1N4918A/TR

Overview

The Microchip Technology 1N4918A/TR is a temperature-compensated Zener reference diode designed for precision voltage regulation. It features a nominal Zener voltage of 19.2 V with a tolerance of ±5%. The device operates in the DO-35 axial through-hole package and supports a DC power dissipation of 500 mW at +50°C, with derating of 4 mW/°C above this threshold. It exhibits low noise characteristics and utilizes metallurgically bonded double plug construction. The component maintains functionality across an operating temperature range from -65°C to +175°C.

Feature Summary

• Temperature compensated design ensures stable voltage reference performance across varying thermal conditions.
• Low noise operation suitable for sensitive analog signal processing applications.
• Metallurgically bonded double plug construction provides robust mechanical integrity and reliability.

Applications

• Precision voltage reference circuits requiring thermal stability
• Low noise analog signal conditioning systems
• Industrial control equipment operating in extreme temperatures

Procurement Notes

Verify the specific suffix designation against official Microchip documentation to confirm packaging configuration. Ensure the procurement channel sources genuine components to guarantee compliance with specified electrical parameters and temperature ratings. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and technical specifications prior to acquisition.

Selection Notes

Select this component when a stable 19.2 V reference is required under fluctuating thermal environments. The wide operating temperature range makes it suitable for harsh industrial settings. Consider the through-hole DO-35 package constraints during PCB layout. Evaluate the 500 mW power dissipation limit relative to expected circuit currents to ensure safe operation within derating guidelines.

Part Context

This component belongs to the 1N4916 through 1N4932A series of temperature-compensated Zener reference diodes manufactured by Microchip Technology. These devices are engineered to provide consistent voltage regulation despite ambient temperature changes. The series shares common construction techniques including metallurgical bonding and double plug structures to enhance durability and electrical consistency across the product line.

Replacement Considerations

Consult official Microchip substitution guides for verified equivalents. Generic replacements may not match the specific temperature compensation coefficients or low-noise characteristics required for precision reference applications.