1N2970B

Overview

The Microchip Technology 1N2970B is a 10 W Zener diode with a nominal regulation voltage of 6.8 V and ±5% tolerance. It features a maximum Zener impedance of 1.2 Ohms and a forward voltage of 1.5 V at 2 A. The device operates within a temperature range of -65°C to 175°C, with a reverse leakage current of 10 µA at 5.4 V. Packaged in the DO-4 (DO-203AA) stud-mount configuration, it utilizes internal solder bond construction and hermetic sealing for durability.

Feature Summary

• Hermetically sealed welded construction with internal solder bond design
• High power dissipation capability of 10 Watts
• Wide operating temperature range from -65°C to 175°C
• Stud mount chassis installation for efficient thermal management

Applications

• Voltage regulation circuits requiring high power handling
• Overvoltage protection systems
• Reference voltage sources in industrial environments

Procurement Notes

Verify the specific revision level and qualification grade (Commercial, JAN, JANTX, or JANTXV) required for your application, as these variants share the same electrical specifications but differ in reliability standards. Confirm that the DO-4 stud mount package fits your chassis mounting constraints. Ensure thermal interface materials are compatible with the metal case for optimal heat dissipation during operation.

Selection Notes

Select this component when a robust, high-power Zener diode is needed for voltage clamping or regulation. The 6.8 V rating suits applications requiring precise low-voltage references. Consider the stud mount package for superior thermal performance compared to leaded packages. Verify that the system can accommodate the physical size and mounting hardware required for the DO-4 case style.

Part Context

The 1N2970B belongs to the 1N2970B through 1N3015B series of 10 Watt Zener diodes manufactured by Microchip Technology. This series offers voltage regulation values ranging from 3.9 V to 200 V. These devices are JEDEC registered and available in various qualification levels including Commercial, JAN, JANTX, and JANTXV, catering to diverse military and industrial requirements.

Replacement Considerations

Compatible substitutes include other manufacturers' 1N2970B equivalents meeting MIL-PRF-19500/124 specifications. Ensure replacement parts maintain the 6.8 V Zener voltage, 10 W power rating, and DO-4 stud mount package. Verify that any alternative meets the same hermetic sealing and temperature range requirements.