1N4756UR-1/TR

Overview

The Microchip Technology 1N4756UR-1/TR is a surface mount glass Zener diode in the DO-213AB (MELF) package. It provides a nominal Zener voltage of 47 V with a standard tolerance of ±5%. The device dissipates up to 1.0 W at 25°C and operates within a temperature range of -65°C to +175°C. Electrical characteristics include a maximum dynamic impedance of 80 Ohms at a test current of 5.5 mA, a maximum reverse leakage current of 5 µA at 35.8 V, and a forward voltage of 1.2 V maximum at 200 mA.

Feature Summary

• Hermetically sealed glass MELF package for high reliability applications
• Surface mount design suitable for high density mounting
• Inherently radiation hard per MicroNote 050
• ESD nonsensitive construction

Applications

• Voltage regulation in high density circuits
• High reliability electronic systems requiring hermetic sealing
• Radiation-hardened environments

Procurement Notes

Verify that the ordering suffix TR indicates tape and reel packaging as specified in the datasheet. Confirm the part number includes the UR designation for the specific surface mount variant. Ensure compatibility with RoHS compliant requirements if applicable to the assembly process. Cross-reference the manufacturer's latest documentation for any potential updates to electrical parameters or mechanical dimensions.

Selection Notes

Select this component when a surface mount Zener diode with a 47 V breakdown voltage is required. The DO-213AB package offers a leadless form factor ideal for space-constrained designs. Consider the ±5% voltage tolerance and 1.0 W power dissipation capabilities against circuit load requirements. Verify thermal management needs given the junction-to-ambient thermal resistance specifications.

Part Context

This device belongs to the 1N4728UR through 1N4764AUR series of surface mountable 1 watt Zener diodes. These components are electrically equivalent to the JEDEC registered 1N4728A through 1N4764A axial-leaded series but utilize the DO-213AB outline. The series covers Zener voltages from 3.3 V to 100 V, providing a wide selection for various regulation needs.

Replacement Considerations

Direct equivalents include the 1N4756A in the DO-41 axial package for through-hole replacements. Surface mount alternatives may include SMAJ4756A variants. Verify pinout polarity and physical footprint compatibility before substitution.