1N2994B

Overview

The Microchip Technology 1N2994B is a single Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 45 V with a tolerance of ±5%. The device has a maximum power dissipation rating of 10 W and operates within a specified temperature range. Key electrical parameters include a test current of 55 mA, a maximum Zener impedance of 13 Ohms, and a leakage current of 10 µA at the rated voltage. The component utilizes internal solder bond construction and is hermetically sealed.

Feature Summary

• Hermetically sealed welded construction for environmental protection
• Internal solder bond construction for mechanical stability
• High power handling capability suitable for chassis mounting

Applications

• Voltage regulation in high-power circuits
• Chassis mounted power supply protection
• Industrial equipment voltage reference

Procurement Notes

Verify the specific manufacturer source, as this part number is associated with multiple entities including Microchip Technology and America Semiconductor LLC. Confirm that the received component matches the DO-213AA package style and 10 W power rating specifications. Ensure the datasheet provided corresponds to the 45 V Zener voltage variant to avoid confusion with other series members.

Selection Notes

Select this component when a robust, hermetically sealed Zener diode with 10 W power dissipation is required. The stud mount configuration allows for direct thermal coupling to heat sinks or chassis structures. Consider the 45 V breakdown voltage and 5% tolerance for precise regulation needs in industrial environments where reliability is critical.

Part Context

This device belongs to the JEDEC registered 1N2970 through 1N3015B series of high-power Zener diodes. These components are characterized by their rugged DO-213AA (TO-5) metal case package. The series provides a wide range of standard Zener voltages, offering designers a reliable option for power regulation tasks requiring hermetic sealing and high thermal stability.

Replacement Considerations

Cross-reference with other manufacturers producing the 1N2994B specification, such as America Semiconductor LLC. Verify pinout compatibility and ensure the replacement maintains the 10 W power rating and hermetic seal requirements. Check for equivalent Zener voltage and impedance characteristics.