1N4120UR-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N4120UR-1/TR is a glass surface mount Zener voltage regulator with a nominal breakdown voltage of 30 V. It operates within a standard tolerance of ±5% and features a maximum Zener impedance of 0.01 Ω at a test current of 250 µA. The device dissipates up to 0.5 W and maintains functionality across an operating temperature range from -65°C to +175°C. Packaged in a hermetically sealed DO-213AA (MLL) case, it utilizes tape and reel packaging for automated assembly.

Single Zener Diodes Feature Summary

• Hermetically sealed glass MELF-style package providing environmental protection
• Inherently radiation hard construction suitable for harsh environments
• ESD insensitive performance verified per MIL-STD-750 Method 1020
• Capable of regulating voltage over a broad operating current and temperature range

Single Zener Diodes Applications

• Voltage regulation in aerospace and defense circuits
• Reference voltage sources in high-reliability electronics
• Overvoltage protection in radiation-exposed environments

Single Zener Diodes Procurement Notes

Verify the specific suffix configuration against the official datasheet to ensure correct package and termination specifications. Confirm that the required military or tight-tolerance variants are sourced correctly, as standard and metallurgical bond options differ. Cross-reference the manufacturer part number with the distributor listing to validate authenticity and revision level before procurement.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed surface mount Zener diode is required for high-temperature or radiation-hardened applications. Ensure the circuit design accommodates the 0.5 W power dissipation limit and the specific thermal resistance characteristics of the DO-213AA package. Verify that the 30 V breakdown voltage aligns with the target regulation requirements.

Single Zener Diodes Part Context

This device belongs to the 1N4099UR through 1N4135UR series of 0.5 W glass surface mount Zeners. It serves as the SMD equivalent to JEDEC registered axial-leaded parts like the 1N4120. The series covers voltages from 1.8 V to 100 V, offering standard 5% tolerances or tighter options via specific suffixes.

Single Zener Diodes Replacement Considerations

Direct equivalents include the MLL4120 designation. For axial leaded replacements, the 1N4120 is the corresponding JEDEC registered part. Military qualified versions such as JANTX1N4120 may be considered if higher reliability standards are required.