1N2841RB

Overview

The Microchip Technology 1N2841RB is a high-reliability silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 120 V with a maximum power dissipation of 50 W. The device utilizes a TO-204AD (TO-3) through-hole package, characterized by a metal disk button form factor suitable for robust mounting. Key electrical specifications include a maximum Zener impedance of 40 Ohms and a leakage current of 10 µA at 91.2 V. It operates within a temperature range of -65 °C to 175 °C and is unidirectional.

Feature Summary

• High reliability construction suitable for demanding environments
• Robust 50 W power handling capability in a hermetically sealed metal package
• Wide operating temperature range extending to 175 °C

Applications

• High-power voltage regulation circuits
• Industrial control systems requiring robust protection
• Military and aerospace electronic assemblies

Procurement Notes

Verify the specific manufacturer lineage, as the component was originally produced by Microsemi, which was acquired by Microchip Technology. Confirm that the procurement source provides documentation supporting the high-reliability classification and hermetic sealing status. Ensure the TO-204AD package dimensions match the design requirements. Check for any lead-based material declarations if RoHS compliance is strictly required for the end application, noting potential variations in suffix codes.

Selection Notes

Select this component when a high-voltage, high-power Zener diode is required for critical voltage reference or clamping tasks. The 120 V rating and 50 W dissipation make it distinct from lower-power surface-mount alternatives. Consider the thermal management needs associated with the TO-204AD package, which typically requires direct mounting to a heatsink or chassis for optimal performance. Verify that the 40 Ohm impedance meets the dynamic regulation requirements of the circuit.

Part Context

The 1N2841RB belongs to the family of high-power Zener diodes historically manufactured by Microsemi and now managed by Microchip Technology. These components are often designated for military and aerospace standards due to their hermetic sealing and high-reliability construction. The TO-204AD package is a standard industry format for high-power discrete semiconductors, offering superior thermal conductivity compared to plastic packages.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided data. Users should consult official Microchip or Microsemi cross-reference guides for verified equivalents.