1N4960/TR

Overview

The Microchip Technology 1N4960/TR is a military-qualified, voidless hermetically sealed glass Zener diode rated at 5 Watts. It features an axial lead package and operates within a temperature range of -65°C to +175°C. The nominal Zener voltage is 12 V with a standard tolerance of ±5%. Key electrical parameters include a test current (IZT) of 100 mA, maximum reverse leakage current of 10 µA at 9.1 V, and a maximum Zener impedance of 2.5 Ohms at IZT. The device supports a continuous regulator current of 395 mA and a surge current of 18 A.

Feature Summary

• Military qualified to MIL-PRF-19500/356 for high-reliability applications
• Voidless hermetically sealed glass construction with internal metallurgical bonds
• Inherently radiation hard and non-sensitive to ESD per MIL-STD-750 Method 1020

Applications

• High-reliability aerospace and defense circuits
• Voltage regulation in harsh environments
• Critical systems where failure cannot be tolerated

Procurement Notes

Verify the specific revision level and manufacturing origin against the latest official datasheet before procurement. Confirm that the ordering suffix matches the required tolerance or packaging configuration. Ensure compliance with relevant export control classifications and environmental directives applicable to your region. Cross-reference the part number with authorized distributors to confirm authenticity and traceability.

Selection Notes

Select this component when a robust, high-power Zener regulator is required for extreme temperature conditions. The 5W rating allows for significant power dissipation compared to lower-power alternatives. Consider the axial lead format for through-hole mounting requirements. Evaluate the specific voltage tolerance needs, as tighter tolerances require different suffixes.

Part Context

This part belongs to the 1N4954 through 1N4996 series of 5 Watt Zener Voltage Regulators manufactured by Microsemi (now Microchip Technology). These components are industry-recognized for their durability and are designed for applications demanding high reliability. The series offers a wide selection of voltages from 3.3V to 390V.

Replacement Considerations

Direct replacements must match the 5W power rating, 12V Zener voltage, and axial lead package. Verify that any substitute meets the same military qualification standards if used in critical applications. Surface mount equivalents exist but require different footprint considerations.