1N2841B

Overview

The 1N2841B is a silicon Zener diode manufactured by Microchip Technology, designed for voltage regulation applications. It features a nominal Zener voltage of 120V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 50W and operates within a temperature range of -65°C to +175°C. It utilizes an internal solder bond construction and is hermetically sealed in a TO-204AD (TO-3) package.

Feature Summary

• Hermetically sealed welded construction for environmental protection
• Internal solder bond construction for mechanical stability
• JEDEC registered part number ensuring standard compliance

Applications

• High-power voltage regulation circuits
• Industrial equipment requiring high reliability
• Military and aerospace electronic systems

Procurement Notes

Verify the specific manufacturer source, as the component was originally associated with Microsemi Corporation before its acquisition by Microchip Technology. Confirm RoHS compliance status, as historical data indicates some variants may be lead-containing or non-compliant depending on the production batch and specific ordering suffix. Ensure the package type matches the required thermal and mechanical constraints.

Selection Notes

Select this component for applications requiring robust, high-power Zener regulation at 120V. The TO-204AD package offers significant thermal mass suitable for high-wattage dissipation. Consider the operating temperature range up to 175°C when designing for extreme environments. Verify that the ±5% tolerance meets the circuit's precision requirements.

Part Context

This part belongs to the JEDEC registered 1N2804 through 1N2846B series of silicon Zener diodes. These components are characterized by their hermetic sealing and internal solder bonds, distinguishing them from modern surface-mount alternatives. The series is historically significant in military and high-reliability industrial sectors.

Replacement Considerations

Direct replacements include other 1N2841B units from qualified manufacturers. Cross-reference with 1N4564B if pinout and electrical characteristics align, though package differences must be accounted for. Verify that any substitute maintains the 50W power rating and hermetic seal requirement.