1N2837RB

Overview

The 1N2837RB is a single silicon Zener diode manufactured by Microchip Technology, designed for high-power voltage regulation applications. It features a nominal Zener voltage of 91 V with a tolerance of ±5% and a maximum power dissipation of 50 W. The device utilizes a TO-204AD (TO-3) through-hole package with a flange mount configuration, where the case serves as the cathode connection. It operates within a temperature range of 0 to 175 °C and exhibits a maximum Zener impedance of 15 Ohms.

Feature Summary

• High power handling capability of 50 watts for robust voltage regulation
• Hermetically sealed metal flange mount construction for durability
• Wide operating junction temperature range up to 175 degrees Celsius
• Single unidirectional silicon Zener diode configuration

Applications

• Industrial power supply voltage regulation
• Military and aerospace electronic systems requiring hermetic sealing
• High-voltage reference circuits in harsh environments
• Overvoltage protection in heavy-duty equipment

Procurement Notes

Verify the specific manufacturer source, as historical production involves Microsemi and Microchip Technology. Confirm the package variant matches the required TO-204AD form factor. Ensure compliance with any applicable military or industrial standards if hermetic sealing is critical for the intended deployment environment.

Selection Notes

Select this component when a high-power, hermetically sealed Zener diode is required for stable voltage reference at 91 volts. The TO-3 package facilitates direct heat sinking to chassis structures. Consider the ±5% tolerance and thermal characteristics to ensure compatibility with the circuit's regulatory requirements and ambient operating conditions.

Part Context

This component belongs to the general-purpose 50-watt Zener diode series. It is commonly used in applications demanding reliable voltage clamping under high current loads. The TO-3 metal case design distinguishes it from lower-power plastic-packaged alternatives, offering superior thermal performance and environmental resistance for critical infrastructure and defense electronics.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify cross-reference availability with authorized distributors before implementation.