1N2975A

Overview

The 1N2975A is a 10 W Zener diode with an 11 V nominal regulation voltage and ±5% tolerance. It features a maximum impedance of 3 Ohms and operates within a temperature range of -65°C to 175°C. The device utilizes a DO-4 (DO-203AA/DO-213AA) stud-mount package for chassis installation.

Feature Summary

• Hermetically sealed welded construction
• Internal solder bond design
• Robust 3 Ohm impedance

Applications

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

Procurement Notes

Verify the manufacturer source, as Microchip Technology acquired Microsemi Corporation which originally produced this series. Confirm the specific qualification level (Commercial, JAN, JANTX, or JANTXV) required for your application, as availability varies by grade. Ensure the DO-4 stud-mount package matches your thermal and mechanical mounting constraints.

Selection Notes

Select this component for applications requiring high-power dissipation up to 10 W and wide operating temperatures. The 11 V regulation point suits specific reference needs. Consider the stud-mount form factor for efficient heat sinking compared to leaded axial packages.

Part Context

This part belongs to the JEDEC registered 1N2970B through 1N3015B series of 10 W Zener diodes. These components offer regulation voltages ranging from 3.9 V to 200 V. The series is qualified per MIL-PRF-19500/124 for military grades.

Replacement Considerations

Equivalent parts include other 10 W Zener diodes with 11 V regulation in DO-4 packages. Verify pinout compatibility and thermal resistance specifications when substituting.