1N2812RB

Overview

The Microchip Technology 1N2812RB is a high-power silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 14 V with a tolerance of ±10%. The device is rated for a maximum power dissipation of 50 W and operates within a junction temperature range of -65 °C to 175 °C. Key electrical characteristics include a maximum dynamic impedance of 1.2 Ω and a knee impedance of 80 Ω. It utilizes a TO-204AD (TO-3) flange mount package with the cathode connected to the case.

Feature Summary

• Hermetically sealed welded construction for environmental protection
• Internal solder bond construction for mechanical reliability
• Flange mount package design facilitating efficient heat sinking

Applications

• High power voltage regulation circuits
• Industrial equipment requiring robust voltage references
• Military and aerospace systems utilizing qualified components

Procurement Notes

Verify compliance requirements as this component may not meet RoHS standards depending on the specific manufacturing lot or revision. Confirm the exact suffix designation matches the required tolerance and qualification level, such as commercial versus military grades. Ensure thermal management solutions are adequate for the 50 W power rating during operation.

Selection Notes

Select this component when a 14 V reference with high power handling capability is required. The TO-204AD package allows for direct mounting to heatsinks. Consider the 10% tolerance if tighter regulation is needed, in which case variants like the 1N2812B with ±5% tolerance should be evaluated instead.

Part Context

The 1N2812RB belongs to the JEDEC registered 1N2804B through 1N2846B series of 50 Watt Zener diodes manufactured by Microchip Technology. This series provides a broad range of voltage values from 3.9 V to 200 V. The RB suffix typically denotes a specific tolerance band within this family.

Replacement Considerations

The 1N2812B is listed as a parameter equivalent substitute. Verify that the ±5% tolerance of the B variant meets the circuit requirements if replacing the 10% tolerance RB variant.