1N5519B/TR

Overview

The Microchip Technology 1N5519B/TR is a low voltage avalanche Zener diode with a nominal breakdown voltage of 3.6 V at a test current of 20 mA. It features a maximum dynamic impedance of 24 Ohms and a maximum reverse leakage current of 3 µA at 1 V. The device dissipates up to 500 mW and operates within a temperature range of -65 °C to +175 °C. Packaged in an axial-lead DO-35 (DO-204AH) glass enclosure, the TR suffix indicates tape and reel packaging.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features minimal capacitance for high-frequency applications
• Inherently radiation hard per Microsemi MicroNote 050
• Non-sensitive to electrostatic discharge

Applications

• Voltage regulation circuits requiring stable reference voltages
• Protection against overvoltage transients
• Clamping circuits in sensitive electronic systems

Procurement Notes

Verify that the specific ordering suffix matches the required tolerance and package configuration. Confirm whether the procurement requires standard bond or metallurgical bond construction. Ensure the supplier provides documentation confirming compliance with MIL-PRF-19500/437 if military qualification levels are necessary for the application.

Selection Notes

Select this component when a precise 3.6 V reference is needed with tight voltage tolerances. The B suffix guarantees a 5% tolerance, which is tighter than the standard JEDEC specification. Consider the thermal resistance values when designing heat dissipation strategies for enclosed environments.

Part Context

This part belongs to the 1N5518 through 1N5546 series of 0.5 W axial-leaded glass Zener Voltage Regulators. The series offers a wide selection of voltages from 3.3 V to 33 V. The 1N5519B variant specifically targets the lower end of this voltage range with strict manufacturing tolerances.

Replacement Considerations

Equivalent parts include JAN1N5519B, JANTX1N5519B, and JANTXV1N5519B. These variants share identical electrical characteristics but differ in reliability levels and qualification standards.