1N4961US

Overview

The Microchip Technology 1N4961US is a surface mount Zener voltage regulator with a nominal breakdown voltage of 13 V and a maximum power dissipation of 5 W. It features a standard voltage tolerance of ±5% and operates within a temperature range of -65°C to +175°C. The device utilizes a voidless hermetically sealed glass package (E or D-5B) with copper end caps finished in Tin/Lead. Electrical characteristics include a maximum reverse leakage current of 10 µA at 9.9 V, a dynamic impedance of 3 Ohms at the test current of 100 mA, and a forward voltage of 1.5 V at 1 A.

Feature Summary

• Voidless hermetically sealed glass construction with internal metallurgical bonds for high reliability
• Military qualification per MIL-PRF-19500/356 suitable for critical applications
• Robust design inherently resistant to electrostatic discharge
• Radiation hard performance characteristics

Applications

• High-reliability aerospace systems
• Defense electronics requiring military qualification
• Industrial equipment where failure is not tolerated
• Voltage regulation in extreme temperature environments

Procurement Notes

Verify that the specific procurement order matches the required military qualification standards and package type. Confirm compliance with material restrictions such as RoHS status if applicable to the project requirements. Ensure the supplier provides documentation verifying the hermetic seal integrity and metallurgical bond quality consistent with the manufacturer's specifications.

Selection Notes

Select this component when a 5 W surface mount Zener diode with military-grade reliability is required. The 13 V nominal rating and ±5% tolerance define the operating point. Consider the D-5B package dimensions for PCB layout constraints. Evaluate thermal management needs given the 5 W dissipation capability and the specified derating curve above 140°C ambient temperature.

Part Context

This part belongs to the 1N4954US through 1N4996US series of surface mount Zener regulators. These components are designed for applications demanding robustness and long-term stability. The series offers various voltage options from 3.3 V to 390 V while maintaining consistent mechanical and electrical performance profiles across the lineup.

Replacement Considerations

JAN1N4961C

FAQ

What is the maximum continuous current rating for the 1N4961US?

The maximum continuous regulator current (IZM) is 365 mA.

How is polarity indicated on the 1N4961US package?

Polarity is indicated by a band on the device marking the cathode side.