1N4717UR-1/TR

Overview

The Microchip Technology 1N4717UR-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 an internal metallurgical bond for high reliability. The device provides a nominal Zener voltage of 43 V with a standard tolerance of +/-5%. Electrical characteristics are defined at a test current of 50 µA, including a maximum reverse leakage current of 0.01 µA and a maximum DC Zener current of 11.0 mA. The component supports a steady-state power dissipation of 0.5 W and operates within a junction temperature range of -65°C to +175°C.

Feature Summary

• Hermetically sealed glass MELF package construction
• Internal metallurgical bond between metal slugs and silicon die
• Low test current requirement of 50 µA
• Radiation hard design

Applications

• Voltage regulation over broad operating current and temperature ranges
• High-reliability electronic circuits requiring ESD robustness
• Space or aerospace applications utilizing radiation-hardened components

Procurement Notes

Verify the specific suffix configuration against official datasheets to confirm RoHS compliance status and screening levels. The TR suffix indicates tape and reel packaging per EIA-481-1-B standards. Ensure that the selected variant matches the required voltage tolerance and metallurgical bonding specifications for the intended application environment.

Selection Notes

Select this component when a hermetically sealed surface mount Zener diode is required for high-reliability designs. The 1N4717UR-1 offers a 43 V breakdown voltage suitable for higher voltage regulation tasks within the series. Consider the low capacitance and radiation hardness for sensitive environments. Verify thermal derating requirements based on the FR4 PCB footprint and ambient temperature conditions.

Part Context

This part belongs to the 1N4678UR-1 through 1N4717UR-1 series of 0.5-watt glass surface mount Zener voltage regulators. These devices serve as the surface mount equivalents of the JEDEC registered axial-leaded 1N4678 through 1N4717 series. The series covers a voltage selection from 1.8 to 43 volts, providing options for standard 5% tolerances as well as tighter 1% and 2% variations.

Replacement Considerations

Equivalent axial-leaded versions include the 1N4717-1. Surface mount alternatives within the same family include variants with different voltage ratings such as 1N4716UR-1 or 1N4718UR-1 if voltage adjustments are permissible.