1N2974BE3

Overview

The 1N2974BE3 is a Zener diode manufactured by Microchip Technology, designed for voltage regulation applications. It features a nominal Zener voltage of 10V and a maximum power dissipation of 5W. The device utilizes a T-18-2 (DO-5) axial leaded package suitable for through-hole mounting. Key electrical specifications include a test current of 50mA, a maximum reverse leakage current of 500nA at rated voltage, and a Zener impedance of 2.5 Ohms. It operates within a temperature range of -65°C to +150°C and carries an EIAJ marking code of 'E'.

Feature Summary

• Provides stable voltage regulation with a 10V nominal breakdown voltage.
• Capable of handling high power dissipation up to 5W in a robust axial package.
• Features low reverse leakage current for efficient standby operation.
• Designed for reliable performance across extended industrial and military temperature ranges.

Applications

• Voltage reference circuits requiring stable DC levels.
• Over-voltage protection stages in power supplies.
• Clamping applications in signal conditioning paths.
• General-purpose voltage regulation in electronic assemblies.

Procurement Notes

Verify the specific suffix 'E3' indicates lead-free compliance when sourcing replacements. Confirm the manufacturer's current production status as legacy components may have limited availability or require obsolescence checks. Ensure the T-18-2 package dimensions match the target PCB footprint requirements before finalizing procurement decisions.

Selection Notes

Select this component when a 10V regulation point is required with moderate current handling capabilities. The 5W power rating allows for higher current operation compared to standard small-signal diodes. Consider the axial leaded format for applications where surface-mount space is not constrained but mechanical stability is preferred.

Part Context

This part belongs to the 1N297x series of high-power Zener diodes produced by Microchip Technology. These devices are commonly used in industrial control systems and aerospace electronics where reliability under harsh environmental conditions is critical. The series offers various voltage options within the same physical package form factor.

Replacement Considerations

Direct substitutes must match the 10V Zener voltage, 5W power rating, and T-18-2 package. Verify that alternative manufacturers provide equivalent Zener impedance and leakage current specifications to ensure circuit compatibility without redesign.