1N4960US/TR

Overview

The Microchip Technology 1N4960US/TR is a surface-mount Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 12 V with a tolerance of 5%. The device operates within a power dissipation rating of 1.5 W and maintains a maximum reverse leakage current of 50 nA at 12.8 V. Electrical testing is conducted at a test current of 45 mA, resulting in a Zener impedance of 5 Ohms. The component supports a forward current of 200 mA with a forward voltage of 1 V. It is qualified to MIL-PRF-19500/406 standards and functions reliably across an operating temperature range from -65°C to +175°C.

Feature Summary

• Hermetically sealed voidless glass construction utilizing internal metallurgical bonding for high reliability.
• Military qualification compliant with MIL-PRF-19500/406 specifications.
• Surface mount SQ-MELF package design suitable for automated assembly.

Applications

• High-reliability military electronic systems
• Aviation and aerospace circuitry
• Critical voltage reference circuits

Procurement Notes

Verify the specific suffix US/TR against official Microchip documentation to confirm surface mount packaging and tape-and-reel delivery format. Ensure the procurement specification explicitly requires MIL-PRF-19500/406 military qualification rather than commercial grade equivalents. Confirm that the 1.5 W power rating and 12 V Zener voltage align precisely with the target circuit requirements before finalizing orders.

Selection Notes

Select this component when hermetic sealing and extreme temperature stability are mandatory for the application. The SQ-MELF package offers a compact footprint compared to through-hole alternatives while maintaining robust mechanical integrity. Engineers should consider the 5% voltage tolerance and 5 Ohm impedance characteristics when designing precision regulation networks requiring stable performance under varying thermal conditions.

Part Context

This part belongs to the 1N4960 series of 1.5 W Zener diodes manufactured by Microchip Technology. The series includes various voltage options ranging from 3.3 V to 200 V, all sharing the same hermetically sealed glass construction. The US/TR designation specifically identifies the surface mount variant packaged in reels, distinguishing it from axial leaded versions like the standard 1N4960.

Replacement Considerations

Direct replacements must match the 12 V Zener voltage, 1.5 W power rating, and SQ-MELF package dimensions. Verify that substitute components also meet MIL-PRF-19500/406 military qualification standards if hermetic sealing is required for the specific application environment.