1N4756AUR

Overview

The Microchip Technology 1N4756AUR is a surface-mount Zener diode housed in the DO-213AB (MELF) glass package. It provides a nominal Zener voltage of 47 V with a tolerance of ±5% and a maximum power dissipation of 1 W. The device operates within a temperature range of -65°C to +175°C, featuring a maximum reverse leakage current of 5 µA at 35.8 V and a forward voltage of 1.2 V at 200 mA.

Feature Summary

• Hermetically sealed glass MELF construction for environmental stability
• Extended operating temperature range suitable for harsh conditions
• Surface mount design compatible with automated assembly processes

Applications

• Voltage regulation in industrial control systems
• Overvoltage protection circuits
• Reference voltage generation in precision instrumentation

Procurement Notes

Verify the specific suffix UR/TR against official Microchip documentation to confirm tape-and-reel packaging specifications. Ensure the DO-213AB footprint matches your PCB layout requirements. Confirm RoHS compliance status directly with the manufacturer as regulatory data may vary by production batch.

Selection Notes

Select this component when a 47 V reference is required in a compact surface-mount form factor. The high-temperature rating allows operation in environments exceeding standard commercial limits. Compare impedance characteristics against circuit requirements to ensure adequate regulation performance under load variations.

Part Context

This part belongs to the 1N47xx series of Zener diodes manufactured by Microchip Technology. The series offers various voltage ratings in both through-hole and surface-mount packages. The UR designation typically indicates a specific reel configuration for automated manufacturing.

Replacement Considerations

Consult Microchip's official substitution guide for verified equivalents. Generic replacements must match the 47 V nominal voltage, 1 W power rating, and DO-213AB package dimensions to ensure mechanical and electrical compatibility.