1N4918

Overview

The Microchip Technology 1N4918 is a temperature-compensated Zener reference diode with a nominal voltage of 19.2 V and a tolerance of ±5%. It features a maximum DC power dissipation of 500 mW at +50°C, with a derating factor of 4 mW/°C above this threshold. The device operates within a junction temperature range of -65°C to +175°C and utilizes a DO-35 axial through-hole package.

Feature Summary

• Temperature compensated design for stable reference performance
• Low noise characteristics suitable for precision applications
• Metallurgically bonded construction with double plug technology

Applications

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

Procurement Notes

Verify the specific suffix or variant against official datasheets to ensure compatibility with required tolerance and packaging specifications. Confirm RoHS compliance status as indicated in current product documentation. Cross-reference manufacturer part numbers with authorized distributor catalogs to validate authenticity and sourcing channels before procurement.

Selection Notes

Select this component when a stable 19.2 V reference with low noise is required. Ensure thermal management accounts for the 500 mW dissipation limit and derating requirements above +50°C. Verify that the DO-35 through-hole package fits the target PCB layout constraints and operating temperature range of -65°C to +175°C.

Part Context

This component belongs to the 1N4916 through 1N4932A series of temperature-compensated Zener reference diodes manufactured by Microchip Technology. These devices are designed for applications requiring high stability and low noise over a wide temperature range, utilizing specialized metallurgical bonding techniques.

Replacement Considerations

Consult official substitution guides for compatible equivalents within the same series or from other manufacturers ensuring matching voltage, tolerance, and package dimensions.