1N4747AUR/TR

Overview

The Microchip Technology 1N4747AUR/TR is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 20 V with a tolerance of 5%. The device operates in the SMD/SMT package DO-213AB (SOD-80) and dissipates up to 1 W of power. Key electrical characteristics include a maximum reverse leakage current of 100 nA, a Zener impedance of 22 Ohms, and a test current of 12.5 mA. It supports an operating temperature range from -65 °C to +175 °C.

Feature Summary

• Provides stable voltage regulation at a nominal 20 V level with tight manufacturing tolerances.
• Engineered for surface-mount integration using the compact DO-213AB glass MELF package.
• Capable of handling high thermal loads with a 1 W power dissipation rating.
• Maintains reliable operation across extreme environmental temperatures ranging from -65 °C to +175 °C.

Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in sensitive electronic systems
• Power supply regulation modules

Procurement Notes

Verify the specific suffix configuration against official Microchip documentation to ensure correct packaging and material specifications. Confirm RoHS compliance status as indicated in the datasheet, noting that some variants may not meet standard restrictions. Cross-reference the part number with authorized distributors to validate authenticity and traceability before finalizing procurement orders.

Selection Notes

Select this component when a robust 20 V regulation point is required in space-constrained designs. The DO-213AB package offers a balance between thermal performance and footprint efficiency. Ensure the circuit design accounts for the 1 W power dissipation limit and the specific Zener impedance characteristics under expected load conditions.

Part Context

This device belongs to the industry-standard 1N4747 series of Zener diodes, widely recognized for their reliability in discrete semiconductor applications. Manufactured by Microchip Technology, it utilizes silicon junction technology housed in a hermetically sealed glass envelope, ensuring long-term stability and resistance to environmental stressors common in industrial electronics.

Replacement Considerations

Direct replacements include the non-trimmed variant 1N4747AUR or other manufacturers' equivalents meeting the 20 V, 1 W, DO-213AB specification. Verify pinout compatibility and thermal resistance parameters when substituting with parts from different suppliers to maintain circuit integrity.