1N4930

Overview

The Microchip Technology 1N4930 is a single Zener diode designed for precision voltage reference applications. It features a nominal Zener voltage of 19.2 V with a tolerance of ±5%. The device is rated for 500 mW power dissipation and utilizes a DO-204AH (DO-35) through-hole package. Key electrical characteristics include a maximum reverse leakage current of 15 µA and a temperature coefficient of 0.005%/°C. It operates within a junction temperature range of -55°C to +100°C, ensuring stable performance in temperature-compensated circuits.

Feature Summary

• Temperature compensated design for low noise voltage reference stability
• Precision Zener voltage specification with tight tolerance
• Through-hole construction suitable for standard PCB mounting

Applications

• Voltage reference circuits requiring temperature compensation
• Low noise analog signal conditioning
• Precision measurement instrumentation

Procurement Notes

Verify the specific manufacturer source, as the 1N4930 part number appears across multiple vendors including Microchip, Microsemi, and Digitron. Confirm that the received component matches the required DO-204AH package and 19.2V specification. Ensure datasheet alignment for leakage current and temperature coefficients before integration into sensitive designs.

Selection Notes

Select this component when a stable, temperature-compensated Zener reference near 19V is required. The DO-35 package limits current handling compared to larger packages. Verify that the 500mW power rating suffices for the expected thermal environment. Consider leakage current specifications if operating at elevated temperatures or high impedance nodes.

Part Context

This component belongs to the family of low-noise, temperature-compensated Zener diodes. These devices are engineered to minimize voltage drift over temperature changes, making them superior to standard Zener diodes for reference applications. The 1N4930 specifically targets the 19.2V range, filling a niche for mid-range voltage references in analog systems.

Replacement Considerations

Cross-reference with other manufacturers' 1N4930 equivalents such as those from Digitron or Compensated Devices Inc. Ensure substitute parts maintain the same 19.2V nominal voltage, ±5% tolerance, and DO-35 package dimensions to guarantee mechanical and electrical compatibility.