1N4128UR-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N4128UR-1/TR is a glass surface mount Zener voltage regulator with a nominal breakdown voltage of 60 V. It operates within a temperature range of -65°C to +175°C and dissipates up to 0.5 watts at an end cap temperature below 100°C. The device features a maximum Zener impedance of 400 Ohms and a reverse leakage current of 40 µA at 45.6 V. Packaged in the DO-213AA (SOD80) MELF style, it utilizes tape and reel packaging for automated assembly.

Single Zener Diodes Feature Summary

• Hermetically sealed glass DO-213AA package
• Internal metallurgical bond construction
• Radiation hard design
• ESD insensitive per MIL-STD-750 Method 1020

Single Zener Diodes Applications

• Voltage regulation in harsh environments
• Reference voltage sources
• Overvoltage protection circuits

Single Zener Diodes Procurement Notes

Verify that the ordering suffix correctly identifies the specific tolerance level and packaging configuration required for the application. Confirm compliance with RoHS standards if applicable. Ensure the procurement documentation matches the exact part number designation to avoid discrepancies in electrical characteristics or physical dimensions.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed surface mount Zener diode is required for high-reliability applications. The internal metallurgical bond provides enhanced stability compared to standard glass passivated devices. Consider the thermal resistance and power derating requirements when designing the PCB footprint to ensure reliable operation under steady-state conditions.

Single Zener Diodes Part Context

This device belongs to the 1N4099UR through 1N4135UR series of 0.5-watt glass surface mount Zener regulators. It serves as the surface mount equivalent to the JEDEC registered axial-leaded 1N4128 series. The -1 suffix indicates the availability of internal metallurgical bonding options, which are often specified for military and aerospace qualifications.

Single Zener Diodes Replacement Considerations

Direct equivalents include the MLL4128 and the axial-leaded 1N4128. Verify that any replacement maintains the required hermetic seal and metallurgical bond specifications if used in radiation-hardened or high-reliability designs.