1N3003A

Overview

The Microchip Technology 1N3003A is a single Zener diode designed for voltage regulation applications. It features a nominal reference voltage of 82 V with a maximum tolerance of 5%. The device supports a maximum power dissipation of 10 W and operates at a test current of 30 mA. It exhibits a maximum dynamic impedance of 25 Ω and can withstand a maximum operating temperature of 175 °C. The component utilizes a DO-213AA package configuration suitable for chassis or stud mounting.

Feature Summary

• Provides stable voltage regulation with an 82 V nominal breakdown voltage
• Supports high power dissipation up to 10 W for robust thermal performance
• Features low dynamic impedance of 25 Ω for precise voltage control
• Designed for chassis or stud mounting via DO-213AA package

Applications

• Voltage regulation circuits
• Power supply protection
• Reference voltage generation

Procurement Notes

Verify the specific manufacturer source, as components labeled 1N3003A are produced by multiple entities including Microchip Technology and Semicon Components Inc. Confirm that the requested unit matches the Microchip Technology specification sheet, particularly regarding the 5% tolerance variant, to ensure compatibility with design requirements. Check datasheet revisions for any updates to mechanical dimensions or electrical limits before finalizing procurement orders.

Selection Notes

Select this component when a fixed 82 V reference point is required in high-power environments. The 10 W rating allows for significant heat dissipation without active cooling in many chassis-mounted scenarios. Ensure the circuit design accounts for the 30 mA test current condition to maintain accuracy within the specified 5% tolerance band. Verify that the mounting style aligns with the available PCB or panel space for stud mounting.

Part Context

The 1N3003A belongs to the family of 10 Watt Zener diodes, historically associated with manufacturers like Microsemi Corporation and now Microchip Technology. These devices are standard replacements for older military-grade specifications. The part number suffix 'A' typically denotes the tighter 5% tolerance version compared to standard variants which may have 10% or 20% tolerances.

Replacement Considerations

Direct substitutes include other 10 W Zener diodes with an 82 V nominal voltage and 5% tolerance. Verify pinout compatibility and thermal resistance characteristics when swapping between different manufacturers such as Semicon Components Inc or TAECL.