1N2827RB

Overview

The 1N2827RB is a single silicon Zener diode manufactured by Microchip Technology. It features a nominal Zener voltage of 43 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 50 W and operates in a through-hole TO-204AD (TO-3) package. Key electrical parameters include a test current of 290 mA and an incremental impedance of 4.5 Ohms. It is designed for voltage regulation applications requiring high power handling capabilities.

Feature Summary

• High power dissipation capability of 50 watts for robust voltage regulation
• Precision voltage tolerance of ±5% at the nominal 43 V Zener potential
• Hermetically sealed construction suitable for demanding environments

Applications

• High-power voltage reference circuits
• Overvoltage protection systems
• Industrial power supply regulation

Procurement Notes

Verify the manufacturer origin, as this component has been produced by multiple entities including Motorola and Microsemi. Confirm RoHS compliance status, as some variants are leaded and non-compliant. Ensure the specific suffix matches the required tolerance and packaging specifications before procurement to avoid functional mismatches.

Selection Notes

Select this component when a stable 43 V reference is required with significant power handling needs. The TO-3 package necessitates adequate heatsinking due to the 50 W rating. Consider the ±5% tolerance if tighter precision is not critical. Verify thermal management requirements for the specific application environment.

Part Context

This part belongs to the standard 1N2827 series of 50-watt Zener diodes. Variants such as 1N2827A, B, C, D, E, and F offer different voltage ratings within the same power class. The 'R' suffix typically denotes specific testing or hermetic sealing characteristics depending on the original manufacturer's designation system.

Replacement Considerations

Direct substitutes include other manufacturers' equivalents like the Motorola 1N2827RB or generic 1N2827B series parts with matching 43V/50W specifications. Ensure pinout compatibility and thermal resistance values align with the existing design constraints.