1N2982A

Overview

The Microchip Technology 1N2982A is a 10-watt silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 18V with a ±5% tolerance. The component utilizes a DO-213AA (DO-4) stud mount package, which facilitates efficient thermal dissipation and robust mechanical mounting. It operates as a unidirectional device with a maximum operating temperature of 175°C. The construction involves a hermetically sealed metal case to ensure reliability in demanding environments.

Feature Summary

• High power handling capability of 10 watts for stable voltage regulation
• Hermetically sealed metal package ensuring environmental protection
• Stud mount configuration for direct chassis or heat sink attachment
• Wide operating temperature range up to 175°C

Applications

• High-power voltage reference circuits
• Industrial power supply regulation
• Military and aerospace electronic systems requiring radiation hardness
• Overvoltage protection in critical infrastructure

Procurement Notes

Verify the specific suffix code (e.g., A, B, D) to confirm voltage tolerance and test conditions, as these alter electrical specifications. Confirm lead-free status if RoHS compliance is required, noting that many variants are non-compliant. Ensure the procurement specification matches the DO-213AA/DO-4 package dimensions for proper mechanical integration. Request full datasheets from authorized Microchip distributors to validate current production status and testing standards.

Selection Notes

Select this component when high power dissipation and ruggedness are prioritized over compact footprint. The stud mount design requires compatible hardware for secure installation. Compare tolerance requirements against other variants like the 1N2982B or JANTX1N2982D if tighter voltage accuracy is needed. Ensure the application environment supports the high thermal mass and mounting constraints associated with metal DO-4 packages.

Part Context

The 1N2982A belongs to the 1N298x series of high-power Zener diodes manufactured by Microchip Technology (formerly Microsemi). This series is widely recognized for its use in military, aerospace, and industrial sectors where reliability under extreme conditions is mandatory. The DO-4 package is a legacy standard still utilized in applications requiring proven long-term performance and high thermal stability.

Replacement Considerations

Direct substitutes include the Central Semiconductor 1N2982B and the Microsemi JANTX1N2982D. Verify that replacement parts match the 18V nominal voltage and 10W power rating. Check for differences in voltage tolerance, as the 'B' suffix typically denotes 5% tolerance while others may vary. Ensure the replacement maintains the DO-213AA/DO-4 package style for mechanical compatibility.