1N2812B

Overview

The Microchip Technology 1N2812B is a high-power Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 14 V with a tolerance of ±5%. The device supports a maximum power dissipation of 50 W and operates within a temperature range of -65°C to 175°C. Key electrical characteristics include a maximum dynamic impedance of 1.2 Ohms, a reverse leakage current of 10 µA at 10.6 V, and a forward voltage of 1.5 V at 10 A. It utilizes a TO-204AD (TO-3) through-hole package.

Feature Summary

• Hermetically sealed welded construction for environmental protection
• Internal solder bond construction for mechanical stability
• Capable of operation up to 50 W with adequate heat sinking

Applications

• High power voltage regulation
• Military qualified circuits (JAN/JANTX/JANTXV variants)
• Industrial equipment requiring robust thermal performance

Procurement Notes

Verify the specific suffix requirements against the official datasheet, as military qualifications such as JAN, JANTX, or JANTXV may be available on select part numbers within this series. Confirm RoHS compliance status, as commercial versions may differ from qualified variants. Ensure proper mounting and heat sinking are planned to support the 50 W power rating during operation.

Selection Notes

Select this component when a 14 V regulation point is required in a high-power environment. The TO-204AD package offers low thermal resistance suitable for dissipating up to 50 W. Consider the operating temperature range of -65°C to 175°C for extreme condition applications. Verify that the ±5% tolerance meets the circuit precision requirements.

Part Context

This component belongs to the JEDEC registered 1N2804B through 1N2846B series of 50 Watt Zener diodes manufactured by Microchip Technology. The series provides a broad range of voltages from 3.9 V to 200 V. These devices are often associated with high-reliability standards and may be qualified per MIL-PRF-19500/114 for specific military grades.

Replacement Considerations

The 1N2812RB is documented as a parameter-equivalent substitute.