1N3049BUR-1/TR

Overview

The Microchip Technology 1N3049BUR-1/TR is a surface mount glass Zener diode with a nominal voltage of 160 V and a test current of 1.6 mA. It features a maximum reverse leakage current of 0.5 µA at 160 V and a maximum Zener impedance of 1100 Ohms at the test current. The device operates within a temperature range of -65°C to +175°C and dissipates up to 1.5 watts. It utilizes a DO-213AB (MELF) package and is supplied in tape and reel format.

Feature Summary

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

Applications

• High-reliability applications requiring hermetic sealing
• High-density circuit board mounting
• Voltage regulation over broad operating currents and temperatures
• Low parasitic requirement circuits

Procurement Notes

Verify the specific electrical parameters against the official datasheet before integration, as values may vary by tolerance suffix. Confirm that the TR suffix correctly indicates tape and reel packaging for your assembly line requirements. Ensure compatibility with the specified soldering temperatures and thermal derating curves during the design phase.

Selection Notes

Select this component when a leadless surface mount Zener diode with high power dissipation is required. The 160 V rating suits higher voltage regulation needs compared to lower-voltage equivalents in the series. Consider the tight voltage tolerances and low leakage characteristics for precision applications. Verify that the DO-213AB footprint matches the PCB layout constraints.

Part Context

This part belongs to the 1N3016BUR-1 through 1N3051BUR-1 series of surface mountable glass Zener diodes manufactured by Microchip Technology. These devices are designed as surface mount equivalents to JEDEC registered axial lead packages but offer a higher power rating. The series provides a wide selection of voltages from 6.8 to 200 volts in a compact MELF form factor.

Replacement Considerations

Equivalent screening options are available by adding MQ, MX, MV, or MSP prefixes to the part number for JAN, JANTX, JANTXV, or JANS qualifications respectively.