1N4125UR/TR

Single Zener Diodes Overview

The Microchip Technology 1N4125UR/TR is a glass surface mount Zener voltage regulator in the DO-213AA (SOD80/MLL34) MELF package. It provides a nominal Zener voltage of 47 V with a standard tolerance of ±5%. The device operates at a test current of 250 µA and exhibits a maximum Zener impedance of 250 Ω. Rated for 0.5 watts steady-state power dissipation, it functions within an operating temperature range of -65°C to +175°C. The TR suffix indicates tape and reel packaging.

Single Zener Diodes Feature Summary

• Hermetically sealed glass surface mount construction
• Inherently radiation hard design
• ESD insensitive per MIL-STD-750 Method 1020
• Minimal capacitance characteristics

Single Zener Diodes Applications

• Voltage regulation in harsh environments
• Radiation-hardened circuit protection
• Precision reference applications requiring low noise

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm compliance requirements. Confirm that the TR suffix corresponds to the required tape and reel quantity and dimensions. Ensure the component meets the necessary environmental and qualification standards for the intended application before procurement.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed surface mount Zener diode is required for high-reliability applications. Consider the 47 V nominal voltage and 250 Ω impedance for circuits needing stable regulation. Evaluate the thermal resistance and power derating curves to ensure adequate heat dissipation within the specified temperature limits.

Single Zener Diodes Part Context

This part belongs to the 1N4099UR through 1N4135UR series of 0.5-watt glass surface mount Zeners. These devices serve as surface mount equivalents to JEDEC registered axial-leaded parts. The series offers a wide selection of voltages from 1.8 to 100 V with standard 5% tolerances.

Single Zener Diodes Replacement Considerations

JEDEC registered axial-leaded equivalents include the 1N4125. Surface mount alternatives within the same family are available under the MLL4125 designation.