1N2971B

Overview

The Microchip Technology 1N2971B is a 10-watt Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 7.5V with a tolerance of ±5%. The device operates with a test current of 335mA and supports a maximum DC current of 1180mA. It exhibits a maximum reverse leakage current of 75μA and an impedance of 1.3 Ohms. The component utilizes a stud-mount configuration within the DO-4 package, facilitating direct chassis attachment for thermal management.

Feature Summary

• Provides stable voltage regulation at 7.5V with high power dissipation capability
• Features an anode-to-case electrical connection for efficient heat transfer
• Designed for robust performance in stud-mount configurations

Applications

• High-power voltage regulation circuits
• Chassis-mounted power supply protection
• Industrial equipment overvoltage suppression

Procurement Notes

Verify the specific manufacturer source, as multiple vendors produce this standard part number. Confirm RoHS compliance status if required by your assembly process. Ensure the stud-mount interface matches your thermal design requirements. Check for any suffix variations that may indicate different tolerance levels or packaging formats before finalizing procurement.

Selection Notes

Select this component when a 10W Zener diode with a 7.5V breakdown voltage is required. The stud-mount package is essential for applications needing direct thermal coupling to a heatsink or chassis. Verify that the 335mA test current aligns with your circuit's operating conditions. Consider the 1.3 Ohm impedance for dynamic regulation needs.

Part Context

The 1N2971B belongs to the standard 1N29xx series of high-power Zener diodes. These components are widely used in industrial and military-grade electronics where reliable voltage reference and surge protection are critical. The DO-4 package is a legacy but robust form factor suitable for high-current applications.

Replacement Considerations

Compatible substitutes include JANTX1N2971BRB from Microsemi, which offers similar specifications under MIL-PRF-19500/124 qualification. Other generic equivalents from manufacturers like Digitron or Naina Semiconductor may also serve as functional replacements if pinout and thermal characteristics match.