1N4122UR-1

Single Zener Diodes Overview

The 1N4122UR-1 is a Zener diode manufactured by Microchip Technology, designed for voltage regulation applications. It features a nominal Zener voltage of 36V with a tolerance of 5% and a maximum power dissipation of 0.5W (500mW). The device utilizes silicon technology and is housed in a DO-213AA (MELF) package. Key electrical characteristics include a maximum dynamic impedance of 200 ohms and a maximum reverse leakage current of 10nA at 27.4V. It operates within a temperature range of -65°C to +175°C.

Single Zener Diodes Feature Summary

• Constructs with an internal metallurgical bond for enhanced reliability
• Hermetically sealed glass encapsulation suitable for harsh environments
• Qualified for high-reliability aerospace and defense applications

Single Zener Diodes Applications

• Voltage reference circuits in military avionics systems
• Overvoltage protection in space-grade electronic equipment
• Precision voltage regulation in radiation-hardened devices

Single Zener Diodes Procurement Notes

Verify the specific qualification level (JAN, JANTX, JANTXV, or JANS) required for your application, as performance specifications vary significantly between commercial and military grades. Confirm RoHS compliance status, as this component may be non-compliant depending on the specific revision. Ensure the MELF package orientation matches your PCB footprint design. Request full test data sheets from authorized distributors to validate electrical parameters against your system requirements before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed, high-reliability Zener diode is required for critical systems. The 36V rating and 500mW power handling make it suitable for moderate voltage regulation tasks. Consider the DO-213AA package constraints regarding soldering profiles and thermal management. Compare against standard commercial equivalents if environmental sealing and MIL-PRF-19500 qualification are not mandatory for the target application.

Single Zener Diodes Part Context

This part belongs to the 1N4122 series of Zener diodes produced by Microchip Technology (formerly Microsemi). The series is known for its use in high-reliability sectors such as aerospace and defense. The 'UR' suffix typically denotes the MELF package variant, distinguishing it from axial-leaded versions like the 1N4122-1. These components are often qualified under MIL-PRF-19500 standards to ensure performance in extreme conditions.

Single Zener Diodes Replacement Considerations

• 1N4122CUR-1
• JANTXV1N4122CUR-1