1N2970D

Overview

The Microchip Technology 1N2970D is a 10W Zener diode with a nominal voltage of 6.8V, operating within the 1N2970B–1N3015B series. It features a DO-4 (DO-213AA) stud-mount package and hermetically sealed construction. The device provides standard +/- 5% tolerance and supports junction temperatures from -65°C to +175°C. Qualified under MIL-PRF-19500/124 for JAN, JANTX, and JANTXV grades, it offers radiation hardness and ESD immunity.

Feature Summary

• Hermetically sealed welded metal and glass construction with internal solder bond.
• Inherently radiation hard per Microsemi MicroNote 050.
• Immune to electrostatic discharge per MIL-STD-750 method 1020.
• Standard polarity configuration places the anode at the mounting stud.

Applications

• Voltage regulation across broad current and temperature ranges.
• High-reliability military and aerospace electronic systems.
• Harsh environment applications requiring radiation hardness.

Procurement Notes

Verify the specific reliability grade (JAN, JANTX, or JANTXV) required for your application, as these levels are available separately. Confirm that the standard polarity (anode to stud) aligns with your circuit design; reverse polarity variants exist but require distinct ordering suffixes. Ensure thermal management accounts for the 12°C/W junction-to-case resistance and power derating above 55°C.

Selection Notes

Select this component when a high-power 10W Zener diode is needed in a ruggedized stud-mount package. The 1N2970D is suitable for circuits requiring stable voltage reference at 6.8V with tight tolerance. Consider the thermal resistance and maximum regulator current limits when designing heat dissipation paths for continuous operation near maximum ratings.

Part Context

This part belongs to the JEDEC registered 1N2970B through 1N3015B series of 10W Zener diodes. These devices cover a wide voltage range from 3.9V to 200V and are manufactured by Microchip Technology (formerly Microsemi). They are designed for demanding environments where long-term stability and physical robustness are critical requirements.

Replacement Considerations

Direct replacements must match the 10W power rating, 6.8V nominal voltage, and DO-4 stud-mount package. Verify that any substitute component meets the same MIL-PRF-19500/124 qualification level and maintains compatible thermal characteristics and polarity orientation.

FAQ

What is the terminal polarity for the 1N2970D?

The standard polarity for the 1N2970B series places the anode at the mounting stud and the cathode at the top terminal.

Is the 1N2970D resistant to radiation?

Yes, the device is inherently radiation hard as described in Microsemi MicroNote 050.