1N4709UR-1/TR

Overview

The Microchip Technology 1N4709UR-1/TR is a surface mount Zener voltage regulator in the 1N4678UR-1 through 1N4717UR-1 series. It features a hermetically sealed glass DO-213AA (MELF) package with internally metallurgically bonded metal slugs for high reliability. The device provides a nominal Zener voltage of 24.0 V with a standard tolerance of +/-5%. Electrical characteristics include a Zener test current of 50 µA, a maximum reverse leakage current of 0.01 µA at VR, and a maximum DC Zener current of 19.0 mA. It supports a steady-state power dissipation of 0.5 W and operates within a junction temperature range of -65 to +175 °C.

Feature Summary

• Hermetically sealed glass DO-213AA MELF package with internal metallurgical bonding
• Surface mount equivalent of JEDEC registered 1N4678 thru 1N4717 series
• Inherently radiation hard design
• Non-sensitive to electrostatic discharge per MIL-STD-750 method 1020

Applications

• Voltage regulation over broad operating current and temperature ranges
• High-reliability electronic circuits requiring radiation hardness
• Applications necessitating minimal capacitance

Procurement Notes

Verify the specific part number suffix against official documentation to confirm RoHS compliance status and screening levels. The 'TR' suffix indicates tape and reel packaging per EIA-481-1-B standards. Confirm that the required voltage tolerance matches the standard 5% option unless a specific tighter tolerance variant is designated. Ensure procurement channels provide valid traceability for the manufacturer's reliability specifications.

Selection Notes

Select this component when a surface mount Zener diode with hermetic sealing and radiation hardness is required. The 1N4709UR-1 offers a 24.0 V nominal breakdown with a low test current of 50 µA. Consider the 0.5 W power dissipation limit and the -65 to +175 °C operating temperature range. Verify if the standard 5% tolerance meets circuit requirements or if tighter options are necessary.

Part Context

This device belongs to the 1N4678UR-1 through 1N4717UR-1 series of 0.5 watt glass surface mount Zener voltage regulators. These components serve as surface mount equivalents to the traditional JEDEC registered 1N4678 through 1N4717 axial leaded series. The series covers a voltage selection from 1.8 to 43 volts, utilizing a consistent DO-213AA package construction with metallurgically bonded metal slabs.

Replacement Considerations

Direct replacements include other manufacturers' DO-213AA (MLL34/SOD80) Zener diodes rated at 24 V with 500 mW power dissipation. For equivalent performance, verify that substitute parts meet the same hermetic sealing, radiation hardness, and temperature range specifications.