1N2978RB

Overview

The Microchip Technology 1N2978RB is a hermetically sealed Zener diode designed for high-reliability applications. It features a 14V nominal Zener voltage with a ±5% tolerance and a 10W power dissipation rating. The component utilizes an internal solder bond construction within a DO-213AA (DO-4) stud mount package. It operates across a temperature range of 0°C to 175°C, providing robust voltage regulation in harsh environments.

Feature Summary

• Hermetically sealed welded construction for environmental protection
• Internal solder bond construction for mechanical stability
• Stud mount configuration for efficient thermal management

Applications

• High-reliability voltage reference circuits
• Military and aerospace power systems
• Industrial equipment requiring wide temperature operation

Procurement Notes

Verify the specific suffix RB indicates the correct polarity and tolerance variant. Confirm RoHS non-compliant status if lead-free compliance is required. Ensure the DO-213AA package dimensions match the chassis mounting requirements. Validate the 14V Zener voltage specification against circuit design needs.

Selection Notes

Select this component when hermetic sealing and stud mounting are mandatory. The 10W power rating supports high-current regulation tasks. The 0°C to 175°C operational range suits extreme environment deployments. Verify that the ±5% tolerance meets the precision requirements of the voltage reference application.

Part Context

This device belongs to the 1N2978 series of general-purpose Zener diodes manufactured by Microchip Technology. The series includes various voltage ratings from 3.9V to 200V. These components are engineered for durability and consistent performance in critical electronic systems where standard surface-mount devices are unsuitable.

Replacement Considerations

The 1N2978B is a related part number within the same series. Verify if the 'B' suffix denotes a different tolerance or polarity compared to the 'RB' variant before substitution.