1N3049BUR-1

Overview

The Microchip Technology 1N3049BUR-1 is a surface mount glass Zener diode in the DO-213AB outline, rated for 1.5 watts power dissipation at 25°C. It provides a nominal Zener voltage of 160 V with a test current of 1.6 mA and maximum impedance of 1100 Ohms. The device operates from -65°C to +175°C, features hermetically sealed double-slug glass construction, and offers low reverse leakage current of 0.5 µA.

Feature Summary

• Hermetically sealed double-slug glass construction for high-reliability applications
• Leadless surface mount package suitable for high-density mounting
• Metallurgically enhanced internal contact design for lower thermal resistance
• Inherently radiation hard

Applications

• High-density circuit board mounting
• Voltage regulation over broad operating currents
• High-reliability electronic systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm screening levels or RoHS compliance status. Confirm that the required voltage tolerance aligns with the standard JEDEC registration specifications provided in the datasheet electrical characteristics table.

Selection Notes

Select this component when a surface mount solution is required for voltages near 160 V. Ensure the PCB footprint matches the DO-213AB dimensions. Consider the thermal derating curve if ambient temperatures exceed 25°C or if steady-state power limits must be strictly observed on FR4 substrates.

Part Context

This part belongs to the 1N3016BUR-1 through 1N3051BUR-1 series of surface mountable Zener diodes. These devices serve as equivalents to the axial lead 1N3016 through 1N3051 JEDEC registrations but utilize the DO-213AB outline for improved mounting density and parasitic performance.

Replacement Considerations

Equivalent axial lead parts include the 1N3049B. Other series members within the 1N3016BUR-1 to 1N3051BUR-1 range may substitute if voltage ratings differ.