1N4916A/TR

Overview

The Microchip Technology 1N4916A/TR is a temperature-compensated single Zener 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 (DO-204AH) through-hole package and dissipates up to 500 mW. Key electrical parameters include a maximum reverse leakage current of 15 µA, a Zener impedance of 25 Ohms at a test current of 7.5 mA, and a voltage temperature coefficient of 0.01 %/°C. It supports an operating temperature range from -65 °C to +175 °C.

Feature Summary

• Temperature compensated design ensures stable voltage regulation across wide thermal variations
• High reliability construction suitable for demanding industrial environments
• Precision voltage reference capability with tight tolerance specifications

Applications

• Precision voltage reference circuits requiring thermal stability
• Overvoltage protection in sensitive electronic systems
• Industrial control equipment operating under extreme temperature conditions

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm RoHS compliance status as indicated in product documentation. Ensure ordering suffix matches required packaging configuration. Validate date codes and lot numbers for traceability requirements. Cross-reference part number with authorized distributor lists to avoid counterfeit sources.

Selection Notes

Select this component when precise voltage regulation is required over extended temperature ranges. The low temperature coefficient makes it suitable for applications where standard Zener diodes would exhibit unacceptable drift. Consider the DO-35 package constraints for PCB layout and thermal management. Verify that the 500 mW power dissipation rating meets circuit requirements under worst-case operating conditions.

Part Context

This component belongs to Microchip's temperature-compensated Zener diode family, engineered for high-stability applications. Unlike standard Zener diodes, these devices incorporate internal compensation mechanisms to minimize voltage drift with temperature changes. The 1N4916A variant specifically targets the 19.2 V regulation point, offering superior performance compared to generic alternatives in precision analog circuits.

Replacement Considerations

Public confirmed substitute part numbers are not available in verified documentation.