1N5519D/TR

Overview

The Microchip Technology 1N5519D/TR is a single Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 3.6 V with a tight tolerance of ±1%. The device operates in the through-hole DO-204AH (DO-35) axial package and supports a maximum power dissipation of 500 mW. Key electrical characteristics include a Zener impedance of 24 Ohms, a maximum reverse leakage current of 3 µA at 1 V, and a forward voltage of 1.1 V at 200 mA. It functions within an extended junction temperature range from -65°C to +175°C.

Feature Summary

• Provides precise voltage regulation with a tight ±1% tolerance on the 3.6 V Zener voltage.
• Engineered for high-temperature reliability with an operational junction temperature range extending up to +175°C.
• Utilizes a standard DO-204AH (DO-35) axial leaded package suitable for through-hole mounting.

Applications

• Precision voltage reference circuits requiring stable low-voltage regulation
• Overvoltage protection stages in sensitive electronic systems
• Clamping applications in signal processing paths

Procurement Notes

Verify the specific suffix designation when ordering, as it indicates the tape-and-reel packaging format rather than bulk supply. Confirm that the ±1% tolerance variant aligns with circuit requirements, as other variants like the 'B' suffix offer different tolerances. Ensure the DO-204AH footprint matches the target PCB layout. Cross-reference the manufacturer datasheet for the latest RoHS compliance status and environmental declarations before finalizing procurement specifications.

Selection Notes

Select this component when strict voltage accuracy is critical, given its ±1% tolerance compared to standard 5% or 10% options. The wide operating temperature range makes it suitable for harsh environments where standard silicon devices might fail. Consider the 500 mW power rating to ensure adequate thermal headroom under continuous operation. Verify that the 24 Ohm Zener impedance meets the dynamic regulation needs of the specific application design.

Part Context

This part belongs to the 1N5518B-1N5546B series of Zener diodes manufactured by Microchip Technology. The series covers a range of voltage ratings from 3.3 V to higher values, all sharing similar physical dimensions and power handling capabilities. The 'D' suffix specifically denotes the tighter manufacturing tolerance class, distinguishing it from the standard 'B' tolerance parts within the same product family.

Replacement Considerations

The 1N5519D is listed as a parameter-equivalent alternative. Other variants such as JAN1N6313D are noted as substitutes but may differ in military-grade specifications or packaging formats.