1N4995US/TR

Single Zener Diodes Overview

The Microchip Technology 1N4995US/TR is a surface mount Zener voltage regulator with a nominal breakdown voltage of 360V. It operates at a test current of 3mA and supports a maximum continuous current of 13.0mA. The device dissipates up to 5 Watts at an ambient temperature of 140°C, derating linearly to zero at 175°C. It features a dynamic impedance of 1400 ohms at the test current and 2300 ohms at 1mA. The unit withstands a surge current of 274A for 8.3 milliseconds and exhibits a maximum reverse leakage current of 2μA at 35V.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless glass construction with internal metallurgical bonds
• Military qualification per MIL-PRF-19500/356 for high-reliability applications
• Inherently radiation hard and non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• High-reliability aerospace systems
• Defense electronics requiring failure-intolerant components
• Harsh environment power regulation circuits

Single Zener Diodes Procurement Notes

Verify the specific revision level and manufacturing date code against the latest Microsemi datasheet before finalizing procurement. Confirm that the tape and reel packaging aligns with EIA-481-B standards for your automated assembly equipment. Ensure thermal management designs account for the specified junction-to-end cap thermal resistance values under actual operating conditions.

Single Zener Diodes Selection Notes

Select this component when a robust, hermetically sealed surface mount Zener diode is required for extreme temperature environments ranging from -65°C to +175°C. The 5-watt power rating allows for significant current handling in compact packages. Verify that the 360V breakdown voltage matches the circuit requirements and that the package dimensions fit the available PCB real estate.

Single Zener Diodes Part Context

This part belongs to the 1N4954US through 1N4996US series of 5-watt glass Zener regulators manufactured by Microchip's Scottsdale Division. These devices are designed as direct replacements for traditional axial-leaded equivalents but offer surface mount convenience. The series provides extensive voltage selections with standard 5% tolerances.

Single Zener Diodes Replacement Considerations

Direct axial-leaded equivalents exist within the same family (e.g., 1N4995 without the US suffix). Cross-reference with other manufacturers' military-grade 5W SMT Zener diodes only if they explicitly meet MIL-PRF-19500/356 specifications and physical footprint constraints.

Single Zener Diodes FAQ

What is the thermal resistance of the 1N4995US/TR?

The thermal resistance from junction to end cap is 7°C/W.

Is the 1N4995US/TR sensitive to electrostatic discharge?

No, the device is non-sensitive to ESD per MIL-STD-750 Method 1020.