1N4703/TR

Overview

The Microchip Technology 1N4703/TR is a single silicon planar Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 16 V with a standard tolerance of ±5%. The device operates in the DO-204AA-2 (DO-35) axial through-hole package, supporting a maximum power dissipation of 500 mW. Key electrical characteristics include a maximum reverse leakage current of 50 nA and a test current of 25 mA. The component is rated for an operating temperature range from -65°C to +175°C.

Feature Summary

• Utilizes silicon planar technology for stable voltage regulation
• Provides standard ±5% Zener voltage tolerance
• Supports high-temperature operation up to +175°C

Applications

• Voltage reference circuits
• Overvoltage protection stages
• General-purpose voltage regulation

Procurement Notes

Verify the manufacturer designation as Microchip Technology when sourcing this specific part number. Confirm the suffix /TR indicates reel packaging. Ensure the DO-204AA-2 package style matches the target PCB footprint. Cross-reference the 16 V Zener voltage and 500 mW power rating against circuit requirements to ensure compatibility with existing system designs.

Selection Notes

Select this component for applications requiring a 16 V reference point with moderate precision. The 500 mW power rating allows for simple thermal management without heat sinks in most low-current scenarios. The wide temperature range makes it suitable for industrial environments. Verify that the axial lead configuration fits the assembly process constraints.

Part Context

This part belongs to the standard 1N47xx series of Zener diodes, widely used for basic voltage clamping and reference functions. The 1N4703 variant specifically targets the 16 V segment of this family. As a through-hole component, it is commonly found in legacy designs and robust industrial control systems where axial leads provide mechanical stability.

Replacement Considerations

Equivalent parts include the 1N4703 from Central Semiconductor Corp. Other manufacturers producing the 1N4703 specification may serve as functional substitutes if pinout and electrical parameters align.