1N4927

Overview

The Microchip Technology 1N4927 is a temperature-compensated Zener diode designed for precision voltage regulation applications. It features a nominal Zener voltage of 19.2 V with a tolerance of ±5%. The device is rated for a power dissipation of 500 mW and operates within a temperature range of -65°C to +175°C. Packaged in the DO-35 axial leaded format, it utilizes a test current of 7.5 mA and exhibits a low voltage temperature coefficient of 0.001%/°C, ensuring stable reference performance across varying thermal conditions.

Feature Summary

• Temperature compensated design for stable voltage reference
• Low noise operation suitable for precision circuits
• Wide operating temperature range from -65°C to +175°C

Applications

• Precision voltage reference circuits
• Temperature compensated voltage regulation
• Low noise analog signal conditioning

Procurement Notes

Verify the specific suffix (e.g., /TR) against the required reel or bulk packaging configuration. Confirm RoHS compliance status as indicated in official documentation. Ensure the DO-35 package dimensions match the target PCB footprint. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and supply chain integrity before procurement.

Selection Notes

Select this component when a stable 19.2 V reference is required under varying thermal conditions. The low temperature coefficient makes it superior to standard Zener diodes for precision applications. Verify that the 500 mW power rating accommodates the maximum expected current in the circuit design. Consider the axial DO-35 package constraints for automated assembly processes.

Part Context

This component belongs to Microchip's legacy temperature-compensated Zener diode series, originally established by National Semiconductor and later acquired. These devices are engineered to provide highly stable reference voltages by combining a Zener junction with a forward-biased diode to cancel out temperature coefficients. The 1N4927 specifically targets the 19.2 V range, offering a balance of stability and availability for industrial and military-grade electronics.

Replacement Considerations

Public confirmed substitute part numbers include the 1N4927/TR for tape-and-reel packaging variants.