1N4758UR-1/TR

Overview

The Microchip Technology 1N4758UR-1/TR is a surface mount glass Zener diode with a nominal voltage of 56 V and a power dissipation rating of 1.0 W at 25°C. It utilizes the DO-213AB (MELF) package, offering hermetic sealing for high reliability applications. The device features a standard voltage tolerance of ±5% and operates within a temperature range of -65°C to +175°C. Electrical characteristics include a maximum reverse current of 5 µA at 42.6 V and a dynamic impedance of 110 Ohms at the test current of 4.5 mA.

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 specifications
• Broad operating current and temperature range for stable voltage regulation

Applications

• Voltage regulation in high-density electronic circuits
• High-reliability systems requiring source control drawings
• Applications necessitating radiation-hardened components

Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm exact electrical tolerances and packaging configurations. Ensure compatibility with the DO-213AB footprint during PCB layout. Confirm RoHS compliance status if required by project specifications, as indicated by the e3 suffix availability.

Selection Notes

Select this component when a surface mount solution is required for 56 V regulation with strict space constraints. The DO-213AB package provides a leadless form factor beneficial for automated assembly. Consider the thermal resistance characteristics and derating curves for steady-state power dissipation calculations under varying ambient temperatures.

Part Context

This part belongs to the 1N4728UR through 1N4764AUR series of surface mountable 1-watt Zener diodes. These devices are electrically equivalent to the JEDEC registered 1N4728A through 1N4764A axial-leaded series but conform to the DO-213AB surface mount outline. The series covers Zener voltages from 3.3 V to 100 V.

Replacement Considerations

The 1N4758A is the direct axial-leaded equivalent. Surface mount alternatives include the SMAJ4758A series. Verify pinout orientation and thermal management requirements when substituting between package types.