1N2982RB

Overview

The 1N2982RB is a silicon unidirectional Zener diode manufactured by Microchip Technology. It features an 18V nominal Zener voltage with a ±5% tolerance and a 10W power dissipation rating. The device operates within a junction temperature range of -65°C to 175°C and exhibits a maximum dynamic impedance of 4Ω at 13.7V. It utilizes internal solder bond construction and is hermetically sealed in a DO-203AA (DO-4) stud-mount metal package.

Feature Summary

• Hermetically sealed welded construction for environmental reliability
• Internal solder bond connection technology
• High thermal stability supporting extended operating temperatures up to 175°C

Applications

• Voltage regulation circuits requiring high power handling
• Fixed voltage reference applications in harsh environments
• Industrial control systems utilizing stud-mount configurations

Procurement Notes

Verify the specific manufacturer source, as the 1N2982B designation has been produced by multiple vendors including Central Semiconductor. Confirm that the Microchip Technology version matches the required DO-203AA package and hermetic sealing specifications. Ensure compatibility with existing stud-mount hardware and thermal management designs before procurement.

Selection Notes

Select this component when a robust, high-power Zener regulator is needed for chassis or panel mounting. The DO-4 package facilitates direct heat sinking to equipment frames. Consider the 10W dissipation capability and wide temperature range for demanding industrial or military-grade applications where standard surface-mount devices are unsuitable.

Part Context

This part belongs to the standard MIL-spec style Zener diode family. It shares the 1N2982 series electrical characteristics but differs in packaging and manufacturing origin from other variants like the 1N2982B. The RB suffix typically denotes specific testing or packaging variations within the Microchip portfolio.

Replacement Considerations

Direct substitutes include JANTX1N2982D from Microsemi, which shares identical 18V/10W specifications and DO-4 packaging. Verify pinout polarity, as some variants connect the case to the anode while others use the cathode.