1N4754UR-1/TR

Overview

The Microchip Technology 1N4754UR-1/TR is a surface mountable glass Zener diode with a nominal voltage of 39V and a power dissipation rating of 1.0W at 25°C. It utilizes the DO-213AB MELF package, offering hermetic sealing for high reliability applications. The device features a maximum dynamic impedance of 60 Ohms at a test current of 6.5mA and a maximum reverse current of 5µA at 5V. It operates within a temperature range of -65°C to +175°C.

Feature Summary

• Hermetically sealed glass MELF package suitable for high reliability environments
• Surface mount design ideal for high density mounting with low parasitic requirements
• Inherently radiation hard per MicroNote 050
• Regulates voltage over a broad operating current and temperature range

Applications

• Voltage regulation in high density electronic circuits
• High reliability applications requiring source control drawings
• Radiation-hardened circuit designs

Procurement Notes

Verify the specific suffix configuration against the manufacturer's datasheet to ensure correct tolerance and screening levels. Confirm RoHS compliance status if required by project specifications. Check availability as this component may be subject to restricted supply conditions or long lead times depending on the manufacturing batch and distribution channel.

Selection Notes

Select this component when a 1W surface mount Zener diode with hermetic sealing is required. Ensure the 39V nominal voltage aligns with the circuit regulation needs. Consider the DO-213AB footprint compatibility during PCB layout. Verify thermal derating requirements based on the specific ambient temperature and mounting conditions on the FR4 PC board.

Part Context

This part belongs to the 1N4728UR thru 1N4764AUR series of surface mount 1.0W glass Zener diodes. It is electrically equivalent to the JEDEC registered 1N4728A thru 1N4764A series but packaged in the DO-213AB outline. The 'TR' suffix indicates tape and reel packaging, while the 'UR' designation typically denotes the standard commercial version within this product line.

Replacement Considerations

Direct equivalents include other manufacturers' DO-213AB 1W Zener diodes with matching 39V specifications. Surface mount alternatives like the SMAJ series are available but differ in package size and power handling. Verify pinout polarity and thermal characteristics before substitution.