voltage reference stages in precision instrumentation

Procurement Notes

Verify that the specific suffix /TR indicates tape and reel packaging if required by automated assembly processes. Confirm the exact qualification level (JAN, JANTX, or JANTXV) matches the project requirements, as these designations affect performance specifications and compliance documentation. Ensure the DO-213AA footprint aligns with the PCB layout.

Selection Notes

Select this component when a robust, space-grade Zener regulator is needed for low voltage levels around 6.2 V. The surface mount DO-213AA package facilitates automated placement. Consider the 500 mW power rating and wide operating temperature range for harsh environments. Verify that the 30 Ohm impedance meets the circuit's noise and regulation constraints.

Part Context

This part belongs to the 1N5518BUR-1 through 1N5546BUR-1 series of 0.5 W glass surface mount Zener diodes. The series covers voltages from 3.3 V to 33 V. The 'B' suffix typically denotes the standard ±5% tolerance. These devices are specifically engineered for military and aerospace applications demanding high reliability and radiation hardness.

Replacement Considerations

Direct equivalents include JAN1N5525BUR-1 and other variants within the 1N5525 family. Cross-reference with other manufacturers' MIL-PRF-19500/437 qualified parts if supply chain diversification is necessary. Ensure any substitute maintains the DO-213AA package and 6.2 V Zener voltage specification.