1N4919/TR

Overview

The 1N4919/TR is a single Zener diode manufactured by Microchip Technology, designed for through-hole mounting in DO-204AH (DO-35) axial packages. It features a nominal Zener voltage of 19.2 V with a tolerance of ±5%. The device supports a power dissipation of 500 mW and operates within a temperature range of -65 °C to +175 °C. This component serves as a temperature-compensated reference element suitable for precision voltage regulation applications requiring stable performance across wide thermal variations.

Feature Summary

• Temperature-compensated Zener design for stable voltage reference
• Through-hole axial construction for reliable PCB integration
• High operating temperature capability up to 175 °C

Applications

• Precision voltage reference circuits
• Temperature-compensated regulator designs
• Overvoltage protection in sensitive electronics

Procurement Notes

Verify the specific suffix /TR indicates tape-and-reel packaging configuration when ordering. Confirm RoHS compliance status and lead times directly with authorized distributors or Microchip Technology sales representatives prior to procurement. Ensure the DO-204AH package dimensions match your board layout requirements.

Selection Notes

Select this component when a stable 19.2 V reference with temperature compensation is required. The 500 mW power rating suits low-current regulation tasks. Verify that the ±5% voltage tolerance meets circuit accuracy needs. Consider the axial package form factor for manual assembly or high-reliability through-hole implementations.

Part Context

This part belongs to Microchip's general-purpose Zener diode lineup, specifically engineered for applications demanding voltage stability over temperature. The 1N4919 variant is distinct from standard Zener diodes due to its compensated characteristics, making it suitable for instrumentation and control systems where drift must be minimized.

Replacement Considerations

Check for direct cross-reference equivalents such as 1N4919 without the /TR suffix if reel packaging is not mandatory. Verify that substitute components maintain the same 19.2 V nominal voltage, 500 mW power rating, and DO-204AH package footprint to ensure mechanical and electrical compatibility.