1N4759UR-1/TR

Overview

The Microchip Technology 1N4759UR-1/TR is a surface mountable 1.0 W glass Zener diode in the DO-213AB MELF package. It provides a nominal Zener voltage of 62 V with a standard tolerance of +/- 5%. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 5 µA at 5 V test voltage. Electrical characteristics include a dynamic impedance of 125 Ohms at a test current of 4.0 mA, a regulator current of 14 mA, and a maximum surge current of 2000 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
• Regulates voltage over a broad operating current and temperature range

Applications

• Voltage regulation in high density circuit designs
• High reliability electronic systems requiring hermetic sealing
• Radiation-hardened circuit protection

Procurement Notes

Verify the specific suffix requirements against the manufacturer's datasheet to ensure correct tolerance and packaging options. Confirm RoHS compliance status if required by the application specifications. Check for availability of screening prefixes such as MQ or MX for military-grade variants. Ensure the ordering quantity aligns with tape and reel packaging standards specified in the documentation.

Selection Notes

Select this component when a 1.0 W power dissipation rating and DO-213AB surface mount footprint are required. Consider the 62 V nominal voltage and 5% tolerance for precise regulation needs. Evaluate thermal derating curves for ambient temperature conditions exceeding 45°C. Compare against axial equivalents like the 1N4759A if through-hole mounting becomes necessary.

Part Context

This part belongs to the 1N4728UR thru 1N4764AUR series of surface mount glass Zener diodes manufactured by Microchip Technology (formerly Microsemi). The series offers Zener voltages ranging from 3.3 V to 100 V. These devices are electrically equivalent to the JEDEC registered 1N4728A thru 1N4764A registration but utilize the DO-213AB outline instead of the DO-41 package.

Replacement Considerations

The 1N4759A is the direct axial leaded equivalent. Surface mount alternatives include the SMAJ4759A series. Verify pinout polarity and thermal resistance characteristics when substituting with different package types.