1N2981A

Overview

The 1N2981A is a single Zener diode manufactured by Microchip Technology, designed for voltage regulation and circuit protection applications. It features a nominal Zener voltage of 17 V with a tolerance of ±5%. The device is rated for a power dissipation of 10 W and utilizes a chassis stud mount configuration in the DO-213AA package. Key electrical parameters include a Zener test current of 4 A and a maximum impedance of 0.075 Ω at the test point.

Feature Summary

• Provides stable voltage regulation through constant voltage maintenance across varying load conditions
• Capable of handling high power dissipation for robust circuit protection scenarios
• Utilizes a chassis stud mount design to facilitate efficient thermal management and heat sinking

Applications

• High-power voltage regulation in industrial power supplies
• Circuit protection against overvoltage transients in heavy-duty equipment
• Reference voltage sources in precision measurement instrumentation

Procurement Notes

Verify manufacturer source authenticity as multiple entities list this part number. Confirm RoHS compliance status, as some listings indicate leaded construction while others suggest compliance. Ensure the specific package variant matches your thermal requirements. Cross-reference datasheets from Microchip or authorized distributors to confirm exact electrical tolerances before finalizing procurement orders.

Selection Notes

Select this component when a 17 V reference with high power handling is required. The stud mount package necessitates compatible mounting hardware and thermal interface materials. Consider the ±5% voltage tolerance for precision requirements. Evaluate thermal resistance characteristics to ensure adequate heat sinking solutions are integrated into the system design for reliable long-term operation under full load conditions.

Part Context

This component belongs to the family of 10 Watt Zener diodes, which includes variants such as the 1N2982A. These devices share similar power ratings and mechanical mounting styles but differ in nominal Zener voltage specifications. The series is commonly used in applications requiring robust voltage clamping capabilities in industrial and automotive environments where standard surface-mount packages cannot dissipate sufficient heat.

Replacement Considerations

Direct substitutes may include other manufacturers' equivalents meeting the 17 V, 10 W, DO-213AA specification. Verify pinout compatibility and thermal performance metrics. Ensure replacement parts maintain the same voltage tolerance and impedance characteristics to preserve circuit functionality without redesigning the mounting infrastructure.