1N4704UR-1

Overview

The 1N4704UR-1 is a surface mount Zener diode manufactured by Microchip Technology, housed in the DO-213AA package. It belongs to the 1N4678UR-1 through 1N4717UR-1 series of 0.5-watt glass Zener voltage regulators. The device provides a nominal Zener voltage of 6.8V with a standard tolerance of ±5%. It features an internal metallurgical bond where metal slugs sandwich the die for high reliability and low thermal resistance. The component operates within a temperature range of -65°C to +175°C and utilizes a test current of 50 µA.

Feature Summary

• Surface mount equivalent of JEDEC registered 1N4678 through 1N4717 series
• Internal metallurgical bond construction for high reliability
• Low thermal resistance design via metal slug bonding

Applications

• Voltage regulation in compact electronic circuits
• Overvoltage protection for sensitive components
• Reference voltage generation in power supplies

Procurement Notes

Verify the specific datasheet version for the 1N4704UR-1 to confirm exact electrical parameters such as impedance and leakage current, as these values vary across the series. Ensure the ordering suffix matches the required packaging configuration. Cross-reference with the manufacturer's official documentation to validate compliance with MIL-PRF-19500 screening if high-reliability standards are required for the application.

Selection Notes

Select this component when a 0.5W surface mount Zener diode with a 6.8V breakdown voltage is required. The DO-213AA package offers a compact footprint suitable for space-constrained designs. Consider the ±5% tolerance and 50 µA test current characteristics to ensure compatibility with the circuit's biasing requirements. Verify that the operating temperature range meets the environmental conditions of the final assembly.

Part Context

This part is part of Microchip's (formerly Microsemi) extensive portfolio of Zener diodes designed for robust performance. The 1N4704UR-1 serves as the surface mount counterpart to the through-hole 1N4704, maintaining similar electrical characteristics while adapting to modern PCB assembly techniques. It is widely used in industrial and commercial applications requiring reliable voltage clamping.

Replacement Considerations

Direct replacements include other manufacturers' DO-213AA packaged Zener diodes with a 6.8V nominal voltage and 0.5W power rating. Ensure the replacement device maintains the same tolerance class and maximum operating temperature specifications to guarantee circuit functionality without modification.