1N2993A

Overview

The Microchip Technology 1N2993A is a single Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 43 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 10 W and exhibits a maximum dynamic impedance of 12 Ohms. Reverse leakage current is specified at 10 µA when tested at 32.7 V. The component utilizes a stud-mount configuration within the DO-213AA package, ensuring robust mechanical stability for chassis mounting.

Feature Summary

• Hermetically sealed welded construction for environmental protection
• Internal solder bond design for reliable electrical connections
• Stud-mount topology suitable for direct chassis attachment

Applications

• Voltage regulation in industrial control systems
• Overvoltage protection circuits in power supplies
• Reference voltage generation in precision measurement equipment

Procurement Notes

Verify the manufacturer designation on the datasheet, as historical production may involve Microsemi or other entities under the Microchip portfolio. Confirm the specific package variant matches the required thermal and mechanical constraints. Ensure the ordering suffix corresponds to the exact termination and marking requirements for your assembly process. Cross-reference the part number with official Microchip databases to confirm current active status and availability.

Selection Notes

Select this component when a stable 43 V reference is required in high-power environments. The 10 W rating supports significant current handling compared to smaller surface-mount alternatives. The stud-mount form factor facilitates efficient heat transfer to a heatsink or chassis. Evaluate the 12 Ohm impedance against circuit sensitivity requirements to ensure adequate regulation performance under varying load conditions.

Part Context

This component belongs to the family of 10 Watt Zener diodes manufactured by Microchip Technology. These devices are engineered for rugged applications requiring high power dissipation and long-term reliability. The series typically offers various voltage options within a standardized stud-mount package, allowing designers to select appropriate regulation levels while maintaining consistent mechanical and thermal interface characteristics across different system designs.

Replacement Considerations

Direct substitutes include other 1N2993A variants from different manufacturers that meet the same 43 V, 10 W, and DO-213AA specifications. Verify pinout compatibility and thermal resistance values before substitution. Alternative parts must maintain hermetic sealing if used in harsh environments. Consult official cross-reference lists for guaranteed functional equivalence.