1N4704

Overview

The Microchip Technology 1N4704 is a single silicon unidirectional Zener voltage regulator diode designed for general-purpose voltage regulation applications. It operates within the DO-204AH (DO-35) axial leaded package, providing a nominal Zener voltage of 17V at a specified test current. The device features a maximum power dissipation rating of 0.5W and is constructed using hermetically sealed glass double-slug technology to ensure reliability. It supports an operating temperature range from -65°C to 200°C, making it suitable for various industrial and commercial environments requiring stable voltage reference or protection.

Feature Summary

• Hermetically sealed glass construction utilizing double-slug type metallurgically bonded design for enhanced durability
• Axial leaded DO-204AH package configuration offering a compact form factor compared to conventional DO-204AA styles
• Corrosion-resistant external surfaces with readily solderable leads for reliable circuit integration

Applications

• General-purpose voltage regulation in electronic circuits
• Voltage reference sources for analog and digital systems
• Overvoltage protection stages in signal paths

Procurement Notes

Verify the specific manufacturer source, as the 1N4704 designation is utilized by multiple semiconductor producers including Motorola/NXP, Microchip, and others. Confirm that the received component matches the required electrical specifications and package dimensions. Ensure the part number suffix aligns with the desired packaging format. Cross-reference datasheets from the specific supplier to validate performance characteristics before final procurement decisions.

Selection Notes

Select this component when a standard 17V Zener voltage with 0.5W power handling is required in an axial glass package. Consider the thermal management capabilities provided by the DO-204AH form factor. Evaluate the operating temperature range requirements against the specified -65°C to 200°C limits. Verify compatibility with existing PCB footprints designed for DO-35 style components during the design phase.

Part Context

This component belongs to the broader family of 500mW glass Zener diodes, which typically span a wide voltage range from 1.8V to 200V. The 1N4704 specifically addresses the 17V segment of this spectrum. Similar parts in this category share common mechanical traits such as hermetic sealing and axial leads, but differ in breakdown voltage ratings. This specific part number represents a standardized industry designation for this voltage level.

Replacement Considerations

Direct substitutes include other manufacturers' versions of the 1N4704, such as those produced by NXP or Knox Semiconductor. Ensure replacement parts maintain the same 17V Zener voltage and 0.5W power dissipation ratings. Verify that alternative packages match the DO-204AH footprint requirements for seamless integration.